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<!--Weave of 'Ramification' generated by Inweb-->
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<div class="breadcrumbs">
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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../intern.html">Inter Modules</a></li><li><a href="index.html">building</a></li><li><a href="index.html#2">Chapter 2: Blueprints</a></li><li><b>Ramification</b></li></ul></div>
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<p class="purpose">Turning textual code written in Inform 6 syntax into an inter schema.</p>
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<ul class="toc"><li><a href="2-rmf.html#SP1">§1. Introduction</a></li><li><a href="2-rmf.html#SP3">§3. The implied braces ramification</a></li><li><a href="2-rmf.html#SP4">§4. The unbrace schema ramification</a></li><li><a href="2-rmf.html#SP5">§5. The divide schema ramification</a></li><li><a href="2-rmf.html#SP6">§6. The undivide schema ramification</a></li><li><a href="2-rmf.html#SP7">§7. The resolve halfopen blocks ramification</a></li><li><a href="2-rmf.html#SP8">§8. The break early bracings ramification</a></li><li><a href="2-rmf.html#SP9">§9. The strip leading white space ramification</a></li><li><a href="2-rmf.html#SP10">§10. The split switches into cases ramification</a></li><li><a href="2-rmf.html#SP12">§12. The split print statements ramification</a></li><li><a href="2-rmf.html#SP13">§13. The identify constructs ramification</a></li><li><a href="2-rmf.html#SP14">§14. The break for statements ramification</a></li><li><a href="2-rmf.html#SP15">§15. The add missing bodies ramification</a></li><li><a href="2-rmf.html#SP16">§16. The remove empty expressions ramification</a></li><li><a href="2-rmf.html#SP17">§17. The outer subexpressions ramification</a></li><li><a href="2-rmf.html#SP18">§18. The top level commas ramification</a></li><li><a href="2-rmf.html#SP19">§19. The multiple case values ramification</a></li><li><a href="2-rmf.html#SP20">§20. The strip all white space ramification</a></li><li><a href="2-rmf.html#SP21">§21. The debracket ramification</a></li><li><a href="2-rmf.html#SP24">§24. The implied return values ramification</a></li><li><a href="2-rmf.html#SP25">§25. The message calls ramification</a></li><li><a href="2-rmf.html#SP26">§26. The sanity check ramification</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. Introduction. </b>Once <a href="2-tkn.html" class="internal">Tokenisation</a> has been done, we have an inter schema which is not
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really a tree, but a linked list in all but name —
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> EXPRESSION_ISNT</span>
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<span class="plain-syntax"> T1</span>
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<span class="plain-syntax"> T2</span>
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<span class="plain-syntax"> T3</span>
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<span class="plain-syntax"> T4</span>
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<span class="plain-syntax"> ...</span>
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</pre>
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<p class="commentary">So, there is no internal structure yet. "Ramification" performs a series of
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transformations on this tree, gradually shaking out the (sometimes ambiguous)
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syntactic markers such as <span class="extract"><span class="extract-syntax">COMMA_ISTT</span></span> and replacing them with semantically
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clear subtrees.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::go</span><button class="popup" onclick="togglePopup('usagePopup1')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup1">Usage of <span class="code-font"><span class="function-syntax">Ramification::go</span></span>:<br/>Parsing Inter Schemas - <a href="2-pis.html#SP5">§5</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sch</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP3" class="function-link"><span class="function-syntax">Ramification::implied_braces</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP4" class="function-link"><span class="function-syntax">Ramification::unbrace_schema</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP5" class="function-link"><span class="function-syntax">Ramification::divide_schema</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP6" class="function-link"><span class="function-syntax">Ramification::undivide_schema</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP7" class="function-link"><span class="function-syntax">Ramification::resolve_halfopen_blocks</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP8" class="function-link"><span class="function-syntax">Ramification::break_early_bracings</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP9" class="function-link"><span class="function-syntax">Ramification::strip_leading_white_space</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP10" class="function-link"><span class="function-syntax">Ramification::split_switches_into_cases</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP9" class="function-link"><span class="function-syntax">Ramification::strip_leading_white_space</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP12" class="function-link"><span class="function-syntax">Ramification::split_print_statements</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP13" class="function-link"><span class="function-syntax">Ramification::identify_constructs</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP14" class="function-link"><span class="function-syntax">Ramification::break_for_statements</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP15" class="function-link"><span class="function-syntax">Ramification::add_missing_bodies</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP16" class="function-link"><span class="function-syntax">Ramification::remove_empties</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP17" class="function-link"><span class="function-syntax">Ramification::outer_subexpressions</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP18" class="function-link"><span class="function-syntax">Ramification::top_level_commas</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP19" class="function-link"><span class="function-syntax">Ramification::multiple_case_values</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP20" class="function-link"><span class="function-syntax">Ramification::strip_all_white_space</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP21" class="function-link"><span class="function-syntax">Ramification::debracket</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP24" class="function-link"><span class="function-syntax">Ramification::implied_return_values</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP25" class="function-link"><span class="function-syntax">Ramification::message_calls</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><a href="2-rmf.html#SP26" class="function-link"><span class="function-syntax">Ramification::sanity_check</span></a><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. </b>Each transformation will be applied until it returns <span class="extract"><span class="extract-syntax">FALSE</span></span> to say that
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it could see nothing to do, or <span class="extract"><span class="extract-syntax">NOT_APPLICABLE</span></span> to say that it did but
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that it doesn't want to be called again. Some transformations make use
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of temporary markers attached to nodes or tokens in the tree, so we clear
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these out at the start of each iteration.
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</p>
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<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="identifier-syntax">REPEATEDLY_APPLY</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><a href="2-rmf.html#SP2" class="function-link"><span class="function-syntax">Ramification::unmark</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sch</span><span class="plain-syntax">-></span><span class="element-syntax">node_tree</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">sch</span><span class="plain-syntax">-></span><span class="element-syntax">parsing_errors</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">rv</span><span class="plain-syntax"> = </span><span class="identifier-syntax">X</span><span class="plain-syntax">(</span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">sch</span><span class="plain-syntax">-></span><span class="element-syntax">node_tree</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">rv</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">SCHEMA_COMPILATION_DETAILS</span><span class="plain-syntax">, </span><span class="string-syntax">"After round of "</span><span class="plain-syntax"> #</span><span class="identifier-syntax">X</span><span class="plain-syntax"> </span><span class="string-syntax">":\n$1\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">sch</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">rv</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NOT_APPLICABLE</span><span class="plain-syntax">) </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> }</span>
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</pre>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::unmark</span><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">node_marked</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">; </span><span class="identifier-syntax">t</span><span class="plain-syntax">; </span><span class="identifier-syntax">t</span><span class="plain-syntax">=</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">preinsert</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">postinsert</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><a href="2-rmf.html#SP2" class="function-link"><span class="function-syntax">Ramification::unmark</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>§3. The implied braces ramification. </b>In common with most C-like languages, though unlike Perl, Inform 6 makes braces
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optional around code blocks which contain only a single statement. Thus:
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">x</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) </span><span class="reserved-syntax">print</span><span class="plain-syntax"> </span><span class="string-syntax">"x is 1.^"</span><span class="plain-syntax">;</span>
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</pre>
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<p class="commentary">is understood as if it were
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">x</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) { </span><span class="reserved-syntax">print</span><span class="plain-syntax"> </span><span class="string-syntax">"x is 1.^"</span><span class="plain-syntax">; }</span>
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</pre>
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<p class="commentary">But we will find future ramifications much easier to code up if braces are
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always used. So this one looks for cases where braces have been omitted,
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and inserts them around the single statements in question.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::implied_braces</span><button class="popup" onclick="togglePopup('usagePopup2')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup2">Usage of <span class="code-font"><span class="function-syntax">Ramification::implied_braces</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">at</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">at</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">; </span><span class="identifier-syntax">t</span><span class="plain-syntax">; </span><span class="identifier-syntax">t</span><span class="plain-syntax">=</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">RESERVED_ISTT</span><span class="plain-syntax">) &&</span>
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|
<span class="plain-syntax"> ((</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax"> == </span><span class="constant-syntax">IF_I6RW</span><span class="plain-syntax">) ||</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax"> == </span><span class="constant-syntax">WHILE_I6RW</span><span class="plain-syntax">) ||</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax"> == </span><span class="constant-syntax">FOR_I6RW</span><span class="plain-syntax">) ||</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax"> == </span><span class="constant-syntax">SWITCH_I6RW</span><span class="plain-syntax">) ||</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax"> == </span><span class="constant-syntax">OBJECTLOOP_I6RW</span><span class="plain-syntax">))) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">++;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax">--;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) { </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">; }</span>
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<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> }</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">)) </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> != </span><span class="constant-syntax">OPEN_BRACE_ISTT</span><span class="plain-syntax">))</span>
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|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP3_1" class="named-paragraph-link"><span class="named-paragraph">Make pre and post markers from here</span><span class="named-paragraph-number">3.1</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">RESERVED_ISTT</span><span class="plain-syntax">) &&</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax"> == </span><span class="constant-syntax">ELSE_I6RW</span><span class="plain-syntax">)) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">)) </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> != </span><span class="constant-syntax">OPEN_BRACE_ISTT</span><span class="plain-syntax">))</span>
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|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP3_1" class="named-paragraph-link"><span class="named-paragraph">Make pre and post markers from here</span><span class="named-paragraph-number">3.1</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">changed</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">, </span><span class="identifier-syntax">rounds</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">changed</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">changed</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">; </span><span class="identifier-syntax">rounds</span><span class="plain-syntax">++;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">at</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">, *</span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax">; </span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">t</span><span class="plain-syntax">, </span><span class="identifier-syntax">t</span><span class="plain-syntax">=</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">prev</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">preinsert</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">preinsert</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">open_b</span><span class="plain-syntax"> =</span>
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<span class="plain-syntax"> </span><a href="2-is.html#SP10" class="function-link"><span class="function-syntax">InterSchemas::new_token</span></a><span class="plain-syntax">(</span><span class="constant-syntax">OPEN_BRACE_ISTT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"{"</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, -1);</span>
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|
<span class="plain-syntax"> </span><a href="2-is.html#SP14" class="function-link"><span class="function-syntax">InterSchemas::add_token_after</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">open_b</span><span class="plain-syntax">, </span><span class="identifier-syntax">prev</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">changed</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">postinsert</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">postinsert</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">close_b</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP10" class="function-link"><span class="function-syntax">InterSchemas::new_token</span></a><span class="plain-syntax">(</span><span class="constant-syntax">CLOSE_BRACE_ISTT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"}"</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, -1);</span>
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|
<span class="plain-syntax"> </span><a href="2-is.html#SP14" class="function-link"><span class="function-syntax">InterSchemas::add_token_after</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">close_b</span><span class="plain-syntax">, </span><span class="identifier-syntax">t</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">changed</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">rounds</span><span class="plain-syntax"> > </span><span class="constant-syntax">1</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NOT_APPLICABLE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
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<span class="plain-syntax">}</span>
|
|
</pre>
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<p class="commentary firstcommentary"><a id="SP3_1" class="paragraph-anchor"></a><b>§3.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Make pre and post markers from here</span><span class="named-paragraph-number">3.1</span></span><span class="comment-syntax"> =</span>
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</p>
|
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">preinsert</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">found_if</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">brl</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">posted</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">upped</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">last_n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_BRACE_ISTT</span><span class="plain-syntax">) { </span><span class="identifier-syntax">brl</span><span class="plain-syntax">++; </span><span class="identifier-syntax">upped</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_BRACE_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">brl</span><span class="plain-syntax">--;</span>
|
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">brl</span><span class="plain-syntax">++;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">brl</span><span class="plain-syntax">--;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">brl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">RESERVED_ISTT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax"> == </span><span class="constant-syntax">IF_I6RW</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">found_if</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">brl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">DIVIDER_ISTT</span><span class="plain-syntax">) ||</span>
|
|
<span class="plain-syntax"> ((</span><span class="identifier-syntax">upped</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_BRACE_ISTT</span><span class="plain-syntax">)))) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">m</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">m</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">m</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">)) </span><span class="identifier-syntax">m</span><span class="plain-syntax"> = </span><span class="identifier-syntax">m</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">found_if</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">m</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">m</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> != </span><span class="constant-syntax">RESERVED_ISTT</span><span class="plain-syntax">) ||</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">m</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax"> != </span><span class="constant-syntax">ELSE_I6RW</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">postinsert</span><span class="plain-syntax">++; </span><span class="identifier-syntax">posted</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">last_n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">posted</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">last_n</span><span class="plain-syntax">-></span><span class="element-syntax">postinsert</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP3">§3</a> (twice).</li></ul>
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|
<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>§4. The unbrace schema ramification. </b>We now remove braces used to delimit code blocks and replace them with <span class="extract"><span class="extract-syntax">CODE_ISNT</span></span>
|
|
subtrees. So for example
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> T1</span>
|
|
<span class="plain-syntax"> OPEN_BRACE_ISTT</span>
|
|
<span class="plain-syntax"> T2</span>
|
|
<span class="plain-syntax"> T3</span>
|
|
<span class="plain-syntax"> CLOSE_BRACE_ISTT</span>
|
|
<span class="plain-syntax"> T4</span>
|
|
</pre>
|
|
<p class="commentary">becomes
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> T1</span>
|
|
<span class="plain-syntax"> CODE_ISNT</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> T2</span>
|
|
<span class="plain-syntax"> T3</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> T4</span>
|
|
</pre>
|
|
<p class="commentary">In this way, all matching pairs of <span class="extract"><span class="extract-syntax">OPEN_BRACE_ISTT</span></span> and <span class="extract"><span class="extract-syntax">CLOSE_BRACE_ISTT</span></span> tokens
|
|
are removed.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::unbrace_schema</span><button class="popup" onclick="togglePopup('usagePopup3')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup3">Usage of <span class="code-font"><span class="function-syntax">Ramification::unbrace_schema</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">, *</span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">t</span><span class="plain-syntax">; </span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">t</span><span class="plain-syntax">, </span><span class="identifier-syntax">t</span><span class="plain-syntax">=</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">prev</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_BRACE_ISTT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prev</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">code_isn</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">CODE_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">code_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">code_isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">code_isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">code_isn</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">t</span><span class="plain-syntax">; </span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="identifier-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">t</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">)) { </span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">t</span><span class="plain-syntax">; </span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">; }</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">t</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">, *</span><span class="identifier-syntax">pn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">brl</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_BRACE_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">brl</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_BRACE_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">brl</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">brl</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">brl</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">owner</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">brl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">pn</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">pn</span><span class="plain-syntax">-></span><span class="identifier-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">pn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">; </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">resumed</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">resumed</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">resumed</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">resumed</span><span class="plain-syntax"> = </span><span class="identifier-syntax">resumed</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">resumed</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">resumed</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="identifier-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="identifier-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">saved</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP4" class="function-link"><span class="function-syntax">Ramification::unbrace_schema</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP5" class="paragraph-anchor"></a><b>§5. The divide schema ramification. </b>A <span class="extract"><span class="extract-syntax">DIVIDER_ISTT</span></span> token represents a semicolon used to divide I6 statements.
|
|
We want to represent them, however, by independent subtrees. So:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> T1</span>
|
|
<span class="plain-syntax"> T2</span>
|
|
<span class="plain-syntax"> DIVIDER_ISTT</span>
|
|
<span class="plain-syntax"> T3</span>
|
|
<span class="plain-syntax"> T4</span>
|
|
<span class="plain-syntax"> DIVIDER_ISTT</span>
|
|
</pre>
|
|
<p class="commentary">becomes
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> T1</span>
|
|
<span class="plain-syntax"> T2</span>
|
|
<span class="plain-syntax"> DIVIDER_ISTT</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> T3</span>
|
|
<span class="plain-syntax"> T4</span>
|
|
<span class="plain-syntax"> DIVIDER_ISTT</span>
|
|
</pre>
|
|
<p class="commentary">After this stage, therefore, each statement occupies its own <span class="extract"><span class="extract-syntax">EXPRESSION_ISNT</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::divide_schema</span><button class="popup" onclick="togglePopup('usagePopup4')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup4">Usage of <span class="code-font"><span class="function-syntax">Ramification::divide_schema</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">; </span><span class="identifier-syntax">t</span><span class="plain-syntax">; </span><span class="identifier-syntax">t</span><span class="plain-syntax">=</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="identifier-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">DIVIDER_ISTT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">saved</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP5" class="function-link"><span class="function-syntax">Ramification::divide_schema</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP6" class="paragraph-anchor"></a><b>§6. The undivide schema ramification. </b>The expression nodes for statements now tend to end with <span class="extract"><span class="extract-syntax">DIVIDER_ISTT</span></span> tokens
|
|
which no longer have any useful meaning. We remove them. For example:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> T1</span>
|
|
<span class="plain-syntax"> T2</span>
|
|
<span class="plain-syntax"> DIVIDER_ISTT</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> T3</span>
|
|
<span class="plain-syntax"> T4</span>
|
|
<span class="plain-syntax"> DIVIDER_ISTT</span>
|
|
</pre>
|
|
<p class="commentary">becomes
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> T1</span>
|
|
<span class="plain-syntax"> T2</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> T3</span>
|
|
<span class="plain-syntax"> T4</span>
|
|
</pre>
|
|
<p class="commentary">After this, then, there are no further <span class="extract"><span class="extract-syntax">DIVIDER_ISTT</span></span> tokens in the tree.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::undivide_schema</span><button class="popup" onclick="togglePopup('usagePopup5')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup5">Usage of <span class="code-font"><span class="function-syntax">Ramification::undivide_schema</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">rv</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">t</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">DIVIDER_ISTT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">semicolon_terminated</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">rv</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">t</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">DIVIDER_ISTT</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">semicolon_terminated</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="identifier-syntax">rv</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP6" class="function-link"><span class="function-syntax">Ramification::undivide_schema</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="identifier-syntax">rv</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">rv</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP7" class="paragraph-anchor"></a><b>§7. The resolve halfopen blocks ramification. </b>At this point, all matching pairs of open and close braces have been removed.
|
|
But that doesn't quite solve the problem of code blocks, because an inline
|
|
phrase in Inform 7 can use the notations <span class="extract"><span class="extract-syntax">{-open-brace}</span></span> or <span class="extract"><span class="extract-syntax">{-close-brace}</span></span>
|
|
to indicate that a code block must be opened or closed, in a way which does
|
|
not pair up.
|
|
</p>
|
|
|
|
<p class="commentary">There is clearly no way for a tree structure to encode a half-open subtree,
|
|
so the schema itself has to have a special annotation made in this case, which
|
|
is done by calling <a href="2-is.html#SP5" class="internal">InterSchemas::mark_unclosed</a> or <a href="2-is.html#SP6" class="internal">InterSchemas::mark_unopened</a>.
|
|
It is inconvenient to delete the brace command node (we might end up with an
|
|
empty <span class="extract"><span class="extract-syntax">EXPRESSION_ISNT</span></span> list), so instead we convert it to a harmless piece
|
|
of white space.
|
|
</p>
|
|
|
|
<p class="commentary">At the end of this process, then, all code blocks are correctly handled, and
|
|
all statements are held as single <span class="extract"><span class="extract-syntax">EXPRESSION_ISNT</span></span> nodes. So the coarse
|
|
structure of the code is correctly handled — we have a clear tree structure
|
|
of statements (or expressions), hierarchically arranged in code blocks.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::resolve_halfopen_blocks</span><button class="popup" onclick="togglePopup('usagePopup6')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup6">Usage of <span class="code-font"><span class="function-syntax">Ramification::resolve_halfopen_blocks</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">t</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">)) </span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">t</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">INLINE_ISTT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">inline_command</span><span class="plain-syntax"> == </span><span class="constant-syntax">open_brace_ISINC</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP5" class="function-link"><span class="function-syntax">InterSchemas::mark_unclosed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">" "</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">t</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">INLINE_ISTT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">inline_command</span><span class="plain-syntax"> == </span><span class="constant-syntax">close_brace_ISINC</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP6" class="function-link"><span class="function-syntax">InterSchemas::mark_unopened</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">" "</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax"> = </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">saved</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP7" class="function-link"><span class="function-syntax">Ramification::resolve_halfopen_blocks</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8" class="paragraph-anchor"></a><b>§8. The break early bracings ramification. </b>If an expression list begins with one or more braced commands, perhaps with some
|
|
white space, and then continues with some honest I6 material, we divide the
|
|
early commands off from the subsequent matter. Thus:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> INLINE_ISTT</span>
|
|
<span class="plain-syntax"> WHITE_SPACE_ISTT</span>
|
|
<span class="plain-syntax"> INLINE_ISTT</span>
|
|
<span class="plain-syntax"> WHITE_SPACE_ISTT</span>
|
|
<span class="plain-syntax"> T1</span>
|
|
<span class="plain-syntax"> T2</span>
|
|
<span class="plain-syntax"> T3</span>
|
|
</pre>
|
|
<p class="commentary">becomes
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> INLINE_ISTT</span>
|
|
<span class="plain-syntax"> WHITE_SPACE_ISTT</span>
|
|
<span class="plain-syntax"> INLINE_ISTT</span>
|
|
<span class="plain-syntax"> WHITE_SPACE_ISTT</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> T1</span>
|
|
<span class="plain-syntax"> T2</span>
|
|
<span class="plain-syntax"> T3</span>
|
|
</pre>
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::break_early_bracings</span><button class="popup" onclick="togglePopup('usagePopup7')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup7">Usage of <span class="code-font"><span class="function-syntax">Ramification::break_early_bracings</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">m</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP8" class="function-link"><span class="function-syntax">Ramification::permitted_early</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">m</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">m</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">RESERVED_ISTT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">saved</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">m</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP8" class="function-link"><span class="function-syntax">Ramification::break_early_bracings</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::permitted_early</span><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">INLINE_ISTT</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP9" class="paragraph-anchor"></a><b>§9. The strip leading white space ramification. </b>If an expression begins with white space, remove it. (This makes coding subsequent
|
|
ramifications easier — because we can assume the first token is substantive.)
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::strip_leading_white_space</span><button class="popup" onclick="togglePopup('usagePopup8')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup8">Usage of <span class="code-font"><span class="function-syntax">Ramification::strip_leading_white_space</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">t</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP9" class="function-link"><span class="function-syntax">Ramification::strip_leading_white_space</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP10" class="paragraph-anchor"></a><b>§10. The split switches into cases ramification. </b>Unlike most C-like languages, Inform 6 does not have a <span class="extract"><span class="extract-syntax">case</span></span> reserved word to
|
|
introduce cases in a <span class="extract"><span class="extract-syntax">switch</span></span> statement. For example:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax"> (</span><span class="identifier-syntax">x</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="constant-syntax">2</span><span class="plain-syntax">, </span><span class="constant-syntax">3</span><span class="plain-syntax">: </span><span class="reserved-syntax">print</span><span class="plain-syntax"> </span><span class="string-syntax">"Do one thing."</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="constant-syntax">4</span><span class="plain-syntax">: </span><span class="reserved-syntax">print</span><span class="plain-syntax"> </span><span class="string-syntax">"Do a different thing."</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">default</span><span class="plain-syntax">: </span><span class="reserved-syntax">print</span><span class="plain-syntax"> </span><span class="string-syntax">"Otherwise, do this other thing."</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<p class="commentary">Here, the colons and the reserved word <span class="extract"><span class="extract-syntax">default</span></span> are the important syntactic markers.
|
|
We break this up as three code blocks:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> STATEMENT_ISNT "case"</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> 1</span>
|
|
<span class="plain-syntax"> COMMA_ISTT</span>
|
|
<span class="plain-syntax"> WHITE_SPACE_ISTT</span>
|
|
<span class="plain-syntax"> 2</span>
|
|
<span class="plain-syntax"> COMMA_ISTT</span>
|
|
<span class="plain-syntax"> WHITE_SPACE_ISTT</span>
|
|
<span class="plain-syntax"> 3</span>
|
|
<span class="plain-syntax"> CODE_ISNT</span>
|
|
<span class="plain-syntax"> ...</span>
|
|
<span class="plain-syntax"> STATEMENT_ISNT "case"</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> 4</span>
|
|
<span class="plain-syntax"> CODE_ISNT</span>
|
|
<span class="plain-syntax"> ...</span>
|
|
<span class="plain-syntax"> STATEMENT_ISNT "default"</span>
|
|
<span class="plain-syntax"> CODE_ISNT</span>
|
|
<span class="plain-syntax"> ...</span>
|
|
</pre>
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::split_switches_into_cases</span><button class="popup" onclick="togglePopup('usagePopup9')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup9">Usage of <span class="code-font"><span class="function-syntax">Ramification::split_switches_into_cases</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">, *</span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">COLON_ISTT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">original_child</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">defaulter</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">) &&</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">RESERVED_ISTT</span><span class="plain-syntax">) &&</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax"> == </span><span class="constant-syntax">DEFAULT_I6RW</span><span class="plain-syntax">)) </span><span class="identifier-syntax">defaulter</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sw_val</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sw_code</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">defaulter</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">sw_code</span><span class="plain-syntax"> = </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">CODE_ISNT</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sw_code</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">sw_code</span><span class="plain-syntax">-></span><span class="identifier-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">sw_val</span><span class="plain-syntax"> = </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">sw_code</span><span class="plain-syntax"> = </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">CODE_ISNT</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">sw_val</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sw_code</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">sw_val</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sw_val</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">sw_code</span><span class="plain-syntax">-></span><span class="identifier-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">switch_begins</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">switch_ends</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">pn</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">pn</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax">) &&</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">pn</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">RESERVED_ISTT</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">pn</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax"> == </span><span class="constant-syntax">SWITCH_I6RW</span><span class="plain-syntax">)) {</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">switch_begins</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pn2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">pn2</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">pn2</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) { </span><span class="identifier-syntax">switch_ends</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">; }</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">pn2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">pn2</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">pn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">pn</span><span class="plain-syntax">-></span><span class="identifier-syntax">parent_node</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">switch_ends</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) </span><a href="2-is.html#SP5" class="function-link"><span class="function-syntax">InterSchemas::mark_unclosed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sw_code</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">switch_begins</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) </span><a href="2-is.html#SP7" class="function-link"><span class="function-syntax">InterSchemas::mark_case_closed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">sw_val</span><span class="plain-syntax">) </span><span class="identifier-syntax">sw_val</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">prev</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">STATEMENT_ISNT</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">defaulter</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> = </span><span class="constant-syntax">DEFAULT_BIP</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> = </span><span class="constant-syntax">CASE_BIP</span><span class="plain-syntax">;</span>
|
|
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sw_code_exp</span><span class="plain-syntax"> =</span>
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|
<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sw_code_exp</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sw_code</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sw_code_exp</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sw_code_exp</span><span class="plain-syntax">-></span><span class="identifier-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sw_code</span><span class="plain-syntax">;</span>
|
|
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|
<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sw_val</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sw_code_exp</span><span class="plain-syntax">);</span>
|
|
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">sw_code_exp</span><span class="plain-syntax">-></span><span class="identifier-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">original_child</span><span class="plain-syntax">;</span>
|
|
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">at</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">attach</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sw_code_exp</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">at</span><span class="plain-syntax">) && (</span><a href="2-rmf.html#SP11" class="function-link"><span class="function-syntax">Ramification::casey</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">at</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">next_at</span><span class="plain-syntax"> = </span><span class="identifier-syntax">at</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sw_code</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">attach</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">at</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">attach</span><span class="plain-syntax"> = </span><span class="identifier-syntax">at</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">next_at</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> = </span><span class="identifier-syntax">next_at</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">; </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="identifier-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP10" class="function-link"><span class="function-syntax">Ramification::split_switches_into_cases</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
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|
<p class="commentary firstcommentary"><a id="SP11" class="paragraph-anchor"></a><b>§11. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::casey</span><button class="popup" onclick="togglePopup('usagePopup10')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup10">Usage of <span class="code-font"><span class="function-syntax">Ramification::casey</span></span>:<br/><a href="2-rmf.html#SP10">§10</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">COLON_ISTT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP12" class="paragraph-anchor"></a><b>§12. The split print statements ramification. </b>Inform 6 supports composite print statements, like so:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">print_ret</span><span class="plain-syntax"> </span><span class="string-syntax">"X is "</span><span class="plain-syntax">, </span><span class="identifier-syntax">x</span><span class="plain-syntax">, </span><span class="string-syntax">"."</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<p class="commentary">This example currently looks like:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> RESERVED_ISTT "print_ret"</span>
|
|
<span class="plain-syntax"> WHITE_SPACE_ISTT</span>
|
|
<span class="plain-syntax"> DQUOTED_ISTT "X is "</span>
|
|
<span class="plain-syntax"> COMMA_ISTT</span>
|
|
<span class="plain-syntax"> WHITE_SPACE_ISTT</span>
|
|
<span class="plain-syntax"> IDENTIFIER_ISTT "x"</span>
|
|
<span class="plain-syntax"> COMMA_ISTT</span>
|
|
<span class="plain-syntax"> WHITE_SPACE_ISTT</span>
|
|
<span class="plain-syntax"> DQUOTED_ISTT "."</span>
|
|
</pre>
|
|
<p class="commentary">We break this up as three individual prints:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> RESERVED_ISTT "print"</span>
|
|
<span class="plain-syntax"> WHITE_SPACE_ISTT</span>
|
|
<span class="plain-syntax"> DQUOTED_ISTT "X is "</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> RESERVED_ISTT "print"</span>
|
|
<span class="plain-syntax"> WHITE_SPACE_ISTT</span>
|
|
<span class="plain-syntax"> IDENTIFIER_ISTT "x"</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> RESERVED_ISTT "print_ret"</span>
|
|
<span class="plain-syntax"> WHITE_SPACE_ISTT</span>
|
|
<span class="plain-syntax"> DQUOTED_ISTT "."</span>
|
|
</pre>
|
|
<p class="commentary">Note that, for obvious reasons, in the <span class="extract"><span class="extract-syntax">print_ret</span></span> case only the third of the
|
|
prints should perform a return.
|
|
</p>
|
|
|
|
<p class="commentary">The point of this stage is to get rid of one source of <span class="extract"><span class="extract-syntax">COMMA_ISTT</span></span> tokens;
|
|
commas can mean a number of different things in Inform 6 syntax and it makes
|
|
our work simpler to take one of those meanings out of the picture.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::split_print_statements</span><button class="popup" onclick="togglePopup('usagePopup11')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup11">Usage of <span class="code-font"><span class="function-syntax">Ramification::split_print_statements</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">RESERVED_ISTT</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> && ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax"> == </span><span class="constant-syntax">PRINT_I6RW</span><span class="plain-syntax">) ||</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax"> == </span><span class="constant-syntax">PRINTRET_I6RW</span><span class="plain-syntax">))) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">, *</span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">COMMA_ISTT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prev</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">RESERVED_ISTT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax"> = </span><span class="constant-syntax">PRINT_I6RW</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"print"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">reserved_word</span><span class="plain-syntax"> == </span><span class="constant-syntax">PRINT_I6RW</span><span class="plain-syntax">) </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"print"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"print_ret"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="identifier-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="identifier-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">saved</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="identifier-syntax">semicolon_terminated</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">semicolon_terminated</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">; </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP12" class="function-link"><span class="function-syntax">Ramification::split_print_statements</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP13" class="paragraph-anchor"></a><b>§13. The identify constructs ramification. </b>At this point each individual expression or statement is represented by the
|
|
tokens under an <span class="extract"><span class="extract-syntax">EXPRESSION_ISNT</span></span> node. It's legal to give an expression as
|
|
a statement in Inform 6, i.e., in void context, just as it is in C. But we
|
|
can tell the difference because statements are introduced by reserved words
|
|
such as <span class="extract"><span class="extract-syntax">while</span></span>; and this is where we do that.
|
|
</p>
|
|
|
|
<p class="commentary">Here <span class="extract"><span class="extract-syntax">par</span></span> is the parent node, and <span class="extract"><span class="extract-syntax">cons</span></span> the construct, presumably an <span class="extract"><span class="extract-syntax">EXPRESSION_ISNT</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::identify_constructs</span><button class="popup" onclick="togglePopup('usagePopup12')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup12">Usage of <span class="code-font"><span class="function-syntax">Ramification::identify_constructs</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">cons</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; </span><span class="identifier-syntax">cons</span><span class="plain-syntax">; </span><span class="identifier-syntax">cons</span><span class="plain-syntax">=</span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">first</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::first_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">first</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">dangle_number</span><span class="plain-syntax"> = -1;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">dangle_text</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">operand1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, *</span><span class="identifier-syntax">operand2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">operand2_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax"> (</span><span class="identifier-syntax">first</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">RESERVED_ISTT:</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_1" class="named-paragraph-link"><span class="named-paragraph">If this expression opens with a reserved word, it may be a statement</span><span class="named-paragraph-number">13.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">DIRECTIVE_ISTT:</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_2" class="named-paragraph-link"><span class="named-paragraph">If this expression opens with a directive keyword, it is a directive</span><span class="named-paragraph-number">13.2</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">OPCODE_ISTT:</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_3" class="named-paragraph-link"><span class="named-paragraph">If this expression opens with an opcode keyword, it is an assembly line</span><span class="named-paragraph-number">13.3</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">which_statement</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_4" class="named-paragraph-link"><span class="named-paragraph">Make this a STATEMENT_ISNT node</span><span class="named-paragraph-number">13.4</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> != </span><span class="constant-syntax">ASSEMBLY_ISNT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> != </span><span class="constant-syntax">DIRECTIVE_ISNT</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP13" class="function-link"><span class="function-syntax">Ramification::identify_constructs</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">, </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP13_1" class="paragraph-anchor"></a><b>§13.1. </b>To have the node converted from <span class="extract"><span class="extract-syntax">EXPRESSION_ISNT</span></span> to <span class="extract"><span class="extract-syntax">STATEMENT_ISNT</span></span>, we must
|
|
set <span class="extract"><span class="extract-syntax">which_statement</span></span> to the BIP of the Inter primitive which will implement it.
|
|
If we set <span class="extract"><span class="extract-syntax">dangle_number</span></span> to some non-negative value, then that will be added
|
|
as an argument. Thus:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> rfalse</span>
|
|
</pre>
|
|
<p class="commentary">becomes:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> STATEMENT_ISNT - RETURN_BIP</span>
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|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
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|
<span class="plain-syntax"> 0</span>
|
|
</pre>
|
|
<p class="commentary">The <span class="extract"><span class="extract-syntax">0</span></span> is an invention — in that it never occurs in the original text — and
|
|
its expression dangles beneath the <span class="extract"><span class="extract-syntax">STATEMENT_ISNT</span></span> node; and similarly for
|
|
a <span class="extract"><span class="extract-syntax">dangle_text</span></span>, of course.
|
|
</p>
|
|
|
|
<p class="commentary">The set of Inform 6 statements is a mixed bag, to put it mildly, and some have
|
|
oddball syntaxes. Here goes:
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|
</p>
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|
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">If this expression opens with a reserved word, it may be a statement</span><span class="named-paragraph-number">13.1</span></span><span class="comment-syntax"> =</span>
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|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax"> (</span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::opening_reserved_word</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">)) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">BREAK_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">BREAK_BIP</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">CONTINUE_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">CONTINUE_BIP</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">DO_I6RW:</span><span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_1_1" class="named-paragraph-link"><span class="named-paragraph">This is a do statement</span><span class="named-paragraph-number">13.1.1</span></a></span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">FONT_I6RW:</span><span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_1_2" class="named-paragraph-link"><span class="named-paragraph">This is a font statement</span><span class="named-paragraph-number">13.1.2</span></a></span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">FOR_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">FOR_BIP</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">GIVE_I6RW:</span><span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_1_3" class="named-paragraph-link"><span class="named-paragraph">This is a give statement</span><span class="named-paragraph-number">13.1.3</span></a></span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">IF_I6RW:</span><span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_1_4" class="named-paragraph-link"><span class="named-paragraph">This is an if statement</span><span class="named-paragraph-number">13.1.4</span></a></span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">INVERSION_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">PRINT_BIP</span><span class="plain-syntax">; </span><span class="identifier-syntax">dangle_text</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"v6"</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">JUMP_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">JUMP_BIP</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">MOVE_I6RW:</span><span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_1_5" class="named-paragraph-link"><span class="named-paragraph">This is a move statement</span><span class="named-paragraph-number">13.1.5</span></a></span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">NEWLINE_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">PRINT_BIP</span><span class="plain-syntax">; </span><span class="identifier-syntax">dangle_text</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"\n"</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">OBJECTLOOP_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">OBJECTLOOP_BIP</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">PRINT_I6RW:</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">PRINTRET_I6RW:</span><span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_1_7" class="named-paragraph-link"><span class="named-paragraph">This is a print statement</span><span class="named-paragraph-number">13.1.7</span></a></span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">QUIT_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">QUIT_BIP</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">READ_I6RW:</span><span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_1_8" class="named-paragraph-link"><span class="named-paragraph">This is a read statement</span><span class="named-paragraph-number">13.1.8</span></a></span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">REMOVE_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">REMOVE_BIP</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">RESTORE_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">RESTORE_BIP</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">RETURN_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">RETURN_BIP</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">RFALSE_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">RETURN_BIP</span><span class="plain-syntax">; </span><span class="identifier-syntax">dangle_number</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">RTRUE_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">RETURN_BIP</span><span class="plain-syntax">; </span><span class="identifier-syntax">dangle_number</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">SPACES_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">SPACES_BIP</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">STYLE_I6RW:</span><span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_1_6" class="named-paragraph-link"><span class="named-paragraph">This is a style statement</span><span class="named-paragraph-number">13.1.6</span></a></span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">SWITCH_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">SWITCH_BIP</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">WHILE_I6RW:</span><span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">WHILE_BIP</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13">§13</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP13_1_1" class="paragraph-anchor"></a><b>§13.1.1. </b>The Inform 6 syntax <span class="extract"><span class="extract-syntax">do ...; until ...;</span></span> currently appears as two consecutive
|
|
nodes, which we want to fold into just one:
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">This is a do statement</span><span class="named-paragraph-number">13.1.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">until_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::opening_reserved_word</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">until_node</span><span class="plain-syntax">) == </span><span class="constant-syntax">UNTIL_I6RW</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">DO_BIP</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand1</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::second_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">until_node</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">until_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"do without until"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13_1">§13.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP13_1_2" class="paragraph-anchor"></a><b>§13.1.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">This is a font statement</span><span class="named-paragraph-number">13.1.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">FONT_BIP</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::second_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"on"</span><span class="plain-syntax">))) </span><span class="identifier-syntax">dangle_number</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"off"</span><span class="plain-syntax">))) </span><span class="identifier-syntax">dangle_number</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">msg</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">msg</span><span class="plain-syntax">, </span><span class="string-syntax">"expected 'on' or 'off' after 'font', not '%S'"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">, </span><span class="identifier-syntax">msg</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">msg</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13_1">§13.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP13_1_3" class="paragraph-anchor"></a><b>§13.1.3. </b>Here <span class="extract"><span class="extract-syntax">give O P</span></span> sets attribute <span class="extract"><span class="extract-syntax">P</span></span> for object <span class="extract"><span class="extract-syntax">O</span></span>, and <span class="extract"><span class="extract-syntax">give O ~P</span></span> takes
|
|
it away again; this looks like a use of the bitwise-not operator but is not.
|
|
</p>
|
|
|
|
<p class="commentary">There is actually no statement node corresponding to <span class="extract"><span class="extract-syntax">STORE_BIP</span></span>; that's
|
|
just a device to be picked up below.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">This is a give statement</span><span class="named-paragraph-number">13.1.3</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand1</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::second_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::next_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">operand1</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPERATOR_ISTT</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">operation_primitive</span><span class="plain-syntax"> == </span><span class="constant-syntax">BITWISENOT_BIP</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">STORE_BIP</span><span class="plain-syntax">; </span><span class="identifier-syntax">dangle_number</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand2</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::next_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">STORE_BIP</span><span class="plain-syntax">; </span><span class="identifier-syntax">dangle_number</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13_1">§13.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP13_1_4" class="paragraph-anchor"></a><b>§13.1.4. </b>Here Inform 6 might use <span class="extract"><span class="extract-syntax">if ...; else ...;</span></span>, or might not have the <span class="extract"><span class="extract-syntax">else</span></span>
|
|
clause at all. We split these possibilities into two different statement nodes.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">This is an if statement</span><span class="named-paragraph-number">13.1.4</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">IF_BIP</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand1</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::second_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">else_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::opening_reserved_word</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">else_node</span><span class="plain-syntax">) == </span><span class="constant-syntax">ELSE_I6RW</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">else_node</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand2</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::first_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">else_node</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">operand2</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">IFELSE_BIP</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand2_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">else_node</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">else_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13_1">§13.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP13_1_5" class="paragraph-anchor"></a><b>§13.1.5. </b>The syntax here is <span class="extract"><span class="extract-syntax">move ... to ...</span></span>, where the keyword <span class="extract"><span class="extract-syntax">to</span></span> is compulsory.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">This is a move statement</span><span class="named-paragraph-number">13.1.5</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand1</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::second_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">operand1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">to</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">to</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"to"</span><span class="plain-syntax">)) </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::next_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">to</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">to</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"move without to"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand2</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::next_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">to</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">" "</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">operand1</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">operand2</span><span class="plain-syntax">)) </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">MOVE_BIP</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13_1">§13.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP13_1_6" class="paragraph-anchor"></a><b>§13.1.6. </b>Inform 6 in fact only supports <span class="extract"><span class="extract-syntax">style</span></span> followed by one of these four keywords,
|
|
but we are extending it to allow for more interesting stylistics when away from
|
|
the traditional IF virtual machines. So we will allow <span class="extract"><span class="extract-syntax">style X</span></span>, where <span class="extract"><span class="extract-syntax">X</span></span> is
|
|
anything else, too.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">This is a style statement</span><span class="named-paragraph-number">13.1.6</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::second_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">STYLE_BIP</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"roman"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">dangle_number</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"bold"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">dangle_number</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"underline"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">dangle_number</span><span class="plain-syntax"> = </span><span class="constant-syntax">2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"reverse"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">dangle_number</span><span class="plain-syntax"> = </span><span class="constant-syntax">3</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13_1">§13.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP13_1_7" class="paragraph-anchor"></a><b>§13.1.7. </b>Note that composite print statements have already been broken up, so that
|
|
we only have three possibilities:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">print</span><span class="plain-syntax"> </span><span class="identifier-syntax">some_number</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">print</span><span class="plain-syntax"> </span><span class="string-syntax">"Some text"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">print</span><span class="plain-syntax"> (</span><span class="identifier-syntax">some_rule</span><span class="plain-syntax">) </span><span class="identifier-syntax">some_value</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<p class="commentary">(or the same but with <span class="extract"><span class="extract-syntax">print_ret</span></span> instead of <span class="extract"><span class="extract-syntax">print</span></span>). The first two cases
|
|
are straightforward and become usages of <span class="extract"><span class="extract-syntax">PRINTNUMBER_BIP</span></span> or <span class="extract"><span class="extract-syntax">PRINT_BIP</span></span>
|
|
respectively.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">This is a print statement</span><span class="named-paragraph-number">13.1.7</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">uses_printing_rule_in_brackets_notation</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">PRINTNUMBER_BIP</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::second_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::next_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">printing_rule</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">printing_rule</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::next_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::next_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">uses_printing_rule_in_brackets_notation</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_1_7_1" class="named-paragraph-link"><span class="named-paragraph">This uses the printing-rule-in-brackets notation</span><span class="named-paragraph-number">13.1.7.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">uses_printing_rule_in_brackets_notation</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::second_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">DQUOTED_ISTT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">PRINT_BIP</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="2-tkn.html#SP2" class="function-link"><span class="function-syntax">Tokenisation::de_escape_text</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::opening_reserved_word</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">) == </span><span class="constant-syntax">PRINTRET_I6RW</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_1_7_2" class="named-paragraph-link"><span class="named-paragraph">Add printing a newline and returning true to the schema</span><span class="named-paragraph-number">13.1.7.2</span></a></span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13_1">§13.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP13_1_7_1" class="paragraph-anchor"></a><b>§13.1.7.1. </b>The printing rule given in brackets can be one of 13 special cases, or else
|
|
can be the name of some function. All but 4 of these special cases will be
|
|
turned into function calls too, leaving:
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">This uses the printing-rule-in-brackets notation</span><span class="named-paragraph-number">13.1.7.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">printing_rule</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"address"</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">PRINTDWORD_BIP</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">printing_rule</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"char"</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">PRINTCHAR_BIP</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">printing_rule</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"string"</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">PRINTSTRING_BIP</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">printing_rule</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"object"</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">PRINTOBJ_BIP</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_1_7_1_1" class="named-paragraph-link"><span class="named-paragraph">Convert this to a function call</span><span class="named-paragraph-number">13.1.7.1.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13_1_7">§13.1.7</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP13_1_7_1_1" class="paragraph-anchor"></a><b>§13.1.7.1.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Convert this to a function call</span><span class="named-paragraph-number">13.1.7.1.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">fn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">printing_rule</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">fn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"the"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">fn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"DefArt"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">fn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"The"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">fn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"CDefArt"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">fn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"a"</span><span class="plain-syntax">)) || (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">fn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"an"</span><span class="plain-syntax">))) </span><span class="identifier-syntax">fn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"IndefArt"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">fn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"A"</span><span class="plain-syntax">)) || (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">fn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"An"</span><span class="plain-syntax">))) </span><span class="identifier-syntax">fn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"CIndefArt"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">fn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"number"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">fn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"LanguageNumber"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">fn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"name"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">fn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"PrintShortName"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">fn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"property"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">fn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"DebugProperty"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">printing_rule</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax"> = </span><span class="identifier-syntax">fn</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">printing_rule</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">open_b</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP10" class="function-link"><span class="function-syntax">InterSchemas::new_token</span></a><span class="plain-syntax">(</span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"("</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, -1);</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP14" class="function-link"><span class="function-syntax">InterSchemas::add_token_after</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">open_b</span><span class="plain-syntax">, </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">open_b</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">open_b</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">)) </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">close_b</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP10" class="function-link"><span class="function-syntax">InterSchemas::new_token</span></a><span class="plain-syntax">(</span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">")"</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, -1);</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP14" class="function-link"><span class="function-syntax">InterSchemas::add_token_after</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">close_b</span><span class="plain-syntax">, </span><span class="identifier-syntax">n</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13_1_7_1">§13.1.7.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP13_1_7_2" class="paragraph-anchor"></a><b>§13.1.7.2. </b>This is the difference between a <span class="extract"><span class="extract-syntax">print</span></span> and a <span class="extract"><span class="extract-syntax">print_ret</span></span>: the latter
|
|
gets two additional statement nodes added after it, one to print a newline
|
|
character, and one to return <span class="extract"><span class="extract-syntax">true</span></span>.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Add printing a newline and returning true to the schema</span><span class="named-paragraph-number">13.1.7.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">save_next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">next_node</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">STATEMENT_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> = </span><span class="constant-syntax">PRINT_BIP</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">-></span><span class="identifier-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP14" class="function-link"><span class="function-syntax">InterSchemas::add_token_to_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP10" class="function-link"><span class="function-syntax">InterSchemas::new_token</span></a><span class="plain-syntax">(</span><span class="constant-syntax">DQUOTED_ISTT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"\n"</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, -1));</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">STATEMENT_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> = </span><span class="constant-syntax">RETURN_BIP</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">save_next</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13_1_7">§13.1.7</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP13_1_8" class="paragraph-anchor"></a><b>§13.1.8. </b><span class="extract"><span class="extract-syntax">read</span></span> is an awkward sod of a statement because of the way it is handled
|
|
differently on 16-bit vs 32-bit platforms. <span class="extract"><span class="extract-syntax">READ_XBIP</span></span> is a sort of placeholder
|
|
for worrying about this only later; it means that this schema does not need
|
|
to know about the difference.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">This is a read statement</span><span class="named-paragraph-number">13.1.8</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand1</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::second_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand2</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::next_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">operand1</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand1</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand2</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">operand1</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">operand2</span><span class="plain-syntax">)) </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">READ_XBIP</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13_1">§13.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP13_2" class="paragraph-anchor"></a><b>§13.2. </b>Directives are much easier. For example,
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> #ifdef</span>
|
|
<span class="plain-syntax"> DEBUG</span>
|
|
</pre>
|
|
<p class="commentary">becomes
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> DIRECTIVE_ISNT = #IFDEF</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> DEBUG</span>
|
|
</pre>
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">If this expression opens with a directive keyword, it is a directive</span><span class="named-paragraph-number">13.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
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|
<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">isn_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">DIRECTIVE_ISNT</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">dir_clarifier</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::opening_directive_word</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::second_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax"> =</span>
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<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">cons</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::second_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13">§13</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP13_3" class="paragraph-anchor"></a><b>§13.3. </b>Assembly language is basically simple, but with a couple of wrinkles:
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</p>
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<ul class="items"><li>(a) <span class="extract"><span class="extract-syntax">@push</span></span> and <span class="extract"><span class="extract-syntax">@pull</span></span> are converted to Inter statement nodes;
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</li><li>(b) we must be careful about unary minus signs, in <span class="extract"><span class="extract-syntax">@hypothetical -1</span></span>,
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which would be tokenised as <span class="extract"><span class="extract-syntax">@hypothetical - 1</span></span>;
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</li><li>(c) the special notations <span class="extract"><span class="extract-syntax">sp</span></span> (stack pointer), <span class="extract"><span class="extract-syntax">-></span></span> and <span class="extract"><span class="extract-syntax">?labelname</span></span> need
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to be recognised for what they are.
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</li></ul>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">If this expression opens with an opcode keyword, it is an assembly line</span><span class="named-paragraph-number">13.3</span></span><span class="comment-syntax"> =</span>
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">f</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::first_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">f</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"@push"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">PUSH_BIP</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">f</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"@pull"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> = </span><span class="constant-syntax">PULL_BIP</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">ASSEMBLY_ISNT</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prev_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">l</span><span class="plain-syntax"> = </span><span class="identifier-syntax">f</span><span class="plain-syntax">, *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">l</span><span class="plain-syntax">?(</span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">):</span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">l</span><span class="plain-syntax">; </span><span class="identifier-syntax">l</span><span class="plain-syntax">=</span><span class="identifier-syntax">n</span><span class="plain-syntax">, </span><span class="identifier-syntax">n</span><span class="plain-syntax">=</span><span class="identifier-syntax">n</span><span class="plain-syntax">?(</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">):</span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> != </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax"> =</span>
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<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">l</span><span class="plain-syntax">; </span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">owner</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">operation_primitive</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">IDENTIFIER_ISTT</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">operation_primitive</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"-"</span><span class="plain-syntax">))) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::new</span><span class="plain-syntax">();</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="string-syntax">"-%S"</span><span class="plain-syntax">, </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">NUMBER_ISTT</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"->"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">ASM_ARROW_ISTT</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"sp"</span><span class="plain-syntax">)) </span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">ASM_SP_ISTT</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"?"</span><span class="plain-syntax">)) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">ASM_LABEL_ISTT</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"~"</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">ASM_NEGATED_LABEL_ISTT</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">prev_node</span><span class="plain-syntax">) </span><span class="identifier-syntax">prev_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">cons</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">prev_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13">§13</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP13_4" class="paragraph-anchor"></a><b>§13.4. </b>Finally! In the case where we do want to make a <span class="extract"><span class="extract-syntax">STATEMENT_ISNT</span></span> node —
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either through recognising an I6 statement word like <span class="extract"><span class="extract-syntax">while</span></span>, or one of the
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assembly instructions <span class="extract"><span class="extract-syntax">@push</span></span> or <span class="extract"><span class="extract-syntax">@pull</span></span> — we do the following.
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</p>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Make this a STATEMENT_ISNT node</span><span class="named-paragraph-number">13.4</span></span><span class="comment-syntax"> =</span>
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</p>
|
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<pre class="displayed-code all-displayed-code code-font">
|
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<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">isn_clarifier</span><span class="plain-syntax"> = </span><span class="identifier-syntax">which_statement</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">isn_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">STATEMENT_ISNT</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">first_child</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_4_1" class="named-paragraph-link"><span class="named-paragraph">Make the first child</span><span class="named-paragraph-number">13.4.1</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> != </span><span class="constant-syntax">STORE_BIP</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_4_2" class="named-paragraph-link"><span class="named-paragraph">Dangle the number or text</span><span class="named-paragraph-number">13.4.2</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_4_3" class="named-paragraph-link"><span class="named-paragraph">Make the second child</span><span class="named-paragraph-number">13.4.3</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> == </span><span class="constant-syntax">STORE_BIP</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP13_4_4" class="named-paragraph-link"><span class="named-paragraph">The special case of giving an attribute</span><span class="named-paragraph-number">13.4.4</span></a></span><span class="plain-syntax">;</span>
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</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13">§13</a>.</li></ul>
|
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<p class="commentary firstcommentary"><a id="SP13_4_1" class="paragraph-anchor"></a><b>§13.4.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Make the first child</span><span class="named-paragraph-number">13.4.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">first_child</span><span class="plain-syntax"> = </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">operand1</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">operand1</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::second_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">first_child</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">operand1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">first_child</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">first_child</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">first_child</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">first_child</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">cons</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13_4">§13.4</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP13_4_2" class="paragraph-anchor"></a><b>§13.4.2. </b>Ordinarily, <span class="extract"><span class="extract-syntax">operand1</span></span> provides the content for the first child expression,
|
|
but in the case of a dangling number or text, we use that instead. (Note that
|
|
they cannot both apply.)
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Dangle the number or text</span><span class="named-paragraph-number">13.4.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">dangle_number</span><span class="plain-syntax"> >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::new</span><span class="plain-syntax">();</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="string-syntax">"%d"</span><span class="plain-syntax">, </span><span class="identifier-syntax">dangle_number</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">first_child</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><a href="2-is.html#SP10" class="function-link"><span class="function-syntax">InterSchemas::new_token</span></a><span class="plain-syntax">(</span><span class="constant-syntax">NUMBER_ISTT</span><span class="plain-syntax">, </span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, -1);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">first_child</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">owner</span><span class="plain-syntax"> = </span><span class="identifier-syntax">first_child</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">dangle_text</span><span class="plain-syntax">) > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">first_child</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><a href="2-is.html#SP10" class="function-link"><span class="function-syntax">InterSchemas::new_token</span></a><span class="plain-syntax">(</span><span class="constant-syntax">DQUOTED_ISTT</span><span class="plain-syntax">, </span><span class="identifier-syntax">dangle_text</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, -1);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">first_child</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">owner</span><span class="plain-syntax"> = </span><span class="identifier-syntax">first_child</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="2-tkn.html#SP2" class="function-link"><span class="function-syntax">Tokenisation::de_escape_text</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">first_child</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13_4">§13.4</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP13_4_3" class="paragraph-anchor"></a><b>§13.4.3. </b>There is often no second child. But when there is:
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Make the second child</span><span class="named-paragraph-number">13.4.3</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">operand2</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">second_child</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">which_statement</span><span class="plain-syntax"> == </span><span class="constant-syntax">IFELSE_BIP</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">second_child</span><span class="plain-syntax">-></span><span class="element-syntax">semicolon_terminated</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">second_child</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">first_child</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">first_child</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">second_child</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">second_child</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">first_child</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">first_child</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">second_child</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">second_child</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">cons</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">second_child</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">operand2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">second_child</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">operand2_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand2_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">first_child</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">operand2_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">operand2_node</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">cons</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">( </span><span class="identifier-syntax">operand2_node</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13_4">§13.4</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP13_4_4" class="paragraph-anchor"></a><b>§13.4.4. </b>It was noted above that the <span class="extract"><span class="extract-syntax">STORE_BIP</span></span> value was being somewhat abused in
|
|
the one special case of <span class="extract"><span class="extract-syntax">give O P</span></span> or <span class="extract"><span class="extract-syntax">give O ~P</span></span>. This won't be a statement
|
|
at all — instead we rewrite this as the setting of a property value either
|
|
to 1 or 0 respectively. And that makes it an <span class="extract"><span class="extract-syntax">EXPRESSION_ISNT</span></span> node after all.
|
|
</p>
|
|
|
|
<p class="commentary">It would not have been legal in I6 to use <span class="extract"><span class="extract-syntax">O.P = 1</span></span> as an alternative to <span class="extract"><span class="extract-syntax">give O P</span></span>.
|
|
But it is legal to do so in this schema, and that is what our expression node does.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">The special case of giving an attribute</span><span class="named-paragraph-number">13.4.4</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">isn_clarifier</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">isn_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">A</span><span class="plain-syntax"> = </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">child_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">B</span><span class="plain-syntax"> = </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">child_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">A</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP10" class="function-link"><span class="function-syntax">InterSchemas::new_token</span></a><span class="plain-syntax">(</span><span class="constant-syntax">OPERATOR_ISTT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"."</span><span class="plain-syntax">, </span><span class="constant-syntax">PROPERTYVALUE_BIP</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, -1);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">B</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP10" class="function-link"><span class="function-syntax">InterSchemas::new_token</span></a><span class="plain-syntax">(</span><span class="constant-syntax">OPERATOR_ISTT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"="</span><span class="plain-syntax">, </span><span class="constant-syntax">STORE_BIP</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, -1);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::new</span><span class="plain-syntax">();</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="string-syntax">"%d"</span><span class="plain-syntax">, </span><span class="identifier-syntax">dangle_number</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cons</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP10" class="function-link"><span class="function-syntax">InterSchemas::new_token</span></a><span class="plain-syntax">(</span><span class="constant-syntax">NUMBER_ISTT</span><span class="plain-syntax">, </span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, -1);</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cons</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP13_4">§13.4</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP14" class="paragraph-anchor"></a><b>§14. The break for statements ramification. </b>This is where we dismantle <span class="extract"><span class="extract-syntax">for (X: Y: Z) ...</span></span> into its constituent parts,
|
|
removing the colon and bracket tokens. Thus:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> STATEMENT_ISNT = FOR_BIP</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> (</span>
|
|
<span class="plain-syntax"> X</span>
|
|
<span class="plain-syntax"> :</span>
|
|
<span class="plain-syntax"> Y</span>
|
|
<span class="plain-syntax"> :</span>
|
|
<span class="plain-syntax"> Z</span>
|
|
<span class="plain-syntax"> )</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> ...</span>
|
|
</pre>
|
|
<p class="commentary">should become
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> STATEMENT_ISNT = FOR_BIP</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> X</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> Y</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> Z</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> ...</span>
|
|
</pre>
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::break_for_statements</span><button class="popup" onclick="togglePopup('usagePopup13')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup13">Usage of <span class="code-font"><span class="function-syntax">Ramification::break_for_statements</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">STATEMENT_ISNT</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> == </span><span class="constant-syntax">FOR_BIP</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">node_marked</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">predicates</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">predicates</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">predicates</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> != </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"malformed 'for' loop"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">predicates</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">code_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">predicates</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">cw</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">from</span><span class="plain-syntax">[3], *</span><span class="identifier-syntax">to</span><span class="plain-syntax">[3];</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><3; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) { </span><span class="identifier-syntax">from</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">to</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="constant-syntax">0</span><span class="plain-syntax">; }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">from</span><span class="plain-syntax">[</span><span class="identifier-syntax">cw</span><span class="plain-syntax">] == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">)) </span><span class="identifier-syntax">from</span><span class="plain-syntax">[</span><span class="identifier-syntax">cw</span><span class="plain-syntax">] = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP14_1" class="named-paragraph-link"><span class="named-paragraph">End a for loop header clause</span><span class="named-paragraph-number">14.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">COLON_ISTT</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP14_1" class="named-paragraph-link"><span class="named-paragraph">End a for loop header clause</span><span class="named-paragraph-number">14.1</span></a></span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">from</span><span class="plain-syntax">[</span><span class="identifier-syntax">cw</span><span class="plain-syntax">] == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">from</span><span class="plain-syntax">[</span><span class="identifier-syntax">cw</span><span class="plain-syntax">] = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">cw</span><span class="plain-syntax"> != </span><span class="constant-syntax">3</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"'for' header with too few clauses"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><3; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">eval_isn</span><span class="plain-syntax"> = </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EVAL_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="identifier-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">eval_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="identifier-syntax">child_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">eval_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax"> == </span><span class="constant-syntax">2</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">eval_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">eval_isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">code_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">eval_isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">expr_isn</span><span class="plain-syntax"> = </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">eval_isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">expr_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">expr_isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">eval_isn</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">m</span><span class="plain-syntax"> = </span><span class="identifier-syntax">from</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">m</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">m</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">)) </span><span class="identifier-syntax">m</span><span class="plain-syntax"> = </span><span class="identifier-syntax">m</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">expr_isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">m</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">m</span><span class="plain-syntax"> == </span><span class="identifier-syntax">to</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">]) </span><span class="identifier-syntax">expr_isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">m</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">m</span><span class="plain-syntax">-></span><span class="element-syntax">owner</span><span class="plain-syntax"> = </span><span class="identifier-syntax">expr_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">m</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> == </span><span class="identifier-syntax">to</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">]) </span><span class="identifier-syntax">m</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">m</span><span class="plain-syntax"> = </span><span class="identifier-syntax">m</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">node_marked</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP14" class="function-link"><span class="function-syntax">Ramification::break_for_statements</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP14_1" class="paragraph-anchor"></a><b>§14.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">End a for loop header clause</span><span class="named-paragraph-number">14.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">cw</span><span class="plain-syntax"> >= </span><span class="constant-syntax">3</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"'for' header with too many clauses"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">from</span><span class="plain-syntax">[</span><span class="identifier-syntax">cw</span><span class="plain-syntax">] == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax">[</span><span class="identifier-syntax">cw</span><span class="plain-syntax">] = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax">[</span><span class="identifier-syntax">cw</span><span class="plain-syntax">] = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">from</span><span class="plain-syntax">[</span><span class="identifier-syntax">cw</span><span class="plain-syntax">] == </span><span class="identifier-syntax">to</span><span class="plain-syntax">[</span><span class="identifier-syntax">cw</span><span class="plain-syntax">]) { </span><span class="identifier-syntax">from</span><span class="plain-syntax">[</span><span class="identifier-syntax">cw</span><span class="plain-syntax">] = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">to</span><span class="plain-syntax">[</span><span class="identifier-syntax">cw</span><span class="plain-syntax">] = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">cw</span><span class="plain-syntax">++;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP14">§14</a> (twice).</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP15" class="paragraph-anchor"></a><b>§15. The add missing bodies ramification. </b>You do this at your own peril, but it is legal in Inform 6 to write, say,
|
|
<span class="extract"><span class="extract-syntax">if (...) { ; }</span></span> or <span class="extract"><span class="extract-syntax">while (...) ;</span></span>. In our schema, those statement nodes will
|
|
have one fewer child node, because there will be nothing where the final child
|
|
node ought to be. We add an empty code node if so, and this saves the schema
|
|
from failing its lint test.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::add_missing_bodies</span><button class="popup" onclick="togglePopup('usagePopup14')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup14">Usage of <span class="code-font"><span class="function-syntax">Ramification::add_missing_bodies</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">req</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">STATEMENT_ISNT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> == </span><span class="constant-syntax">IF_BIP</span><span class="plain-syntax">)) </span><span class="identifier-syntax">req</span><span class="plain-syntax"> = </span><span class="constant-syntax">2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">STATEMENT_ISNT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> == </span><span class="constant-syntax">IFELSE_BIP</span><span class="plain-syntax">)) </span><span class="identifier-syntax">req</span><span class="plain-syntax"> = </span><span class="constant-syntax">3</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">STATEMENT_ISNT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> == </span><span class="constant-syntax">FOR_BIP</span><span class="plain-syntax">)) </span><span class="identifier-syntax">req</span><span class="plain-syntax"> = </span><span class="constant-syntax">4</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">STATEMENT_ISNT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> == </span><span class="constant-syntax">WHILE_BIP</span><span class="plain-syntax">)) </span><span class="identifier-syntax">req</span><span class="plain-syntax"> = </span><span class="constant-syntax">2</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">STATEMENT_ISNT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> == </span><span class="constant-syntax">OBJECTLOOP_BIP</span><span class="plain-syntax">)) </span><span class="identifier-syntax">req</span><span class="plain-syntax"> = </span><span class="constant-syntax">2</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">req</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">node_marked</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">)) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">actual</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">; </span><span class="identifier-syntax">ch</span><span class="plain-syntax">; </span><span class="identifier-syntax">ch</span><span class="plain-syntax">=</span><span class="identifier-syntax">ch</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) </span><span class="identifier-syntax">actual</span><span class="plain-syntax">++;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">actual</span><span class="plain-syntax"> < </span><span class="identifier-syntax">req</span><span class="plain-syntax">-1) || (</span><span class="identifier-syntax">actual</span><span class="plain-syntax"> > </span><span class="identifier-syntax">req</span><span class="plain-syntax">)) {</span>
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|
<span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"malformed statement"</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> }</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">actual</span><span class="plain-syntax"> == </span><span class="identifier-syntax">req</span><span class="plain-syntax">-1) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">code_isn</span><span class="plain-syntax"> = </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">CODE_ISNT</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">code_isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">;</span>
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|
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<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">)) </span><span class="identifier-syntax">ch</span><span class="plain-syntax">=</span><span class="identifier-syntax">ch</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">code_isn</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><a href="2-is.html#SP5" class="function-link"><span class="function-syntax">InterSchemas::mark_unclosed</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">code_isn</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">node_marked</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP15" class="function-link"><span class="function-syntax">Ramification::add_missing_bodies</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
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|
<p class="commentary firstcommentary"><a id="SP16" class="paragraph-anchor"></a><b>§16. The remove empty expressions ramification. </b>If an <span class="extract"><span class="extract-syntax">EXPRESSION_ISNT</span></span> contains no tokens, remove it from the tree. (The
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parsing process has a tendency to leave these around, especially at the end of
|
|
code blocks. They mean nothing, but it's tidy to remove them.)
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::remove_empties</span><button class="popup" onclick="togglePopup('usagePopup15')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup15">Usage of <span class="code-font"><span class="function-syntax">Ramification::remove_empties</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">prev</span><span class="plain-syntax">) </span><span class="identifier-syntax">prev</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">par</span><span class="plain-syntax">) </span><span class="identifier-syntax">par</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">-></span><span class="element-syntax">node_tree</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP16" class="function-link"><span class="function-syntax">Ramification::remove_empties</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP17" class="paragraph-anchor"></a><b>§17. The outer subexpressions ramification. </b>If an expression looks like <span class="extract"><span class="extract-syntax">( ... )</span></span>, but not <span class="extract"><span class="extract-syntax">( ... ) ... ( ... )</span></span> — in
|
|
other words, if the entire expression lies inside a matching pair of round
|
|
brackets...
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::outer_subexpressions</span><button class="popup" onclick="togglePopup('usagePopup16')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup16">Usage of <span class="code-font"><span class="function-syntax">Ramification::outer_subexpressions</span></span>:<br/><a href="2-rmf.html#SP1">§1</a>, <a href="2-rmf.html#SP21">§21</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> ( ; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::first_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="identifier-syntax">fails</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::next_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">from</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">, *</span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">fails</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::next_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">fails</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">from</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">to</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">from</span><span class="plain-syntax"> != </span><span class="identifier-syntax">to</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP17_1" class="named-paragraph-link"><span class="named-paragraph">This expression is entirely in a matching pair of round brackets</span><span class="named-paragraph-number">17.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP17" class="function-link"><span class="function-syntax">Ramification::outer_subexpressions</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP17_1" class="paragraph-anchor"></a><b>§17.1. </b>...then we move the bracketed content under a new subexpression node, so
|
|
that <span class="extract"><span class="extract-syntax">(x+1)</span></span> would now become:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> SUBEXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> x</span>
|
|
<span class="plain-syntax"> +</span>
|
|
<span class="plain-syntax"> 1</span>
|
|
</pre>
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">This expression is entirely in a matching pair of round brackets</span><span class="named-paragraph-number">17.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sub_node</span><span class="plain-syntax"> = </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub_node</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">from</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">l</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub_node</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">; </span><span class="identifier-syntax">l</span><span class="plain-syntax">; </span><span class="identifier-syntax">l</span><span class="plain-syntax">=</span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> == </span><span class="identifier-syntax">to</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">sub_node</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">SUBEXPRESSION_ISNT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">sub_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">sub_node</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP17">§17</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP18" class="paragraph-anchor"></a><b>§18. The top level commas ramification. </b>Commas are now used in just two different ways: to divide up function arguments,
|
|
and as the serial evaluation operator. Because we have already performed the outer
|
|
subexpressions ramification, we can tell which meaning applies by seeing if a comma
|
|
occurs at the top level or inside of brackets. Thus <span class="extract"><span class="extract-syntax">a, b, c</span></span> must be serial
|
|
evaluation — evaluate <span class="extract"><span class="extract-syntax">a</span></span>, then <span class="extract"><span class="extract-syntax">b</span></span>, then <span class="extract"><span class="extract-syntax">c</span></span> — whereas <span class="extract"><span class="extract-syntax">a + f(b, c)</span></span> cannot be.
|
|
</p>
|
|
|
|
<p class="commentary">This changes
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> a</span>
|
|
<span class="plain-syntax"> ,</span>
|
|
<span class="plain-syntax"> (</span>
|
|
<span class="plain-syntax"> b</span>
|
|
<span class="plain-syntax"> ,</span>
|
|
<span class="plain-syntax"> c</span>
|
|
<span class="plain-syntax"> )</span>
|
|
</pre>
|
|
<p class="commentary">to:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> a</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> (</span>
|
|
<span class="plain-syntax"> b</span>
|
|
<span class="plain-syntax"> ,</span>
|
|
<span class="plain-syntax"> c</span>
|
|
<span class="plain-syntax"> )</span>
|
|
</pre>
|
|
<p class="commentary">After this stage, then, the only commas left are those used for function arguments.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::top_level_commas</span><button class="popup" onclick="togglePopup('usagePopup17')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup17">Usage of <span class="code-font"><span class="function-syntax">Ramification::top_level_commas</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> ( ; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">, *</span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">COMMA_ISTT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">prev</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prev</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">; </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">)) { </span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">; </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">; }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">saved</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">semicolon_terminated</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">semicolon_terminated</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">; </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="identifier-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP18" class="function-link"><span class="function-syntax">Ramification::top_level_commas</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP19" class="paragraph-anchor"></a><b>§19. The multiple case values ramification. </b>In Inform 6, a case in a <span class="extract"><span class="extract-syntax">switch</span></span> can contain multiple values, divided by commas.
|
|
So the expression node underneath a case might for example have the tokens <span class="extract"><span class="extract-syntax">1 , 2 , 6</span></span>,
|
|
and the top level commas ramification will have made those into serial evaluations.
|
|
We correct those to uses of the special <span class="extract"><span class="extract-syntax">ALTERNATIVECASE_BIP</span></span> operator instead.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::multiple_case_values</span><button class="popup" onclick="togglePopup('usagePopup18')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup18">Usage of <span class="code-font"><span class="function-syntax">Ramification::multiple_case_values</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> == </span><span class="constant-syntax">CASE_BIP</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">A</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">B</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">A</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">B</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">B</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">C</span><span class="plain-syntax"> = </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">OPERATION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">C</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> = </span><span class="constant-syntax">ALTERNATIVECASE_BIP</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">C</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">A</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">A</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">C</span><span class="plain-syntax">; </span><span class="identifier-syntax">B</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">C</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">C</span><span class="plain-syntax">; </span><span class="identifier-syntax">C</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">B</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">; </span><span class="identifier-syntax">B</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">C</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP19" class="function-link"><span class="function-syntax">Ramification::multiple_case_values</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP20" class="paragraph-anchor"></a><b>§20. The strip all white space ramification. </b>White space has an important role to play earlier on in the process, but once
|
|
our tree structure contains the information it carries, we can discard it.
|
|
This simply deletes every token of type <span class="extract"><span class="extract-syntax">WHITE_SPACE_ISTT</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::strip_all_white_space</span><button class="popup" onclick="togglePopup('usagePopup19')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup19">Usage of <span class="code-font"><span class="function-syntax">Ramification::strip_all_white_space</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">d</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">prev</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">prev</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">WHITE_SPACE_ISTT</span><span class="plain-syntax">) { </span><span class="identifier-syntax">prev</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">; </span><span class="identifier-syntax">d</span><span class="plain-syntax">++; }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">; </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="identifier-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">d</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP20" class="function-link"><span class="function-syntax">Ramification::strip_all_white_space</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP21" class="paragraph-anchor"></a><b>§21. The debracket ramification. </b>It's finally time to remove all round bracket tokens from the schema, and this
|
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means understanding which ones clarify the order of operations, as in <span class="extract"><span class="extract-syntax">a * ( b + c)</span></span>,
|
|
and which signal function calls, as in <span class="extract"><span class="extract-syntax">f ( a , b )</span></span>. At each node:
|
|
</p>
|
|
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<ul class="items"><li>● we use <a href="2-rmf.html#SP17" class="internal">Ramification::outer_subexpressions</a> to dispose of the <span class="extract"><span class="extract-syntax">( ... )</span></span> case;
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|
</li><li>● then <a href="2-rmf.html#SP22" class="internal">Ramification::op_subexpressions</a> to look for the <span class="extract"><span class="extract-syntax">a * ( b + c)</span></span> case;
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</li><li>● and finally <a href="2-rmf.html#SP23" class="internal">Ramification::place_calls</a> to take care of <span class="extract"><span class="extract-syntax">f ( a , b )</span></span>.
|
|
</li></ul>
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::debracket</span><button class="popup" onclick="togglePopup('usagePopup20')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup20">Usage of <span class="code-font"><span class="function-syntax">Ramification::debracket</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP17" class="function-link"><span class="function-syntax">Ramification::outer_subexpressions</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP22" class="function-link"><span class="function-syntax">Ramification::op_subexpressions</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP23" class="function-link"><span class="function-syntax">Ramification::place_calls</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP22" class="paragraph-anchor"></a><b>§22. </b>So, then, operations. We detect these because they have an operator at the
|
|
top level. Thus, <span class="extract"><span class="extract-syntax">f(x*y) + 2</span></span> must be an operation because of the top-level <span class="extract"><span class="extract-syntax">+</span></span>.
|
|
We split this into a left and right operand: <span class="extract"><span class="extract-syntax">f(x*y)</span></span> and <span class="extract"><span class="extract-syntax">2</span></span> in this example.
|
|
Those become the children of an <span class="extract"><span class="extract-syntax">OPERATION_ISNT</span></span> node, which replaces the
|
|
original <span class="extract"><span class="extract-syntax">EXPRESSION_ISNT</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::op_subexpressions</span><button class="popup" onclick="togglePopup('usagePopup21')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup21">Usage of <span class="code-font"><span class="function-syntax">Ramification::op_subexpressions</span></span>:<br/><a href="2-rmf.html#SP21">§21</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> ( ; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">node_marked</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">node_marked</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">final_operation</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">final_op_token</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP22_1" class="named-paragraph-link"><span class="named-paragraph">Find the lowest-precedence top level operator, if any</span><span class="named-paragraph-number">22.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">final_op_token</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">from</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::first_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">), *</span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">final_op_token</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">has_left_operand</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">has_right_operand</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">from</span><span class="plain-syntax"> != </span><span class="identifier-syntax">to</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP22_3" class="named-paragraph-link"><span class="named-paragraph">Make the left operand expression</span><span class="named-paragraph-number">22.3</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">from</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::next_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">final_op_token</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">from</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP22_4" class="named-paragraph-link"><span class="named-paragraph">Make the right operand expression</span><span class="named-paragraph-number">22.4</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP22_5" class="named-paragraph-link"><span class="named-paragraph">Work out which operation is implied by the operator</span><span class="named-paragraph-number">22.5</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP22" class="function-link"><span class="function-syntax">Ramification::op_subexpressions</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP22_1" class="paragraph-anchor"></a><b>§22.1. </b>For example, the final operator in <span class="extract"><span class="extract-syntax">1 + 3 * ( x . y )</span></span> is the <span class="extract"><span class="extract-syntax">+</span></span>, in that
|
|
this is the operation which will be performed last. It's the one with the
|
|
lowest precedence out of the two top-level operators here, the <span class="extract"><span class="extract-syntax">+</span></span> and <span class="extract"><span class="extract-syntax">*</span></span>.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="extract"><span class="extract-syntax">in</span></span> is not a reserved word in Inform 6, though it probably should be. It can
|
|
be used as an operator, as in the condition <span class="extract"><span class="extract-syntax">if (x in y) ...</span></span>, but it can also
|
|
be a variable name. So we will detect it only when it is used infix, and will
|
|
otherwise convert it from an <span class="extract"><span class="extract-syntax">OPERATOR_ISTT</span></span> to an <span class="extract"><span class="extract-syntax">IDENTIFIER_ISTT</span></span>.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Find the lowest-precedence top level operator, if any</span><span class="named-paragraph-number">22.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">f</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::first_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">f</span><span class="plain-syntax">; </span><span class="identifier-syntax">n</span><span class="plain-syntax">; </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::next_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPERATOR_ISTT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">this_operator</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">operation_primitive</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">this_operator</span><span class="plain-syntax"> == </span><span class="constant-syntax">IN_BIP</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax"> == </span><span class="identifier-syntax">f</span><span class="plain-syntax">) || (</span><a href="2-is.html#SP16" class="function-link"><span class="function-syntax">InterSchemas::next_dark_token</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">) == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">))) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">IDENTIFIER_ISTT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">operation_primitive</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP22_2" class="function-link"><span class="function-syntax">Ramification::prefer_over</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">this_operator</span><span class="plain-syntax">, </span><span class="identifier-syntax">final_operation</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">final_op_token</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">; </span><span class="identifier-syntax">final_operation</span><span class="plain-syntax"> = </span><span class="identifier-syntax">this_operator</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP22">§22</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP22_2" class="paragraph-anchor"></a><b>§22.2. </b>Well... so actually we have to be a bit more careful about left vs right
|
|
associativity if there are two least-precendence operators both at the top
|
|
level, as in the case of <span class="extract"><span class="extract-syntax">x - y + z</span></span> or (horrifically) <span class="extract"><span class="extract-syntax">x = y = z</span></span>.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::prefer_over</span><button class="popup" onclick="togglePopup('usagePopup22')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup22">Usage of <span class="code-font"><span class="function-syntax">Ramification::prefer_over</span></span>:<br/><a href="2-rmf.html#SP22_1">§22.1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">p</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">existing</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">existing</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-i6o.html#SP9" class="function-link"><span class="function-syntax">I6Operators::precedence</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">p</span><span class="plain-syntax">) < </span><a href="2-i6o.html#SP9" class="function-link"><span class="function-syntax">I6Operators::precedence</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">existing</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><a href="2-i6o.html#SP9" class="function-link"><span class="function-syntax">I6Operators::precedence</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">p</span><span class="plain-syntax">) == </span><a href="2-i6o.html#SP9" class="function-link"><span class="function-syntax">I6Operators::precedence</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">existing</span><span class="plain-syntax">)) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="2-i6o.html#SP10" class="function-link"><span class="function-syntax">I6Operators::right_associative</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">p</span><span class="plain-syntax">)) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="2-i6o.html#SP7" class="function-link"><span class="function-syntax">I6Operators::arity</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">p</span><span class="plain-syntax">) == </span><span class="constant-syntax">2</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><a href="2-i6o.html#SP7" class="function-link"><span class="function-syntax">I6Operators::arity</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">existing</span><span class="plain-syntax">) == </span><span class="constant-syntax">2</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP22_3" class="paragraph-anchor"></a><b>§22.3. </b>So the basic plan is to turn out example <span class="extract"><span class="extract-syntax">x + y * z</span></span> into
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> OPERATION_ISNT = PLUS_BIP</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> x</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> y * z</span>
|
|
</pre>
|
|
<p class="commentary">Recursion of the above then turns this into
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> OPERATION_ISNT</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT = PLUS_BIP</span>
|
|
<span class="plain-syntax"> x</span>
|
|
<span class="plain-syntax"> OPERATION_ISNT = TIMES_BIP</span>
|
|
<span class="plain-syntax"> EXPRESSION_ISNT</span>
|
|
<span class="plain-syntax"> y</span>
|
|
<span class="plain-syntax"> z</span>
|
|
</pre>
|
|
<p class="commentary">Here the final operator is the <span class="extract"><span class="extract-syntax">+</span></span>, and there are both left and right operands.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Make the left operand expression</span><span class="named-paragraph-number">22.3</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">left_operand_node</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">left_operand_node</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">from</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">l</span><span class="plain-syntax"> = </span><span class="identifier-syntax">left_operand_node</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">; </span><span class="identifier-syntax">l</span><span class="plain-syntax">; </span><span class="identifier-syntax">l</span><span class="plain-syntax">=</span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> == </span><span class="identifier-syntax">to</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">left_operand_node</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">left_operand_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">left_operand_node</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">has_left_operand</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP22">§22</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP22_4" class="paragraph-anchor"></a><b>§22.4. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Make the right operand expression</span><span class="named-paragraph-number">22.4</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">right_operand_node</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">right_operand_node</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">from</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">right_operand_node</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">right_operand_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">right_operand_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">right_operand_node</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">has_right_operand</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP22">§22</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP22_5" class="paragraph-anchor"></a><b>§22.5. </b>It's only now that we can clarify the meaning of <span class="extract"><span class="extract-syntax">++</span></span>, for example, which
|
|
is one operation used as a prefix, and another used as a suffix.
|
|
</p>
|
|
|
|
<p class="commentary">Note that Inform 6 does allow labels to be used as a value, but only in <span class="extract"><span class="extract-syntax">jump</span></span>
|
|
statements or assembly language. Since labels begin with a <span class="extract"><span class="extract-syntax">.</span></span>, as in <span class="extract"><span class="extract-syntax">.Example</span></span>,
|
|
we need to be careful not to misread that as a use of the property-value
|
|
operation <span class="extract"><span class="extract-syntax">a.b</span></span>.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Work out which operation is implied by the operator</span><span class="named-paragraph-number">22.5</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">OPERATION_ISNT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> = </span><span class="identifier-syntax">final_operation</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">final_operation</span><span class="plain-syntax"> == </span><span class="constant-syntax">MINUS_BIP</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">has_left_operand</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> = </span><span class="constant-syntax">UNARYMINUS_BIP</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">final_operation</span><span class="plain-syntax"> == </span><span class="constant-syntax">POSTINCREMENT_BIP</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">has_left_operand</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> = </span><span class="constant-syntax">PREINCREMENT_BIP</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">final_operation</span><span class="plain-syntax"> == </span><span class="constant-syntax">POSTDECREMENT_BIP</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">has_left_operand</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> = </span><span class="constant-syntax">PREDECREMENT_BIP</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">final_operation</span><span class="plain-syntax"> == </span><span class="constant-syntax">PROPERTYVALUE_BIP</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">has_left_operand</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">LABEL_ISNT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">has_left_operand</span><span class="plain-syntax">) </span><span class="identifier-syntax">a</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">has_right_operand</span><span class="plain-syntax">) </span><span class="identifier-syntax">a</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">a</span><span class="plain-syntax"> != </span><a href="2-i6o.html#SP7" class="function-link"><span class="function-syntax">I6Operators::arity</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">msg</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">msg</span><span class="plain-syntax">, </span><span class="string-syntax">"operator '%S' used with %d not %d operand(s)"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="2-i6o.html#SP5" class="function-link"><span class="function-syntax">I6Operators::I6_notation_for</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">a</span><span class="plain-syntax">, </span><a href="2-i6o.html#SP7" class="function-link"><span class="function-syntax">I6Operators::arity</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">msg</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">msg</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP22">§22</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP23" class="paragraph-anchor"></a><b>§23. </b>Now for function calls.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::place_calls</span><button class="popup" onclick="togglePopup('usagePopup23')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup23">Usage of <span class="code-font"><span class="function-syntax">Ramification::place_calls</span></span>:<br/><a href="2-rmf.html#SP21">§21</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> ( ; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP23_1" class="named-paragraph-link"><span class="named-paragraph">Maybe the function is itself a bracketed term</span><span class="named-paragraph-number">23.1</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP23_2" class="named-paragraph-link"><span class="named-paragraph">Or maybe the function is not bracketed</span><span class="named-paragraph-number">23.2</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP23" class="function-link"><span class="function-syntax">Ramification::place_calls</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP23_1" class="paragraph-anchor"></a><b>§23.1. </b>This is to catch the super-annoying possibility <span class="extract"><span class="extract-syntax">(array->2)(7)</span></span>, where an
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array lookup is performed to find the address of the function to call.
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</p>
|
|
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|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Maybe the function is itself a bracketed term</span><span class="named-paragraph-number">23.1</span></span><span class="comment-syntax"> =</span>
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</p>
|
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">term_count</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">tops</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">opener</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, *</span><span class="identifier-syntax">closer</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">; </span><span class="identifier-syntax">n</span><span class="plain-syntax">; </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax">++;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) { </span><span class="identifier-syntax">opener</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">; </span><span class="identifier-syntax">closer</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">term_count</span><span class="plain-syntax">++; }</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) { </span><span class="identifier-syntax">closer</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">; }</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">tops</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> }</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">term_count</span><span class="plain-syntax"> == </span><span class="constant-syntax">2</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">tops</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">opener</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">closer</span><span class="plain-syntax">)) {</span>
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|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP23_1_1" class="named-paragraph-link"><span class="named-paragraph">Call brackets found</span><span class="named-paragraph-number">23.1.1</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP23">§23</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP23_2" class="paragraph-anchor"></a><b>§23.2. </b>But much more usually...
|
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</p>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Or maybe the function is not bracketed</span><span class="named-paragraph-number">23.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
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<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="identifier-syntax">expression_tokens</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">opener</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, *</span><span class="identifier-syntax">closer</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">pre_count</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">pre_bracings</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">post_count</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">veto</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">bl</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">opener</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">opener</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">veto</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">closer</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">)) </span><span class="identifier-syntax">closer</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> != </span><span class="constant-syntax">INLINE_ISTT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">opener</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">pre_count</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">opener</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">closer</span><span class="plain-syntax">)) </span><span class="identifier-syntax">post_count</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">opener</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">pre_bracings</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (((</span><span class="identifier-syntax">pre_count</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) || ((</span><span class="identifier-syntax">pre_count</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">pre_bracings</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">))) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">post_count</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">opener</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">closer</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">veto</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP23_1_1" class="named-paragraph-link"><span class="named-paragraph">Call brackets found</span><span class="named-paragraph-number">23.1.1</span></a></span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP23">§23</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP23_1_1" class="paragraph-anchor"></a><b>§23.1.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Call brackets found</span><span class="named-paragraph-number">23.1.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">from</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">, *</span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">opener</span><span class="plain-syntax">, *</span><span class="identifier-syntax">resume</span><span class="plain-syntax"> = </span><span class="identifier-syntax">opener</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP23_1_1_1" class="named-paragraph-link"><span class="named-paragraph">Relegate node</span><span class="named-paragraph-number">23.1.1.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">resume</span><span class="plain-syntax">; </span><span class="identifier-syntax">from</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">; </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">bl</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax"> != </span><span class="identifier-syntax">closer</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPEN_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CLOSE_ROUND_ISTT</span><span class="plain-syntax">) </span><span class="identifier-syntax">bl</span><span class="plain-syntax">--;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">bl</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">COMMA_ISTT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">; </span><span class="identifier-syntax">resume</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP23_1_1_1" class="named-paragraph-link"><span class="named-paragraph">Relegate node</span><span class="named-paragraph-number">23.1.1.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">from</span><span class="plain-syntax"> = </span><span class="identifier-syntax">resume</span><span class="plain-syntax">; </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">from</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">closer</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rmf.html#SP23_1_1_1" class="named-paragraph-link"><span class="named-paragraph">Relegate node</span><span class="named-paragraph-number">23.1.1.1</span></a></span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">CALL_ISNT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP23_1">§23.1</a>, <a href="2-rmf.html#SP23_2">§23.2</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP23_1_1_1" class="paragraph-anchor"></a><b>§23.1.1.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Relegate node</span><span class="named-paragraph-number">23.1.1.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">from</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">to</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">from</span><span class="plain-syntax"> != </span><span class="identifier-syntax">to</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><span class="identifier-syntax">from</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">l</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">; </span><span class="identifier-syntax">l</span><span class="plain-syntax">; </span><span class="identifier-syntax">l</span><span class="plain-syntax">=</span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> == </span><span class="identifier-syntax">to</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">l</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><a href="2-is.html#SP15" class="function-link"><span class="function-syntax">InterSchemas::changed_tokens_on</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">xisn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">xisn</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">xisn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">)) </span><span class="identifier-syntax">xisn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">xisn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">xisn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">new_isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="2-rmf.html#SP23_1_1">§23.1.1</a> (three times).</li></ul>
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<p class="commentary firstcommentary"><a id="SP24" class="paragraph-anchor"></a><b>§24. The implied return values ramification. </b>A bare <span class="extract"><span class="extract-syntax">return;</span></span> statement in Inform 6 means "return true", i.e., the numerical value 1.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::implied_return_values</span><button class="popup" onclick="togglePopup('usagePopup24')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup24">Usage of <span class="code-font"><span class="function-syntax">Ramification::implied_return_values</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">STATEMENT_ISNT</span><span class="plain-syntax">) &&</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> == </span><span class="constant-syntax">RETURN_BIP</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">one</span><span class="plain-syntax"> = </span><a href="2-is.html#SP4" class="function-link"><span class="function-syntax">InterSchemas::new_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">parent_schema</span><span class="plain-syntax">, </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">one</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax"> = </span><a href="2-is.html#SP10" class="function-link"><span class="function-syntax">InterSchemas::new_token</span></a><span class="plain-syntax">(</span><span class="constant-syntax">NUMBER_ISTT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"1"</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, -1);</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">one</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">-></span><span class="element-syntax">owner</span><span class="plain-syntax"> = </span><span class="identifier-syntax">one</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">one</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">one</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP24" class="function-link"><span class="function-syntax">Ramification::implied_return_values</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
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|
<p class="commentary firstcommentary"><a id="SP25" class="paragraph-anchor"></a><b>§25. The message calls ramification. </b>Here we look for the configuration <span class="extract"><span class="extract-syntax">x.y(z)</span></span>, which is a message call — i.e. a
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|
function call to <span class="extract"><span class="extract-syntax">x.y</span></span>, of a special kind — rather than a lookup of the property
|
|
<span class="extract"><span class="extract-syntax">y(z)</span></span> on the object <span class="extract"><span class="extract-syntax">x</span></span>. We clarify using <span class="extract"><span class="extract-syntax">MESSAGE_ISNT.
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|
</span></span></p>
|
|
|
|
<p class="commentary">There is also the oddball syntax <span class="extract"><span class="extract-syntax">f.call(y)</span></span>, which performs a function call too.
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|
This is almost useless, but we pick it up anyway.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::message_calls</span><button class="popup" onclick="togglePopup('usagePopup25')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup25">Usage of <span class="code-font"><span class="function-syntax">Ramification::message_calls</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">prev</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">OPERATION_ISNT</span><span class="plain-syntax">) &&</span>
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|
<span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> == </span><span class="constant-syntax">PROPERTYVALUE_BIP</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">CALL_ISNT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">obj</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">message</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">args</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">MESSAGE_ISNT</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_clarifier</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">obj</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">message</span><span class="plain-syntax">; </span><span class="identifier-syntax">message</span><span class="plain-syntax">-></span><span class="element-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">message</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">args</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">message</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">message</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">n</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"call"</span><span class="plain-syntax">))) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">obj</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">args</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> = </span><span class="constant-syntax">CALLMESSAGE_ISNT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">args</span><span class="plain-syntax">) { </span><span class="identifier-syntax">args</span><span class="plain-syntax">-></span><span class="identifier-syntax">parent_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">args</span><span class="plain-syntax"> = </span><span class="identifier-syntax">args</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">; }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-rmf.html#SP25" class="function-link"><span class="function-syntax">Ramification::message_calls</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP26" class="paragraph-anchor"></a><b>§26. The sanity check ramification. </b>This does nothing except to catch some errors more politely than allowing them
|
|
to cause trouble later. If no error is thrown, the schema is unchanged.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Ramification::sanity_check</span><button class="popup" onclick="togglePopup('usagePopup26')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup26">Usage of <span class="code-font"><span class="function-syntax">Ramification::sanity_check</span></span>:<br/><a href="2-rmf.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">par</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_schema_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">isn</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">; </span><span class="identifier-syntax">isn</span><span class="plain-syntax">=</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">next_node</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">isn_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">EXPRESSION_ISNT</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">asm</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">inter_schema_token</span><span class="plain-syntax"> *</span><span class="identifier-syntax">t</span><span class="plain-syntax"> = </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">; </span><span class="identifier-syntax">t</span><span class="plain-syntax">; </span><span class="identifier-syntax">t</span><span class="plain-syntax">=</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">OPCODE_ISTT:</span><span class="plain-syntax"> </span><span class="identifier-syntax">asm</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">RAW_ISTT:</span><span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"malformed expression"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">OPEN_BRACE_ISTT:</span><span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"unexpected '{'"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">CLOSE_BRACE_ISTT:</span><span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"unexpected '}'"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">OPEN_ROUND_ISTT:</span><span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"unexpected '('"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">CLOSE_ROUND_ISTT:</span><span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"unexpected ')'"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">COMMA_ISTT:</span><span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"unexpected ','"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">DIVIDER_ISTT:</span><span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"malformed expression"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">RESERVED_ISTT:</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">msg</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">msg</span><span class="plain-syntax">, </span><span class="string-syntax">"unexpected use of reserved word '%S'"</span><span class="plain-syntax">, </span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">material</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">msg</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">msg</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">COLON_ISTT:</span><span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"unexpected ':'"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">OPERATOR_ISTT:</span><span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"unexpected operator"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">NUMBER_ISTT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">) &&</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">t</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">-></span><span class="element-syntax">ist_type</span><span class="plain-syntax"> == </span><span class="constant-syntax">NUMBER_ISTT</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">asm</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">))</span>
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<span class="plain-syntax"> </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"two consecutive numbers"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">) </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"malformed expression"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">expression_tokens</span><span class="plain-syntax">) </span><a href="2-is.html#SP20" class="function-link"><span class="function-syntax">InterSchemas::throw_error</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"syntax error"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><a href="2-rmf.html#SP26" class="function-link"><span class="function-syntax">Ramification::sanity_check</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">isn</span><span class="plain-syntax">, </span><span class="identifier-syntax">isn</span><span class="plain-syntax">-></span><span class="element-syntax">child_node</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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