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<title>2/plm</title>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta http-equiv="Content-Language" content="en-gb">
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<link href="inweb.css" rel="stylesheet" rev="stylesheet" type="text/css">
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<!--Weave of '2/rcc' generated by 7-->
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<ul class="crumbs"><li><a href="../webs.html">★</a></li><li><a href="index.html">codegen</a></li><li><a href="index.html#2">Chapter 2: Miscellaneous Pipeline Stages</a></li><li><b>Resolving Conditional Compilation</b></li></ul><p class="purpose">To generate the initial state of storage for variables.</p>
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<ul class="toc"><li><a href="#SP1">§1. Pipeline stage</a></li><li><a href="#SP2">§2. Resolution</a></li></ul><hr class="tocbar">
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<p class="inwebparagraph"><a id="SP1"></a><b>§1. Pipeline stage. </b></p>
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<pre class="display">
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<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">CodeGen::RCC::create_pipeline_stage</span><span class="plain">(</span><span class="reserved">void</span><span class="plain">) {</span>
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<span class="functiontext">CodeGen::Stage::new</span><span class="plain">(</span><span class="identifier">I</span><span class="string">"resolve-conditional-compilation"</span><span class="plain">, </span><span class="functiontext">CodeGen::RCC::run_pipeline_stage</span><span class="plain">, </span><span class="constant">NO_STAGE_ARG</span><span class="plain">, </span><span class="identifier">FALSE</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">CodeGen::RCC::run_pipeline_stage</span><span class="plain">(</span><span class="reserved">pipeline_step</span><span class="plain"> *</span><span class="identifier">step</span><span class="plain">) {</span>
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<span class="functiontext">CodeGen::RCC::resolve</span><span class="plain">(</span><span class="identifier">step</span><span class="plain">-</span><span class="element">>repository</span><span class="plain">);</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function CodeGen::RCC::create_pipeline_stage is used in 1/stg (<a href="1-stg.html#SP2">§2</a>).</p>
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<p class="endnote">The function CodeGen::RCC::run_pipeline_stage appears nowhere else.</p>
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<p class="inwebparagraph"><a id="SP2"></a><b>§2. Resolution. </b></p>
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<pre class="definitions">
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<span class="definitionkeyword">define</span> <span class="constant">MAX_CC_STACK_SIZE</span><span class="plain"> 32</span>
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</pre>
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<pre class="display">
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<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">rcc_state</span><span class="plain"> {</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="identifier">dictionary</span><span class="plain"> *</span><span class="identifier">I6_level_symbols</span><span class="plain">;</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">cc_stack</span><span class="plain">[</span><span class="constant">MAX_CC_STACK_SIZE</span><span class="plain">];</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">cc_sp</span><span class="plain">;</span>
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<span class="plain">} </span><span class="reserved">rcc_state</span><span class="plain">;</span>
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<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">CodeGen::RCC::resolve</span><span class="plain">(</span><span class="identifier">inter_tree</span><span class="plain"> *</span><span class="identifier">I</span><span class="plain">) {</span>
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<span class="reserved">rcc_state</span><span class="plain"> </span><span class="identifier">state</span><span class="plain">;</span>
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<span class="identifier">state</span><span class="element">.I6_level_symbols</span><span class="plain"> = </span><span class="identifier">Dictionaries::new</span><span class="plain">(1024, </span><span class="identifier">TRUE</span><span class="plain">);</span>
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<span class="identifier">state</span><span class="element">.cc_sp</span><span class="plain"> = 0;</span>
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<span class="identifier">Inter::Tree::traverse</span><span class="plain">(</span><span class="identifier">I</span><span class="plain">, </span><span class="functiontext">CodeGen::RCC::visitor</span><span class="plain">, &</span><span class="identifier">state</span><span class="plain">, </span><span class="identifier">NULL</span><span class="plain">, 0);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">state</span><span class="element">.cc_sp</span><span class="plain"> != 0)</span>
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<span class="functiontext">TemplateReader::error</span><span class="plain">(</span><span class="string">"conditional compilation is wrongly structured in the template: not enough #endif"</span><span class="plain">, </span><span class="identifier">NULL</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">CodeGen::RCC::visitor</span><span class="plain">(</span><span class="identifier">inter_tree</span><span class="plain"> *</span><span class="identifier">I</span><span class="plain">, </span><span class="identifier">inter_tree_node</span><span class="plain"> *</span><span class="identifier">P</span><span class="plain">, </span><span class="reserved">void</span><span class="plain"> *</span><span class="identifier">v_state</span><span class="plain">) {</span>
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<span class="reserved">rcc_state</span><span class="plain"> *</span><span class="identifier">state</span><span class="plain"> = (</span><span class="reserved">rcc_state</span><span class="plain"> *) </span><span class="identifier">v_state</span><span class="plain">;</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">allow</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
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<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain"><</span><span class="identifier">state</span><span class="plain">-</span><span class="element">>cc_sp</span><span class="plain">; </span><span class="identifier">i</span><span class="plain">++) </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">state</span><span class="plain">-</span><span class="element">>cc_stack</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">] == </span><span class="identifier">FALSE</span><span class="plain">) </span><span class="identifier">allow</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
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<span class="identifier">inter_package</span><span class="plain"> *</span><span class="identifier">outer</span><span class="plain"> = </span><span class="identifier">Inter::Packages::container</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">outer</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) || (</span><span class="identifier">Inter::Packages::is_codelike</span><span class="plain">(</span><span class="identifier">outer</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">)) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">P</span><span class="plain">-></span><span class="identifier">W</span><span class="plain">.</span><span class="identifier">data</span><span class="plain">[</span><span class="identifier">ID_IFLD</span><span class="plain">] == </span><span class="identifier">SPLAT_IST</span><span class="plain">) {</span>
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<span class="identifier">text_stream</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain"> = </span><span class="identifier">Inter::Node::ID_to_text</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">P</span><span class="plain">-></span><span class="identifier">W</span><span class="plain">.</span><span class="identifier">data</span><span class="plain">[</span><span class="identifier">MATTER_SPLAT_IFLD</span><span class="plain">]);</span>
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<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">P</span><span class="plain">-></span><span class="identifier">W</span><span class="plain">.</span><span class="identifier">data</span><span class="plain">[</span><span class="identifier">PLM_SPLAT_IFLD</span><span class="plain">]) {</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="identifier">CONSTANT_PLM</span><span class="plain">:</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="identifier">GLOBAL_PLM</span><span class="plain">:</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="identifier">ARRAY_PLM</span><span class="plain">:</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="identifier">ROUTINE_PLM</span><span class="plain">:</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="identifier">DEFAULT_PLM</span><span class="plain">:</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="identifier">STUB_PLM</span><span class="plain">:</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">allow</span><span class="plain">) </span><<span class="cwebmacro">Symbol definition</span> <span class="cwebmacronumber">2.1</span>><span class="plain">;</span>
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<span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="identifier">IFDEF_PLM</span><span class="plain">: </span><<span class="cwebmacro">Deal with an IFDEF</span> <span class="cwebmacronumber">2.2</span>><span class="plain">; </span><span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="identifier">IFNDEF_PLM</span><span class="plain">: </span><<span class="cwebmacro">Deal with an IFNDEF</span> <span class="cwebmacronumber">2.3</span>><span class="plain">; </span><span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="identifier">IFTRUE_PLM</span><span class="plain">: </span><<span class="cwebmacro">Deal with an IFTRUE</span> <span class="cwebmacronumber">2.4</span>><span class="plain">; </span><span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="identifier">IFNOT_PLM</span><span class="plain">: </span><<span class="cwebmacro">Deal with an IFNOT</span> <span class="cwebmacronumber">2.5</span>><span class="plain">; </span><span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="identifier">ENDIF_PLM</span><span class="plain">: </span><<span class="cwebmacro">Deal with an ENDIF</span> <span class="cwebmacronumber">2.6</span>><span class="plain">; </span><span class="reserved">break</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="plain">}</span>
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<span class="plain">}</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">allow</span><span class="plain"> == </span><span class="identifier">FALSE</span><span class="plain">) </span><span class="identifier">Inter::Tree::remove_node</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">);</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function CodeGen::RCC::resolve is used in <a href="#SP1">§1</a>.</p>
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<p class="endnote">The function CodeGen::RCC::visitor appears nowhere else.</p>
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<p class="endnote">The structure rcc_state is private to this section.</p>
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<p class="inwebparagraph"><a id="SP_1"></a><b>§.1. </b><code class="display">
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<<span class="cwebmacrodefn">Extract second token into ident</span> <span class="cwebmacronumber">.1</span>> =
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</code></p>
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<pre class="displaydefn">
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">tcount</span><span class="plain"> = 0;</span>
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<span class="identifier">LOOP_THROUGH_TEXT</span><span class="plain">(</span><span class="identifier">pos</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">) {</span>
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<span class="identifier">wchar_t</span><span class="plain"> </span><span class="identifier">c</span><span class="plain"> = </span><span class="identifier">Str::get</span><span class="plain">(</span><span class="identifier">pos</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">' '</span><span class="plain">) || (</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'\</span><span class="plain">t</span><span class="character">'</span><span class="plain">) || (</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'\</span><span class="plain">n</span><span class="character">'</span><span class="plain">)) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">tcount</span><span class="plain"> == 1) </span><span class="identifier">tcount</span><span class="plain"> = 2;</span>
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<span class="reserved">else</span><span class="plain"> </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">tcount</span><span class="plain"> == 2) </span><span class="reserved">break</span><span class="plain">;</span>
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<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">tcount</span><span class="plain"> == 0) </span><span class="identifier">tcount</span><span class="plain"> = 1;</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">';'</span><span class="plain">) || (</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'-'</span><span class="plain">)) </span><span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">tcount</span><span class="plain"> == 2) </span><span class="identifier">PUT_TO</span><span class="plain">(</span><span class="identifier">ident</span><span class="plain">, </span><span class="identifier">c</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">This code is used in <a href="#SP2_1">§2.1</a>.</p>
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<p class="inwebparagraph"><a id="SP_1"></a><b>§.1. </b><code class="display">
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<<span class="cwebmacrodefn">Extract rest of text into ident</span> <span class="cwebmacronumber">.1</span>> =
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</code></p>
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<pre class="displaydefn">
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">tcount</span><span class="plain"> = 0;</span>
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<span class="identifier">LOOP_THROUGH_TEXT</span><span class="plain">(</span><span class="identifier">pos</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">) {</span>
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<span class="identifier">wchar_t</span><span class="plain"> </span><span class="identifier">c</span><span class="plain"> = </span><span class="identifier">Str::get</span><span class="plain">(</span><span class="identifier">pos</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">' '</span><span class="plain">) || (</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'\</span><span class="plain">t</span><span class="character">'</span><span class="plain">) || (</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'\</span><span class="plain">n</span><span class="character">'</span><span class="plain">)) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">tcount</span><span class="plain"> == 1) </span><span class="identifier">tcount</span><span class="plain"> = 2;</span>
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<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">tcount</span><span class="plain"> == 0) </span><span class="identifier">tcount</span><span class="plain"> = 1;</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">';'</span><span class="plain">) || (</span><span class="identifier">c</span><span class="plain"> == </span><span class="character">'-'</span><span class="plain">)) </span><span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">tcount</span><span class="plain"> == 2) </span><span class="identifier">PUT_TO</span><span class="plain">(</span><span class="identifier">ident</span><span class="plain">, </span><span class="identifier">c</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">This code is used in <a href="#SP2_2">§2.2</a>, <a href="#SP2_3">§2.3</a>, <a href="#SP2_4">§2.4</a>.</p>
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<p class="inwebparagraph"><a id="SP2_1"></a><b>§2.1. </b><code class="display">
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<<span class="cwebmacrodefn">Symbol definition</span> <span class="cwebmacronumber">2.1</span>> =
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</code></p>
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<pre class="displaydefn">
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<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">ident</span><span class="plain">);</span>
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<<span class="cwebmacro">Extract second token into ident</span> <span class="cwebmacronumber">.1</span>><span class="plain">;</span>
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<span class="identifier">LOGIF</span><span class="plain">(</span><span class="identifier">RESOLVING_CONDITIONAL_COMPILATION</span><span class="plain">, </span><span class="string">"I6 defines %S here\</span><span class="plain">n</span><span class="string">"</span><span class="plain">, </span><span class="identifier">ident</span><span class="plain">);</span>
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<span class="identifier">Dictionaries::create</span><span class="plain">(</span><span class="identifier">state</span><span class="plain">-</span><span class="element">>I6_level_symbols</span><span class="plain">, </span><span class="identifier">ident</span><span class="plain">);</span>
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<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">ident</span><span class="plain">);</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">This code is used in <a href="#SP2">§2</a>.</p>
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<p class="inwebparagraph"><a id="SP2_2"></a><b>§2.2. </b><code class="display">
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<<span class="cwebmacrodefn">Deal with an IFDEF</span> <span class="cwebmacronumber">2.2</span>> =
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</code></p>
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<pre class="displaydefn">
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<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">ident</span><span class="plain">);</span>
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<<span class="cwebmacro">Extract rest of text into ident</span> <span class="cwebmacronumber">.1</span>><span class="plain">;</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">result</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
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<span class="identifier">text_stream</span><span class="plain"> *</span><span class="identifier">symbol_name</span><span class="plain"> = </span><span class="identifier">ident</span><span class="plain">;</span>
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<<span class="cwebmacro">Decide whether symbol defined</span> <span class="cwebmacronumber">2.2.1</span>><span class="plain">;</span>
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<<span class="cwebmacro">Stack up the result</span> <span class="cwebmacronumber">2.2.2</span>><span class="plain">;</span>
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<span class="identifier">allow</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
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<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">ident</span><span class="plain">);</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">This code is used in <a href="#SP2">§2</a>.</p>
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<p class="inwebparagraph"><a id="SP2_3"></a><b>§2.3. </b><code class="display">
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<<span class="cwebmacrodefn">Deal with an IFNDEF</span> <span class="cwebmacronumber">2.3</span>> =
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</code></p>
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<pre class="displaydefn">
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<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">ident</span><span class="plain">);</span>
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<<span class="cwebmacro">Extract rest of text into ident</span> <span class="cwebmacronumber">.1</span>><span class="plain">;</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">result</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
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<span class="identifier">text_stream</span><span class="plain"> *</span><span class="identifier">symbol_name</span><span class="plain"> = </span><span class="identifier">ident</span><span class="plain">;</span>
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|
<<span class="cwebmacro">Decide whether symbol defined</span> <span class="cwebmacronumber">2.2.1</span>><span class="plain">;</span>
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|
<span class="identifier">result</span><span class="plain"> = (</span><span class="identifier">result</span><span class="plain">)?</span><span class="identifier">FALSE</span><span class="plain">:</span><span class="identifier">TRUE</span><span class="plain">;</span>
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<<span class="cwebmacro">Stack up the result</span> <span class="cwebmacronumber">2.2.2</span>><span class="plain">;</span>
|
|
<span class="identifier">allow</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
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|
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">ident</span><span class="plain">);</span>
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|
</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">This code is used in <a href="#SP2">§2</a>.</p>
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<p class="inwebparagraph"><a id="SP2_2_1"></a><b>§2.2.1. </b><code class="display">
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<<span class="cwebmacrodefn">Decide whether symbol defined</span> <span class="cwebmacronumber">2.2.1</span>> =
|
|
</code></p>
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<pre class="displaydefn">
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<span class="identifier">inter_symbol</span><span class="plain"> *</span><span class="identifier">symbol</span><span class="plain"> = </span><span class="identifier">Inter::SymbolsTables::symbol_from_name_in_main_or_basics</span><span class="plain">(</span><span class="identifier">I</span><span class="plain">, </span><span class="identifier">symbol_name</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">symbol</span><span class="plain">) {</span>
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<span class="identifier">result</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
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|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Inter::Symbols::is_extern</span><span class="plain">(</span><span class="identifier">symbol</span><span class="plain">)) </span><span class="identifier">result</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
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|
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Dictionaries::find</span><span class="plain">(</span><span class="identifier">state</span><span class="plain">-</span><span class="element">>I6_level_symbols</span><span class="plain">, </span><span class="identifier">symbol_name</span><span class="plain">)) </span><span class="identifier">result</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
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|
<span class="identifier">LOGIF</span><span class="plain">(</span><span class="identifier">RESOLVING_CONDITIONAL_COMPILATION</span><span class="plain">, </span><span class="string">"Must decide if %S defined: %s\</span><span class="plain">n</span><span class="string">"</span><span class="plain">, </span><span class="identifier">symbol_name</span><span class="plain">, (</span><span class="identifier">result</span><span class="plain">)?</span><span class="string">"yes"</span><span class="plain">:</span><span class="string">"no"</span><span class="plain">);</span>
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|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Log::aspect_switched_on</span><span class="plain">(</span><span class="constant">RESOLVING_CONDITIONAL_COMPILATION_DA</span><span class="plain">)) </span><span class="identifier">LOG_INDENT</span><span class="plain">;</span>
|
|
</pre>
|
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<p class="inwebparagraph"></p>
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<p class="endnote">This code is used in <a href="#SP2_2">§2.2</a>, <a href="#SP2_3">§2.3</a>.</p>
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<p class="inwebparagraph"><a id="SP2_4"></a><b>§2.4. </b><code class="display">
|
|
<<span class="cwebmacrodefn">Deal with an IFTRUE</span> <span class="cwebmacronumber">2.4</span>> =
|
|
</code></p>
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|
|
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<pre class="displaydefn">
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<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">ident</span><span class="plain">);</span>
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<<span class="cwebmacro">Extract rest of text into ident</span> <span class="cwebmacronumber">.1</span>><span class="plain">;</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">result</span><span class="plain"> = </span><span class="identifier">NOT_APPLICABLE</span><span class="plain">;</span>
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|
<span class="identifier">text_stream</span><span class="plain"> *</span><span class="identifier">cond</span><span class="plain"> = </span><span class="identifier">ident</span><span class="plain">;</span>
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|
<span class="identifier">match_results</span><span class="plain"> </span><span class="identifier">mr2</span><span class="plain"> = </span><span class="identifier">Regexp::create_mr</span><span class="plain">();</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Regexp::match</span><span class="plain">(&</span><span class="identifier">mr2</span><span class="plain">, </span><span class="identifier">cond</span><span class="plain">, </span><span class="identifier">L</span><span class="string">" *(%C+?) *== *(%d+) *"</span><span class="plain">)) {</span>
|
|
<span class="identifier">text_stream</span><span class="plain"> *</span><span class="identifier">identifier</span><span class="plain"> = </span><span class="identifier">mr2</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[0];</span>
|
|
<span class="identifier">inter_symbol</span><span class="plain"> *</span><span class="identifier">symbol</span><span class="plain"> = </span><span class="identifier">Inter::SymbolsTables::symbol_from_name_in_main_or_basics</span><span class="plain">(</span><span class="identifier">I</span><span class="plain">, </span><span class="identifier">identifier</span><span class="plain">);</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">symbol</span><span class="plain">) {</span>
|
|
<span class="identifier">inter_tree_node</span><span class="plain"> *</span><span class="identifier">P</span><span class="plain"> = </span><span class="identifier">Inter::Symbols::definition</span><span class="plain">(</span><span class="identifier">symbol</span><span class="plain">);</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">P</span><span class="plain">) &&</span>
|
|
<span class="plain">(</span><span class="identifier">P</span><span class="plain">-></span><span class="identifier">W</span><span class="plain">.</span><span class="identifier">data</span><span class="plain">[</span><span class="identifier">ID_IFLD</span><span class="plain">] == </span><span class="identifier">CONSTANT_IST</span><span class="plain">) &&</span>
|
|
<span class="plain">(</span><span class="identifier">P</span><span class="plain">-></span><span class="identifier">W</span><span class="plain">.</span><span class="identifier">data</span><span class="plain">[</span><span class="identifier">FORMAT_CONST_IFLD</span><span class="plain">] == </span><span class="identifier">CONSTANT_DIRECT</span><span class="plain">) &&</span>
|
|
<span class="plain">(</span><span class="identifier">P</span><span class="plain">-></span><span class="identifier">W</span><span class="plain">.</span><span class="identifier">data</span><span class="plain">[</span><span class="identifier">DATA_CONST_IFLD</span><span class="plain">] == </span><span class="identifier">LITERAL_IVAL</span><span class="plain">)) {</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">V</span><span class="plain"> = (</span><span class="reserved">int</span><span class="plain">) </span><span class="identifier">P</span><span class="plain">-></span><span class="identifier">W</span><span class="plain">.</span><span class="identifier">data</span><span class="plain">[</span><span class="identifier">DATA_CONST_IFLD</span><span class="plain"> + 1];</span>
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">W</span><span class="plain"> = </span><span class="identifier">Str::atoi</span><span class="plain">(</span><span class="identifier">mr2</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[1], 0);</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">V</span><span class="plain"> == </span><span class="identifier">W</span><span class="plain">) </span><span class="identifier">result</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">; </span><span class="reserved">else</span><span class="plain"> </span><span class="identifier">result</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="plain">}</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">result</span><span class="plain"> == </span><span class="identifier">NOT_APPLICABLE</span><span class="plain">) {</span>
|
|
<span class="functiontext">TemplateReader::error</span><span class="plain">(</span><span class="string">"conditional compilation is too difficult in the template: #iftrue on %S"</span><span class="plain">, </span><span class="identifier">cond</span><span class="plain">);</span>
|
|
<span class="identifier">result</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="identifier">LOGIF</span><span class="plain">(</span><span class="identifier">RESOLVING_CONDITIONAL_COMPILATION</span><span class="plain">, </span><span class="string">"Must decide if %S: "</span><span class="plain">, </span><span class="identifier">cond</span><span class="plain">);</span>
|
|
<span class="identifier">LOGIF</span><span class="plain">(</span><span class="identifier">RESOLVING_CONDITIONAL_COMPILATION</span><span class="plain">, </span><span class="string">"%s\</span><span class="plain">n</span><span class="string">"</span><span class="plain">, (</span><span class="identifier">result</span><span class="plain">)?</span><span class="string">"true"</span><span class="plain">:</span><span class="string">"false"</span><span class="plain">);</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Log::aspect_switched_on</span><span class="plain">(</span><span class="constant">RESOLVING_CONDITIONAL_COMPILATION_DA</span><span class="plain">)) </span><span class="identifier">LOG_INDENT</span><span class="plain">;</span>
|
|
<<span class="cwebmacro">Stack up the result</span> <span class="cwebmacronumber">2.2.2</span>><span class="plain">;</span>
|
|
<span class="identifier">allow</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">ident</span><span class="plain">);</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP2">§2</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP2_2_2"></a><b>§2.2.2. </b><code class="display">
|
|
<<span class="cwebmacrodefn">Stack up the result</span> <span class="cwebmacronumber">2.2.2</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">state</span><span class="plain">-</span><span class="element">>cc_sp</span><span class="plain"> >= </span><span class="constant">MAX_CC_STACK_SIZE</span><span class="plain">) {</span>
|
|
<span class="identifier">state</span><span class="plain">-</span><span class="element">>cc_sp</span><span class="plain"> = </span><span class="constant">MAX_CC_STACK_SIZE</span><span class="plain">; </span><span class="functiontext">TemplateReader::error</span><span class="plain">(</span><span class="string">"conditional compilation is wrongly structured in the template: too many nested #ifdef or #iftrue"</span><span class="plain">, </span><span class="identifier">NULL</span><span class="plain">);</span>
|
|
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> {</span>
|
|
<span class="identifier">state</span><span class="plain">-</span><span class="element">>cc_stack</span><span class="plain">[</span><span class="identifier">state</span><span class="plain">-</span><span class="element">>cc_sp</span><span class="plain">++] = </span><span class="identifier">result</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP2_2">§2.2</a>, <a href="#SP2_3">§2.3</a>, <a href="#SP2_4">§2.4</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP2_5"></a><b>§2.5. </b><code class="display">
|
|
<<span class="cwebmacrodefn">Deal with an IFNOT</span> <span class="cwebmacronumber">2.5</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="identifier">LOGIF</span><span class="plain">(</span><span class="identifier">RESOLVING_CONDITIONAL_COMPILATION</span><span class="plain">, </span><span class="string">"ifnot\</span><span class="plain">n</span><span class="string">"</span><span class="plain">);</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">state</span><span class="plain">-</span><span class="element">>cc_sp</span><span class="plain"> == 0) </span><span class="functiontext">TemplateReader::error</span><span class="plain">(</span><span class="string">"conditional compilation is wrongly structured in the template: #ifnot at top level"</span><span class="plain">, </span><span class="identifier">NULL</span><span class="plain">);</span>
|
|
<span class="reserved">else</span><span class="plain"> </span><span class="identifier">state</span><span class="plain">-</span><span class="element">>cc_stack</span><span class="plain">[</span><span class="identifier">state</span><span class="plain">-</span><span class="element">>cc_sp</span><span class="plain">-1] = (</span><span class="identifier">state</span><span class="plain">-</span><span class="element">>cc_stack</span><span class="plain">[</span><span class="identifier">state</span><span class="plain">-</span><span class="element">>cc_sp</span><span class="plain">-1])?</span><span class="identifier">FALSE</span><span class="plain">:</span><span class="identifier">TRUE</span><span class="plain">;</span>
|
|
<span class="identifier">allow</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP2">§2</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP2_6"></a><b>§2.6. </b><code class="display">
|
|
<<span class="cwebmacrodefn">Deal with an ENDIF</span> <span class="cwebmacronumber">2.6</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Log::aspect_switched_on</span><span class="plain">(</span><span class="constant">RESOLVING_CONDITIONAL_COMPILATION_DA</span><span class="plain">)) </span><span class="identifier">LOG_OUTDENT</span><span class="plain">;</span>
|
|
<span class="identifier">LOGIF</span><span class="plain">(</span><span class="identifier">RESOLVING_CONDITIONAL_COMPILATION</span><span class="plain">, </span><span class="string">"endif\</span><span class="plain">n</span><span class="string">"</span><span class="plain">);</span>
|
|
<span class="identifier">state</span><span class="plain">-</span><span class="element">>cc_sp</span><span class="plain">--;</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">state</span><span class="plain">-</span><span class="element">>cc_sp</span><span class="plain"> < 0) { </span><span class="identifier">state</span><span class="plain">-</span><span class="element">>cc_sp</span><span class="plain"> = 0; </span><span class="functiontext">TemplateReader::error</span><span class="plain">(</span><span class="string">"conditional compilation is wrongly structured in the template: too many #endif"</span><span class="plain">, </span><span class="identifier">NULL</span><span class="plain">); }</span>
|
|
<span class="identifier">allow</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP2">§2</a>.</p>
|
|
|
|
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<ul class="toc"><li><a href="2-plm.html">Back to 'Parse Linked Matter'</a></li><li><a href="2-alm.html">Continue with 'Assimilate Linked Matter'</a></li></ul><hr class="tocbar">
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