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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<title>Rules</title>
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<!--Weave of 'Rules' generated by Inweb-->
<div class="breadcrumbs">
<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../compiler.html">Inform7</a></li><li><a href="index.html">index</a></li><li><a href="index.html#2">Chapter 2: Indexing</a></li><li><b>Rules</b></li></ul></div>
<p class="purpose">To index rules and rulebooks.</p>
<ul class="toc"><li><a href="2-rls.html#SP1">&#167;1. Indexing</a></li><li><a href="2-rls.html#SP3">&#167;3. Indexing of lists</a></li><li><a href="2-rls.html#SP8">&#167;8. Affected by placements</a></li><li><a href="2-rls.html#SP9">&#167;9. Rule contexts</a></li></ul><hr class="tocbar">
<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>&#167;1. Indexing. </b>Some rules are provided with index text:
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">typedef</span><span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">rule_indexing_data</span><span class="plain-syntax"> {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">italicised_text</span><span class="plain-syntax">; </span><span class="comment-syntax"> when indexing a rulebook</span>
<span class="plain-syntax">} </span><span class="reserved-syntax">rule_indexing_data</span><span class="plain-syntax">;</span>
<span class="reserved-syntax">rule_indexing_data</span><span class="plain-syntax"> </span><span class="function-syntax">IXRules::new_indexing_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">rule</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">rule_indexing_data</span><span class="plain-syntax"> </span><span class="identifier-syntax">rid</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rid</span><span class="plain-syntax">.</span><span class="element-syntax">italicised_text</span><span class="plain-syntax"> = </span><span class="identifier-syntax">EMPTY_WORDING</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">rid</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">IXRules::set_italicised_index_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">rule</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">W</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">indexing_data</span><span class="plain-syntax">.</span><span class="element-syntax">italicised_text</span><span class="plain-syntax"> = </span><span class="identifier-syntax">W</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<ul class="endnotetexts"><li>The structure rule_indexing_data is private to this section.</li></ul>
<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>&#167;2. </b>And off we go:
</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">IXRules::index</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">IXRules::index</span></span>:<br/><a href="2-rls.html#SP3">&#167;3</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="identifier-syntax">rule</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="identifier-syntax">owner</span><span class="plain-syntax">, </span><span class="reserved-syntax">rule_context</span><span class="plain-syntax"> </span><span class="identifier-syntax">rc</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">no_responses_indexed</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">Wordings::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">indexing_data</span><span class="plain-syntax">.</span><span class="element-syntax">italicised_text</span><span class="plain-syntax">)) </span><span class="named-paragraph-container code-font"><a href="2-rls.html#SP2_1" class="named-paragraph-link"><span class="named-paragraph">Index the italicised text to do with the rule</span><span class="named-paragraph-number">2.1</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">Wordings::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">name</span><span class="plain-syntax">)) </span><span class="named-paragraph-container code-font"><a href="2-rls.html#SP2_2" class="named-paragraph-link"><span class="named-paragraph">Index the rule name along with Javascript buttons</span><span class="named-paragraph-number">2.2</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">Wordings::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">indexing_data</span><span class="plain-syntax">.</span><span class="element-syntax">italicised_text</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) &amp;&amp;</span>
<span class="plain-syntax"> (</span><span class="identifier-syntax">Wordings::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">name</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">defn_as_I7_source</span><span class="plain-syntax">))</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rls.html#SP2_4" class="named-paragraph-link"><span class="named-paragraph">Index some text extracted from the first line of the otherwise anonymous rule</span><span class="named-paragraph-number">2.4</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rls.html#SP2_5" class="named-paragraph-link"><span class="named-paragraph">Index a link to the first line of the rule's definition</span><span class="named-paragraph-number">2.5</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">global_compilation_settings</span><span class="plain-syntax">.</span><span class="identifier-syntax">number_rules_in_index</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-rls.html#SP2_6" class="named-paragraph-link"><span class="named-paragraph">Index the small type rule numbering</span><span class="named-paragraph-number">2.6</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rls.html#SP2_7" class="named-paragraph-link"><span class="named-paragraph">Index any applicability conditions</span><span class="named-paragraph-number">2.7</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-rls.html#SP2_3" class="named-paragraph-link"><span class="named-paragraph">Index any response texts in the rule</span><span class="named-paragraph-number">2.3</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">no_responses_indexed</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP2_1" class="paragraph-anchor"></a><b>&#167;2.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Index the italicised text to do with the rule</span><span class="named-paragraph-number">2.1</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">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&lt;i&gt;%+W"</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">indexing_data</span><span class="plain-syntax">.</span><span class="element-syntax">italicised_text</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> #</span><span class="identifier-syntax">ifdef</span><span class="plain-syntax"> </span><span class="identifier-syntax">IF_MODULE</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">rc</span><span class="plain-syntax">.</span><span class="identifier-syntax">scene_context</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" during "</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">SW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Scenes::get_name</span><span class="plain-syntax">(</span><span class="identifier-syntax">rc</span><span class="plain-syntax">.</span><span class="element-syntax">scene_context</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%+W"</span><span class="plain-syntax">, </span><span class="identifier-syntax">SW</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> #</span><span class="identifier-syntax">endif</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&lt;/i&gt;&amp;nbsp;&amp;nbsp;"</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-rls.html#SP2">&#167;2</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP2_2" class="paragraph-anchor"></a><b>&#167;2.2. </b></p>
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="constant-syntax">MAX_PASTEABLE_RULE_NAME_LENGTH</span><span class="plain-syntax"> </span><span class="constant-syntax">500</span>
</pre>
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Index the rule name along with Javascript buttons</span><span class="named-paragraph-number">2.2</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">HTML::begin_colour</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"800000"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%+W"</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">name</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML::end_colour</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&amp;nbsp;&amp;nbsp;"</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">S</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">S</span><span class="plain-syntax">, </span><span class="string-syntax">"%+W"</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">name</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">PasteButtons::paste_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&amp;nbsp;&lt;i&gt;name&lt;/i&gt; "</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Str::clear</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</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">S</span><span class="plain-syntax">, </span><span class="string-syntax">"The %W is not listed in the %W rulebook.\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">name</span><span class="plain-syntax">, </span><span class="identifier-syntax">owner</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">primary_name</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">PasteButtons::paste_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&amp;nbsp;&lt;i&gt;unlist&lt;/i&gt;"</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">S</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">l</span><span class="plain-syntax">, </span><span class="identifier-syntax">c</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">l</span><span class="plain-syntax">=0, </span><span class="identifier-syntax">c</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">l</span><span class="plain-syntax">&lt;26; </span><span class="identifier-syntax">l</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">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">responses</span><span class="plain-syntax">[</span><span class="identifier-syntax">l</span><span class="plain-syntax">].</span><span class="identifier-syntax">message</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">c</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">c</span><span class="plain-syntax"> &gt; </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&amp;nbsp;&amp;nbsp;"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Index::extra_link_with</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="constant-syntax">1000000</span><span class="plain-syntax">+</span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">allocation_id</span><span class="plain-syntax">, </span><span class="string-syntax">"responses"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%d"</span><span class="plain-syntax">, </span><span class="identifier-syntax">c</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> }</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-rls.html#SP2">&#167;2</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP2_3" class="paragraph-anchor"></a><b>&#167;2.3. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Index any response texts in the rule</span><span class="named-paragraph-number">2.3</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">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">l</span><span class="plain-syntax">, </span><span class="identifier-syntax">c</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">l</span><span class="plain-syntax">=0, </span><span class="identifier-syntax">c</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">l</span><span class="plain-syntax">&lt;26; </span><span class="identifier-syntax">l</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">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">responses</span><span class="plain-syntax">[</span><span class="identifier-syntax">l</span><span class="plain-syntax">].</span><span class="identifier-syntax">message</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">c</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">Index::extra_div_open_nested</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="constant-syntax">1000000</span><span class="plain-syntax">+</span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">allocation_id</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">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">HTML_TAG</span><span class="plain-syntax">(</span><span class="string-syntax">"br"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-rls.html#SP10" class="function-link"><span class="function-syntax">IXRules::index_response</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">l</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">responses</span><span class="plain-syntax">[</span><span class="identifier-syntax">l</span><span class="plain-syntax">].</span><span class="identifier-syntax">message</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">c</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">c</span><span class="plain-syntax"> &gt; </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">Index::extra_div_close_nested</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">no_responses_indexed</span><span class="plain-syntax"> = </span><span class="identifier-syntax">c</span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-rls.html#SP2">&#167;2</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP2_4" class="paragraph-anchor"></a><b>&#167;2.4. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Index some text extracted from the first line of the otherwise anonymous rule</span><span class="named-paragraph-number">2.4</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">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">defn_as_I7_source</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">at</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">down</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">) &amp;&amp; (</span><span class="identifier-syntax">Wordings::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">pn</span><span class="plain-syntax">)))) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"(%+W"</span><span class="plain-syntax">, </span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">pn</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">-&gt;</span><span class="element-syntax">next</span><span class="plain-syntax">) </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"; ..."</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-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-rls.html#SP2">&#167;2</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP2_5" class="paragraph-anchor"></a><b>&#167;2.5. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Index a link to the first line of the rule's definition</span><span class="named-paragraph-number">2.5</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">defn_as_I7_source</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">defn_as_I7_source</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">at</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">) &amp;&amp; (</span><span class="identifier-syntax">Wordings::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">pn</span><span class="plain-syntax">))))</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Index::link</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">Wordings::first_wn</span><span class="plain-syntax">(</span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">pn</span><span class="plain-syntax">)));</span>
<span class="plain-syntax"> }</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-rls.html#SP2">&#167;2</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP2_6" class="paragraph-anchor"></a><b>&#167;2.6. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Index the small type rule numbering</span><span class="named-paragraph-number">2.6</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" "</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_OPEN_WITH</span><span class="plain-syntax">(</span><span class="string-syntax">"span"</span><span class="plain-syntax">, </span><span class="string-syntax">"class=\"smaller\""</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">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">defn_as_I7_source</span><span class="plain-syntax">) </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%d"</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">defn_as_I7_source</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">allocation_id</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">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"primitive"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"span"</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-rls.html#SP2">&#167;2</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP2_7" class="paragraph-anchor"></a><b>&#167;2.7. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Index any applicability conditions</span><span class="named-paragraph-number">2.7</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="identifier-syntax">applicability_constraint</span><span class="plain-syntax"> *</span><span class="identifier-syntax">acl</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LINKED_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">acl</span><span class="plain-syntax">, </span><span class="identifier-syntax">applicability_constraint</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">applicability_constraints</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_TAG</span><span class="plain-syntax">(</span><span class="string-syntax">"br"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Index::link</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">Wordings::first_wn</span><span class="plain-syntax">(</span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">acl</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">where_imposed</span><span class="plain-syntax">)));</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&amp;nbsp;%+W"</span><span class="plain-syntax">, </span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">acl</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">where_imposed</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> }</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-rls.html#SP2">&#167;2</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>&#167;3. Indexing of lists. </b>There's a division of labour: here we arrange the index of the rules and
show the linkage between them, while the actual content for each rule is
handled in the "Rules" section.
</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">IXRules::index_booking_list</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">IXRules::index_booking_list</span></span>:<br/><a href="2-rls.html#SP7">&#167;7</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="identifier-syntax">booking_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">L</span><span class="plain-syntax">, </span><span class="reserved-syntax">rule_context</span><span class="plain-syntax"> </span><span class="identifier-syntax">rc</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">char</span><span class="plain-syntax"> *</span><span class="identifier-syntax">billing</span><span class="plain-syntax">, </span><span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="identifier-syntax">owner</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">resp_count</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">booking</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">count</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">LOOP_OVER_BOOKINGS</span><span class="plain-syntax">(</span><span class="identifier-syntax">br</span><span class="plain-syntax">, </span><span class="identifier-syntax">L</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rule</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax"> = </span><span class="identifier-syntax">RuleBookings::get_rule</span><span class="plain-syntax">(</span><span class="identifier-syntax">br</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">skip</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">ifdef</span><span class="plain-syntax"> </span><span class="identifier-syntax">IF_MODULE</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">imperative_defn</span><span class="plain-syntax"> *</span><span class="identifier-syntax">id</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Rules::get_imperative_definition</span><span class="plain-syntax">(</span><span class="identifier-syntax">R</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">id</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">id_body</span><span class="plain-syntax"> *</span><span class="identifier-syntax">idb</span><span class="plain-syntax"> = </span><span class="identifier-syntax">id</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">body_of_defn</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">id_runtime_context_data</span><span class="plain-syntax"> *</span><span class="identifier-syntax">phrcd</span><span class="plain-syntax"> = &amp;(</span><span class="identifier-syntax">idb</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">runtime_context_data</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">scene</span><span class="plain-syntax"> *</span><span class="identifier-syntax">during_scene</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Scenes::rcd_scene</span><span class="plain-syntax">(</span><span class="identifier-syntax">phrcd</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">rc</span><span class="plain-syntax">.</span><span class="element-syntax">scene_context</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">during_scene</span><span class="plain-syntax"> != </span><span class="identifier-syntax">rc</span><span class="plain-syntax">.</span><span class="element-syntax">scene_context</span><span class="plain-syntax">)) </span><span class="identifier-syntax">skip</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">rc</span><span class="plain-syntax">.</span><span class="element-syntax">action_context</span><span class="plain-syntax">) &amp;&amp;</span>
<span class="plain-syntax"> (</span><span class="identifier-syntax">ActionRules::within_action_context</span><span class="plain-syntax">(</span><span class="identifier-syntax">phrcd</span><span class="plain-syntax">, </span><span class="identifier-syntax">rc</span><span class="plain-syntax">.</span><span class="element-syntax">action_context</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">skip</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">endif</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">skip</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">count</span><span class="plain-syntax">++;</span>
<span class="plain-syntax"> </span><a href="2-rls.html#SP4" class="function-link"><span class="function-syntax">IXRules::br_start_index_line</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">prev</span><span class="plain-syntax">, </span><span class="identifier-syntax">billing</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> *</span><span class="identifier-syntax">resp_count</span><span class="plain-syntax"> += </span><a href="2-rls.html#SP2" class="function-link"><span class="function-syntax">IXRules::index</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">owner</span><span class="plain-syntax">, </span><span class="identifier-syntax">rc</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">br</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">count</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>&#167;4. </b>The "index links" are not hypertextual: they're the little icons showing
the order of precedence of rules in the list. On some index pages we don't
want this, so:
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">show_index_links</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">IXRules::list_suppress_indexed_links</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">IXRules::list_suppress_indexed_links</span></span>:<br/><a href="2-rls.html#SP7">&#167;7</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">show_index_links</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">void</span><span class="plain-syntax"> </span><span class="function-syntax">IXRules::list_resume_indexed_links</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">IXRules::list_resume_indexed_links</span></span>:<br/><a href="2-rls.html#SP7">&#167;7</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">show_index_links</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">void</span><span class="plain-syntax"> </span><span class="function-syntax">IXRules::br_start_index_line</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">IXRules::br_start_index_line</span></span>:<br/><a href="2-rls.html#SP3">&#167;3</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="identifier-syntax">booking</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prev</span><span class="plain-syntax">, </span><span class="reserved-syntax">char</span><span class="plain-syntax"> *</span><span class="identifier-syntax">billing</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML::open_indented_p</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="constant-syntax">2</span><span class="plain-syntax">, </span><span class="string-syntax">"hanging"</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">billing</span><span class="plain-syntax">[0]) &amp;&amp; (</span><span class="identifier-syntax">show_index_links</span><span class="plain-syntax">)) </span><a href="2-rls.html#SP5" class="function-link"><span class="function-syntax">IXRules::br_show_linkage_icon</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</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">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%s"</span><span class="plain-syntax">, </span><span class="identifier-syntax">billing</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;"</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">billing</span><span class="plain-syntax">[0] == </span><span class="constant-syntax">0</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">show_index_links</span><span class="plain-syntax">)) </span><a href="2-rls.html#SP5" class="function-link"><span class="function-syntax">IXRules::br_show_linkage_icon</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">prev</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP5" class="paragraph-anchor"></a><b>&#167;5. </b>And here's how the index links (if wanted) are chosen and plotted:
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">IXRules::br_show_linkage_icon</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">IXRules::br_show_linkage_icon</span></span>:<br/><a href="2-rls.html#SP4">&#167;4</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="identifier-syntax">booking</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">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">icon_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="comment-syntax"> redundant assignment to appease </span><span class="extract"><span class="extract-syntax">gcc -O2</span></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">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">prev</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">commentary</span><span class="plain-syntax">.</span><span class="identifier-syntax">tooltip_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="identifier-syntax">HTML::icon_with_tooltip</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"inform:/doc_images/rulenone.png"</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="string-syntax">"start of rulebook"</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="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax"> (</span><span class="identifier-syntax">prev</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">commentary</span><span class="plain-syntax">.</span><span class="identifier-syntax">next_rule_specificity</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> -1: </span><span class="identifier-syntax">icon_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"inform:/doc_images/ruleless.png"</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="constant-syntax">0</span><span class="plain-syntax">: </span><span class="identifier-syntax">icon_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"inform:/doc_images/ruleequal.png"</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="constant-syntax">1</span><span class="plain-syntax">: </span><span class="identifier-syntax">icon_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"inform:/doc_images/rulemore.png"</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">default:</span><span class="plain-syntax"> </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"unknown rule specificity"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML::icon_with_tooltip</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">icon_name</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">prev</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">commentary</span><span class="plain-syntax">.</span><span class="identifier-syntax">tooltip_text</span><span class="plain-syntax">, </span><span class="identifier-syntax">prev</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">commentary</span><span class="plain-syntax">.</span><span class="identifier-syntax">law_applied</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP6" class="paragraph-anchor"></a><b>&#167;6. </b></p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">unique_xtra_no</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
</pre>
<p class="commentary firstcommentary"><a id="SP7" class="paragraph-anchor"></a><b>&#167;7. </b></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">IXRules::index_rulebook</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="identifier-syntax">rb</span><span class="plain-syntax">, </span><span class="reserved-syntax">char</span><span class="plain-syntax"> *</span><span class="identifier-syntax">billing</span><span class="plain-syntax">, </span><span class="reserved-syntax">rule_context</span><span class="plain-syntax"> </span><span class="identifier-syntax">rc</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">resp_count</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">suppress_outcome</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">rb</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="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">billing</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"No billing for rb index"</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">billing</span><span class="plain-syntax">[0] != </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> #</span><span class="identifier-syntax">ifdef</span><span class="plain-syntax"> </span><span class="identifier-syntax">IF_MODULE</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">rc</span><span class="plain-syntax">.</span><span class="element-syntax">action_context</span><span class="plain-syntax">) </span><span class="identifier-syntax">suppress_outcome</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">endif</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">BookingLists::is_contextually_empty</span><span class="plain-syntax">(</span><span class="identifier-syntax">rb</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">contents</span><span class="plain-syntax">, </span><span class="identifier-syntax">rc</span><span class="plain-syntax">)) </span><span class="identifier-syntax">suppress_outcome</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">t</span><span class="plain-syntax"> = </span><a href="2-rls.html#SP3" class="function-link"><span class="function-syntax">IXRules::index_booking_list</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">rb</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">contents</span><span class="plain-syntax">, </span><span class="identifier-syntax">rc</span><span class="plain-syntax">, </span><span class="identifier-syntax">billing</span><span class="plain-syntax">, </span><span class="identifier-syntax">rb</span><span class="plain-syntax">, </span><span class="identifier-syntax">resp_count</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-rls.html#SP8" class="function-link"><span class="function-syntax">IXRules::index_outcomes</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, &amp;(</span><span class="identifier-syntax">rb</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">my_outcomes</span><span class="plain-syntax">), </span><span class="identifier-syntax">suppress_outcome</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-rls.html#SP8" class="function-link"><span class="function-syntax">IXRules::rb_index_placements</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">rb</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">t</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
<span class="plain-syntax">#</span><span class="identifier-syntax">ifdef</span><span class="plain-syntax"> </span><span class="identifier-syntax">IF_MODULE</span>
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">IXRules::index_action_rules</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">IXRules::index_action_rules</span></span>:<br/>Actions - <a href="3-act.html#SP1">&#167;1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="identifier-syntax">action_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">an</span><span class="plain-syntax">, </span><span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="identifier-syntax">rb</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">code</span><span class="plain-syntax">, </span><span class="reserved-syntax">char</span><span class="plain-syntax"> *</span><span class="identifier-syntax">desc</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">resp_count</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">t</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><a href="2-rls.html#SP4" class="function-link"><span class="function-syntax">IXRules::list_suppress_indexed_links</span></a><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">code</span><span class="plain-syntax"> &gt;= </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">t</span><span class="plain-syntax"> += </span><a href="2-rls.html#SP7" class="function-link"><span class="function-syntax">IXRules::index_rulebook</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">Rulebooks::std</span><span class="plain-syntax">(</span><span class="identifier-syntax">code</span><span class="plain-syntax">), </span><span class="identifier-syntax">desc</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><a href="2-rls.html#SP9" class="function-link"><span class="function-syntax">IXRules::action_context</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">an</span><span class="plain-syntax">), </span><span class="identifier-syntax">resp_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">rb</span><span class="plain-syntax">) </span><span class="identifier-syntax">t</span><span class="plain-syntax"> += </span><a href="2-rls.html#SP7" class="function-link"><span class="function-syntax">IXRules::index_rulebook</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">rb</span><span class="plain-syntax">, </span><span class="identifier-syntax">desc</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><a href="2-rls.html#SP9" class="function-link"><span class="function-syntax">IXRules::no_rule_context</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">resp_count</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-rls.html#SP4" class="function-link"><span class="function-syntax">IXRules::list_resume_indexed_links</span></a><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"> &gt; </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">HTML_TAG</span><span class="plain-syntax">(</span><span class="string-syntax">"br"</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
<span class="plain-syntax">#</span><span class="identifier-syntax">endif</span>
</pre>
<p class="commentary firstcommentary"><a id="SP8" class="paragraph-anchor"></a><b>&#167;8. Affected by placements. </b>The contents of rulebooks can be unexpected if sentences are used which
explicitly list, or unlist, rules. To make the index more useful in these
cases, we keep a linked list, for each rulebook, of all sentences which
have affected it in this way:
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">typedef</span><span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">rulebook_indexing_data</span><span class="plain-syntax"> {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">placement_affecting</span><span class="plain-syntax"> *</span><span class="identifier-syntax">placement_list</span><span class="plain-syntax">; </span><span class="comment-syntax"> linked list of explicit placements</span>
<span class="plain-syntax">} </span><span class="reserved-syntax">rulebook_indexing_data</span><span class="plain-syntax">;</span>
<span class="reserved-syntax">typedef</span><span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">placement_affecting</span><span class="plain-syntax"> {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">placement_sentence</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">placement_affecting</span><span class="plain-syntax"> *</span><span class="identifier-syntax">next</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">CLASS_DEFINITION</span>
<span class="plain-syntax">} </span><span class="reserved-syntax">placement_affecting</span><span class="plain-syntax">;</span>
<span class="reserved-syntax">rulebook_indexing_data</span><span class="plain-syntax"> </span><span class="function-syntax">IXRules::new_rulebook_indexing_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="identifier-syntax">RB</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">rulebook_indexing_data</span><span class="plain-syntax"> </span><span class="identifier-syntax">rid</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rid</span><span class="plain-syntax">.</span><span class="element-syntax">placement_list</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">rid</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">IXRules::affected_by_placement</span><span class="plain-syntax">(</span><span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="identifier-syntax">rb</span><span class="plain-syntax">, </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">where</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">placement_affecting</span><span class="plain-syntax"> *</span><span class="identifier-syntax">npl</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CREATE</span><span class="plain-syntax">(</span><span class="reserved-syntax">placement_affecting</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">npl</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">placement_sentence</span><span class="plain-syntax"> = </span><span class="identifier-syntax">where</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">npl</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">next</span><span class="plain-syntax"> = </span><span class="identifier-syntax">rb</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">indexing_data</span><span class="plain-syntax">.</span><span class="element-syntax">placement_list</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rb</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">indexing_data</span><span class="plain-syntax">.</span><span class="element-syntax">placement_list</span><span class="plain-syntax"> = </span><span class="identifier-syntax">npl</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">IXRules::rb_no_placements</span><span class="plain-syntax">(</span><span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="identifier-syntax">rb</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">t</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">placement_affecting</span><span class="plain-syntax"> *</span><span class="identifier-syntax">npl</span><span class="plain-syntax"> = </span><span class="identifier-syntax">rb</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">indexing_data</span><span class="plain-syntax">.</span><span class="element-syntax">placement_list</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">npl</span><span class="plain-syntax">) { </span><span class="identifier-syntax">t</span><span class="plain-syntax">++; </span><span class="identifier-syntax">npl</span><span class="plain-syntax"> = </span><span class="identifier-syntax">npl</span><span class="plain-syntax">-&gt;</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">t</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">IXRules::rb_index_placements</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">IXRules::rb_index_placements</span></span>:<br/><a href="2-rls.html#SP7">&#167;7</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="identifier-syntax">rulebook</span><span class="plain-syntax"> *</span><span class="identifier-syntax">rb</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">placement_affecting</span><span class="plain-syntax"> *</span><span class="identifier-syntax">npl</span><span class="plain-syntax"> = </span><span class="identifier-syntax">rb</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">indexing_data</span><span class="plain-syntax">.</span><span class="element-syntax">placement_list</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">npl</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_OPEN_WITH</span><span class="plain-syntax">(</span><span class="string-syntax">"span"</span><span class="plain-syntax">, </span><span class="string-syntax">"class=\"smaller\""</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&lt;i&gt;NB:&lt;/i&gt; %W"</span><span class="plain-syntax">, </span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">npl</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">placement_sentence</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Index::link</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">Wordings::first_wn</span><span class="plain-syntax">(</span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">npl</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">placement_sentence</span><span class="plain-syntax">)));</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"span"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_TAG</span><span class="plain-syntax">(</span><span class="string-syntax">"br"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">npl</span><span class="plain-syntax"> = </span><span class="identifier-syntax">npl</span><span class="plain-syntax">-&gt;</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">void</span><span class="plain-syntax"> </span><span class="function-syntax">IXRules::index_outcomes</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">IXRules::index_outcomes</span></span>:<br/><a href="2-rls.html#SP7">&#167;7</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="identifier-syntax">outcomes</span><span class="plain-syntax"> *</span><span class="identifier-syntax">outs</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">suppress_outcome</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">suppress_outcome</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">rulebook_outcome</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ro</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LINKED_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">ro</span><span class="plain-syntax">, </span><span class="identifier-syntax">rulebook_outcome</span><span class="plain-syntax">, </span><span class="identifier-syntax">outs</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">named_outcomes</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">named_rulebook_outcome</span><span class="plain-syntax"> *</span><span class="identifier-syntax">rbno</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ro</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">outcome_name</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML::open_indented_p</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="constant-syntax">2</span><span class="plain-syntax">, </span><span class="string-syntax">"hanging"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&lt;i&gt;outcome&lt;/i&gt;&amp;nbsp;&amp;nbsp;"</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">outs</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">default_named_outcome</span><span class="plain-syntax"> == </span><span class="identifier-syntax">ro</span><span class="plain-syntax">) </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&lt;b&gt;"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%+W"</span><span class="plain-syntax">, </span><span class="identifier-syntax">Nouns::nominative_singular</span><span class="plain-syntax">(</span><span class="identifier-syntax">rbno</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">name</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">outs</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">default_named_outcome</span><span class="plain-syntax"> == </span><span class="identifier-syntax">ro</span><span class="plain-syntax">) </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&lt;/b&gt; (default)"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" - &lt;i&gt;"</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">ro</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">kind_of_outcome</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">SUCCESS_OUTCOME:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"a success"</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">FAILURE_OUTCOME:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"a failure"</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">NO_OUTCOME:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"no outcome"</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">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&lt;/i&gt;"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</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">outs</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">default_named_outcome</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) &amp;&amp;</span>
<span class="plain-syntax"> (</span><span class="identifier-syntax">outs</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">default_rule_outcome</span><span class="plain-syntax"> != </span><span class="identifier-syntax">NO_OUTCOME</span><span class="plain-syntax">) &amp;&amp;</span>
<span class="plain-syntax"> (</span><span class="identifier-syntax">suppress_outcome</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">HTML::open_indented_p</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="constant-syntax">2</span><span class="plain-syntax">, </span><span class="string-syntax">"hanging"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&lt;i&gt;default outcome is&lt;/i&gt; "</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">outs</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">default_rule_outcome</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">SUCCESS_OUTCOME:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"success"</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">FAILURE_OUTCOME:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"failure"</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">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax">}</span>
</pre>
<ul class="endnotetexts"><li>The structure rulebook_indexing_data is private to this section.</li><li>The structure placement_affecting is accessed in 2/ins, 2/act, 4/em and here.</li></ul>
<p class="commentary firstcommentary"><a id="SP9" class="paragraph-anchor"></a><b>&#167;9. Rule contexts. </b>These are mainly (only?) used in indexing, as a way to represent the idea of
being the relevant scene or action for a rule.
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">typedef</span><span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">rule_context</span><span class="plain-syntax"> {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">action_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">action_context</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">scene</span><span class="plain-syntax"> *</span><span class="identifier-syntax">scene_context</span><span class="plain-syntax">;</span>
<span class="plain-syntax">} </span><span class="reserved-syntax">rule_context</span><span class="plain-syntax">;</span>
<span class="reserved-syntax">rule_context</span><span class="plain-syntax"> </span><span class="function-syntax">IXRules::action_context</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">IXRules::action_context</span></span>:<br/><a href="2-rls.html#SP7">&#167;7</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">action_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">an</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">rule_context</span><span class="plain-syntax"> </span><span class="identifier-syntax">rc</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rc</span><span class="plain-syntax">.</span><span class="element-syntax">action_context</span><span class="plain-syntax"> = </span><span class="identifier-syntax">an</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rc</span><span class="plain-syntax">.</span><span class="element-syntax">scene_context</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">rc</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">rule_context</span><span class="plain-syntax"> </span><span class="function-syntax">IXRules::scene_context</span><span class="plain-syntax">(</span><span class="identifier-syntax">scene</span><span class="plain-syntax"> *</span><span class="identifier-syntax">s</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">rule_context</span><span class="plain-syntax"> </span><span class="identifier-syntax">rc</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rc</span><span class="plain-syntax">.</span><span class="element-syntax">action_context</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">rc</span><span class="plain-syntax">.</span><span class="element-syntax">scene_context</span><span class="plain-syntax"> = </span><span class="identifier-syntax">s</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">rc</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">rule_context</span><span class="plain-syntax"> </span><span class="function-syntax">IXRules::no_rule_context</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">IXRules::no_rule_context</span></span>:<br/><a href="2-rls.html#SP7">&#167;7</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">rule_context</span><span class="plain-syntax"> </span><span class="identifier-syntax">rc</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rc</span><span class="plain-syntax">.</span><span class="element-syntax">action_context</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">rc</span><span class="plain-syntax">.</span><span class="element-syntax">scene_context</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">rc</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">IXRules::phrase_fits_rule_context</span><span class="plain-syntax">(</span><span class="identifier-syntax">id_body</span><span class="plain-syntax"> *</span><span class="identifier-syntax">idb</span><span class="plain-syntax">, </span><span class="reserved-syntax">rule_context</span><span class="plain-syntax"> </span><span class="identifier-syntax">rc</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">rc</span><span class="plain-syntax">.</span><span class="identifier-syntax">scene_context</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">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">idb</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">Scenes::rcd_scene</span><span class="plain-syntax">(&amp;(</span><span class="identifier-syntax">idb</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">runtime_context_data</span><span class="plain-syntax">)) != </span><span class="identifier-syntax">rc</span><span class="plain-syntax">.</span><span class="element-syntax">scene_context</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<ul class="endnotetexts"><li>The structure rule_context is private to this section.</li></ul>
<p class="commentary firstcommentary"><a id="SP10" class="paragraph-anchor"></a><b>&#167;10. </b>When we index a response, we also provide a paste button for the source
text to assert a change:
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">IXRules::index_response</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">IXRules::index_response</span></span>:<br/><a href="2-rls.html#SP2_3">&#167;2.3</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="identifier-syntax">rule</span><span class="plain-syntax"> *</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">marker</span><span class="plain-syntax">, </span><span class="identifier-syntax">response_message</span><span class="plain-syntax"> *</span><span class="identifier-syntax">resp</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_OPEN_WITH</span><span class="plain-syntax">(</span><span class="string-syntax">"span"</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><span class="string-syntax">"style=\"color: #ffffff; "</span>
<span class="plain-syntax"> </span><span class="string-syntax">"font-family: 'Courier New', Courier, monospace; background-color: #8080ff;\""</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&amp;nbsp;&amp;nbsp;%c&amp;nbsp;&amp;nbsp; "</span><span class="plain-syntax">, </span><span class="character-syntax">'A'</span><span class="plain-syntax"> + </span><span class="identifier-syntax">marker</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"span"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_OPEN_WITH</span><span class="plain-syntax">(</span><span class="string-syntax">"span"</span><span class="plain-syntax">, </span><span class="string-syntax">"style=\"color: #000066;\""</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%+W"</span><span class="plain-syntax">, </span><span class="identifier-syntax">resp</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">the_ts</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">unsubstituted_text</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"span"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&amp;nbsp;&amp;nbsp;"</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">S</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">S</span><span class="plain-syntax">, </span><span class="string-syntax">"%+W response (%c)"</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">name</span><span class="plain-syntax">, </span><span class="character-syntax">'A'</span><span class="plain-syntax"> + </span><span class="identifier-syntax">marker</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">PasteButtons::paste_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&amp;nbsp;&lt;i&gt;name&lt;/i&gt;"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&amp;nbsp;"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">Str::clear</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</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">S</span><span class="plain-syntax">, </span><span class="string-syntax">"The %+W response (%c) is \"New text.\"."</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">PasteButtons::paste_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">S</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&amp;nbsp;&lt;i&gt;set&lt;/i&gt;"</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">S</span><span class="plain-syntax">)</span>
<span class="plain-syntax">}</span>
</pre>
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