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<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#3">Chapter 3: Indexing for Plugins</a></li><li><b>Spatial</b></li></ul></div>
<p class="purpose">Indexing functions for the spatial structure of the world model.</p>
<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>&#167;1. </b></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">IXSpatial::index_spatial_relationship</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">IXSpatial::index_spatial_relationship</span></span>:<br/>Index Physical World - <a href="2-ipw.html#SP3_1">&#167;3.1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="identifier-syntax">instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">char</span><span class="plain-syntax"> *</span><span class="identifier-syntax">rel</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">instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Spatial::progenitor</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="comment-syntax"> we could set </span><span class="extract"><span class="extract-syntax">rel</span></span><span class="comment-syntax"> to "in" here, but the index omits that for clarity</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Instances::of_kind</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">K_supporter</span><span class="plain-syntax">)) </span><span class="identifier-syntax">rel</span><span class="plain-syntax"> = </span><span class="string-syntax">"on"</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">Instances::of_kind</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">K_person</span><span class="plain-syntax">)) </span><span class="identifier-syntax">rel</span><span class="plain-syntax"> = </span><span class="string-syntax">"carried"</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">SPATIAL_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">)-&gt;</span><span class="identifier-syntax">part_flag</span><span class="plain-syntax">) </span><span class="identifier-syntax">rel</span><span class="plain-syntax"> = </span><span class="string-syntax">"part"</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inference</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inf</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">POSITIVE_KNOWLEDGE_LOOP</span><span class="plain-syntax">(</span><span class="identifier-syntax">inf</span><span class="plain-syntax">, </span><span class="identifier-syntax">Instances::as_subject</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">), </span><span class="identifier-syntax">property_inf</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">PropertyInferences::get_property</span><span class="plain-syntax">(</span><span class="identifier-syntax">inf</span><span class="plain-syntax">) == </span><span class="identifier-syntax">P_worn</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rel</span><span class="plain-syntax"> = </span><span class="string-syntax">"worn"</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">rel</span><span class="plain-syntax">) </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"&lt;i&gt;%s&lt;/i&gt; "</span><span class="plain-syntax">, </span><span class="identifier-syntax">rel</span><span class="plain-syntax">);</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>&#167;2. </b>If something is a part, we don't detail it on the World index page, since
it already turns up under its owner.
</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">IXSpatial::no_detail_index</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">IXSpatial::no_detail_index</span></span>:<br/>Index Physical World - <a href="2-ipw.html#SP2_1">&#167;2.1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">SPATIAL_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">)-&gt;</span><span class="identifier-syntax">incorp_tree_parent</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>&#167;3. </b>In the World index, we recurse to show the contents and parts:
</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">IXSpatial::index_object_further</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">IXSpatial::index_object_further</span></span>:<br/>Index Physical World - <a href="2-ipw.html#SP3_6">&#167;3.6</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="identifier-syntax">instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">depth</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">details</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">depth</span><span class="plain-syntax"> &gt; </span><span class="identifier-syntax">NUMBER_CREATED</span><span class="plain-syntax">(</span><span class="identifier-syntax">instance</span><span class="plain-syntax">) + </span><span class="constant-syntax">1</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax">; </span><span class="comment-syntax"> to recover from errors</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">SPATIAL_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">)-&gt;</span><span class="identifier-syntax">incorp_tree_child</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">instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">SPATIAL_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">)-&gt;</span><span class="identifier-syntax">incorp_tree_child</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">I2</span><span class="plain-syntax"> != </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><a href="2-ipw.html#SP3" class="function-link"><span class="function-syntax">Data::Objects::index</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I2</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">depth</span><span class="plain-syntax">+1, </span><span class="identifier-syntax">details</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">I2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">SPATIAL_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">I2</span><span class="plain-syntax">)-&gt;</span><span class="identifier-syntax">incorp_tree_sibling</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">SPATIAL_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">)-&gt;</span><span class="identifier-syntax">object_tree_child</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><a href="2-ipw.html#SP3" class="function-link"><span class="function-syntax">Data::Objects::index</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">SPATIAL_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">)-&gt;</span><span class="identifier-syntax">object_tree_child</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">depth</span><span class="plain-syntax">+1, </span><span class="identifier-syntax">details</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">Spatial::object_is_a_room</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">)) &amp;&amp;</span>
<span class="plain-syntax"> (</span><span class="identifier-syntax">Map::instance_is_a_door</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</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">instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I2</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_INSTANCES</span><span class="plain-syntax">(</span><span class="identifier-syntax">I2</span><span class="plain-syntax">, </span><span class="identifier-syntax">K_object</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">Map::instance_is_a_door</span><span class="plain-syntax">(</span><span class="identifier-syntax">I2</span><span class="plain-syntax">)) &amp;&amp; (</span><span class="identifier-syntax">Spatial::progenitor</span><span class="plain-syntax">(</span><span class="identifier-syntax">I2</span><span class="plain-syntax">) != </span><span class="identifier-syntax">I</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">A</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, *</span><span class="identifier-syntax">B</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">Map::get_door_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">I2</span><span class="plain-syntax">, &amp;</span><span class="identifier-syntax">A</span><span class="plain-syntax">, &amp;</span><span class="identifier-syntax">B</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">A</span><span class="plain-syntax"> == </span><span class="identifier-syntax">I</span><span class="plain-syntax">) </span><a href="2-ipw.html#SP3" class="function-link"><span class="function-syntax">Data::Objects::index</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I2</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">depth</span><span class="plain-syntax">+1, </span><span class="identifier-syntax">details</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">B</span><span class="plain-syntax"> == </span><span class="identifier-syntax">I</span><span class="plain-syntax">) </span><a href="2-ipw.html#SP3" class="function-link"><span class="function-syntax">Data::Objects::index</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I2</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">depth</span><span class="plain-syntax">+1, </span><span class="identifier-syntax">details</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><a href="3-tp.html#SP1" class="function-link"><span class="function-syntax">IXPlayer::index_object_further</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="identifier-syntax">depth</span><span class="plain-syntax">, </span><span class="identifier-syntax">details</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="3-bck.html#SP1" class="function-link"><span class="function-syntax">IXBackdrops::index_object_further</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="identifier-syntax">depth</span><span class="plain-syntax">, </span><span class="identifier-syntax">details</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">SPATIAL_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">)-&gt;</span><span class="identifier-syntax">object_tree_sibling</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><a href="2-ipw.html#SP3" class="function-link"><span class="function-syntax">Data::Objects::index</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">SPATIAL_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">)-&gt;</span><span class="identifier-syntax">object_tree_sibling</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">depth</span><span class="plain-syntax">, </span><span class="identifier-syntax">details</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>And also:
</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">IXSpatial::add_to_World_index</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="identifier-syntax">instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">O</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">O</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">Instances::of_kind</span><span class="plain-syntax">(</span><span class="identifier-syntax">O</span><span class="plain-syntax">, </span><span class="identifier-syntax">K_thing</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">1</span><span class="plain-syntax">, </span><span class="string-syntax">"tight"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Spatial::progenitor</span><span class="plain-syntax">(</span><span class="identifier-syntax">O</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">P</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;initial location:&lt;/i&gt; "</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">rel</span><span class="plain-syntax"> = </span><span class="string-syntax">"in"</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">Instances::of_kind</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">K_supporter</span><span class="plain-syntax">)) </span><span class="identifier-syntax">rel</span><span class="plain-syntax"> = </span><span class="string-syntax">"on"</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">Instances::of_kind</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">K_person</span><span class="plain-syntax">)) </span><span class="identifier-syntax">rel</span><span class="plain-syntax"> = </span><span class="string-syntax">"carried by"</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">SPATIAL_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">O</span><span class="plain-syntax">)-&gt;</span><span class="identifier-syntax">part_flag</span><span class="plain-syntax">) </span><span class="identifier-syntax">rel</span><span class="plain-syntax"> = </span><span class="string-syntax">"part of"</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">inference</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inf</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">POSITIVE_KNOWLEDGE_LOOP</span><span class="plain-syntax">(</span><span class="identifier-syntax">inf</span><span class="plain-syntax">, </span><span class="identifier-syntax">Instances::as_subject</span><span class="plain-syntax">(</span><span class="identifier-syntax">O</span><span class="plain-syntax">), </span><span class="identifier-syntax">property_inf</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">PropertyInferences::get_property</span><span class="plain-syntax">(</span><span class="identifier-syntax">inf</span><span class="plain-syntax">) == </span><span class="identifier-syntax">P_worn</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">rel</span><span class="plain-syntax"> = </span><span class="string-syntax">"worn by"</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">rel</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-ins.html#SP4" class="function-link"><span class="function-syntax">IXInstances::index_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">P</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">at</span><span class="plain-syntax"> = </span><span class="identifier-syntax">SPATIAL_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">O</span><span class="plain-syntax">)-&gt;</span><span class="identifier-syntax">progenitor_set_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">at</span><span class="plain-syntax">) </span><a href="2-ifs.html#SP9" class="function-link"><span class="function-syntax">Index::link</span></a><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">at</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><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
</pre>
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