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<!--Weave of 'Spatial' generated by Inweb-->
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<div class="breadcrumbs">
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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../compiler.html">Inter Modules</a></li><li><a href="index.html">codegen</a></li><li><a href="index.html#6">Chapter 6: Index</a></li><li><b>Spatial</b></li></ul></div>
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<p class="purpose">Indexing functions for the spatial structure of the world model.</p>
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">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/>Map Element - <a href="6-me.html#SP2_1">§2.1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax">) {</span>
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<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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::progenitor</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax">) {</span>
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<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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::is_a_supporter</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::is_a_person</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">I</span><span class="plain-syntax">-></span><span class="element-syntax">is_a_part</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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">I</span><span class="plain-syntax">-></span><span class="element-syntax">is_worn</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>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">rel</span><span class="plain-syntax">) </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"<i>%s</i> "</span><span class="plain-syntax">, </span><span class="identifier-syntax">rel</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. </b>If something is a part, we don't detail it on the World index page, since
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it already turns up under its owner.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">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/>Map Element - <a href="6-me.html#SP1_1">§1.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">I</span><span class="plain-syntax">-></span><span class="identifier-syntax">is_a_part</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>§3. </b>In the World index, we recurse to show the contents and parts:
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">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/>Map Element - <a href="6-me.html#SP2_6">§2.6</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_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>
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<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"> > </span><span class="identifier-syntax">NUMBER_CREATED</span><span class="plain-syntax">(</span><span class="reserved-syntax">faux_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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::incorp_child</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I2</span><span class="plain-syntax"> = </span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::incorp_child</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">I2</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><a href="6-me.html#SP2" class="function-link"><span class="function-syntax">IXPhysicalWorld::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">depth</span><span class="plain-syntax">+1, </span><span class="identifier-syntax">details</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">I2</span><span class="plain-syntax"> = </span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::incorp_sibling</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I2</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::child</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">))</span>
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<span class="plain-syntax"> </span><a href="6-me.html#SP2" class="function-link"><span class="function-syntax">IXPhysicalWorld::index</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::child</span></a><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">+1, </span><span class="identifier-syntax">details</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::is_a_room</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">)) &&</span>
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<span class="plain-syntax"> (</span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::is_a_door</span></a><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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I2</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_OBJECTS</span><span class="plain-syntax">(</span><span class="identifier-syntax">I2</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::is_a_door</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I2</span><span class="plain-syntax">)) && (</span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::progenitor</span></a><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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">faux_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>
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<span class="plain-syntax"> </span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::get_door_data</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I2</span><span class="plain-syntax">, &</span><span class="identifier-syntax">A</span><span class="plain-syntax">, &</span><span class="identifier-syntax">B</span><span class="plain-syntax">);</span>
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<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="6-me.html#SP2" class="function-link"><span class="function-syntax">IXPhysicalWorld::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">depth</span><span class="plain-syntax">+1, </span><span class="identifier-syntax">details</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">B</span><span class="plain-syntax"> == </span><span class="identifier-syntax">I</span><span class="plain-syntax">) </span><a href="6-me.html#SP2" class="function-link"><span class="function-syntax">IXPhysicalWorld::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">depth</span><span class="plain-syntax">+1, </span><span class="identifier-syntax">details</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><a href="6-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>
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<span class="plain-syntax"> </span><a href="6-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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::sibling</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">))</span>
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<span class="plain-syntax"> </span><a href="6-me.html#SP2" class="function-link"><span class="function-syntax">IXPhysicalWorld::index</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::sibling</span></a><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>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>§4. </b>And also:
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">IXSpatial::add_to_World_index</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">IXSpatial::add_to_World_index</span></span>:<br/>Map Element - <a href="6-me.html#SP2_10">§2.10</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">, </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">O</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">O</span><span class="plain-syntax">) && (</span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::is_a_thing</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">O</span><span class="plain-syntax">))) {</span>
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<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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">faux_instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::progenitor</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">O</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"<i>initial location:</i> "</span><span class="plain-syntax">);</span>
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<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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::is_a_supporter</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::is_a_person</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">P</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>
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<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">-></span><span class="element-syntax">is_a_part</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>
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<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">-></span><span class="element-syntax">is_worn</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>
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<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>
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<span class="plain-syntax"> </span><a href="6-ins.html#SP5" class="function-link"><span class="function-syntax">IXInstances::write_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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> = </span><span class="identifier-syntax">O</span><span class="plain-syntax">-></span><span class="element-syntax">progenitor_set_at</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">at</span><span class="plain-syntax">) </span><a href="6-ifs.html#SP14" 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">at</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">HTML_CLOSE</span><span class="plain-syntax">(</span><span class="string-syntax">"p"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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