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<main role="main">
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<!--Weave of 'Property Visibility' 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">Inform7</a></li><li><a href="index.html">if</a></li><li><a href="index.html#5">Chapter 5: Command Parser</a></li><li><b>Property Visibility</b></li></ul></div>
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<p class="purpose">Some properties can be referred to in the player's commands.</p>
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. </b>"Visible" properties can be used to describe an object: for example, if
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colour is a visible property of a car, then an individual instance of <span class="extract"><span class="extract-syntax">K_car</span></span>
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can be referred to by the player as GREEN CAR if and only if that instance has
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the colour value "green".
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</p>
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<p class="commentary">Properly speaking it is not the property itself which is visible, but the
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combination of property and its owner. So we record visibility by attaching
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the following blob of data to a <span class="extract"><span class="extract-syntax">property_permission</span></span>:
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</p>
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<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="constant-syntax">NO_VISIBILITY_LEVEL</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span>
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<span class="definition-keyword">define</span> <span class="constant-syntax">REFERRING_TO_VISIBILITY_LEVEL</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span>
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<span class="definition-keyword">define</span> <span class="constant-syntax">DESCRIBING_VISIBILITY_LEVEL</span><span class="plain-syntax"> </span><span class="constant-syntax">2</span>
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</pre>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">typedef</span><span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">parsing_pp_data</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">visibility_level_in_parser</span><span class="plain-syntax">; </span><span class="comment-syntax"> one of the </span><span class="extract"><span class="extract-syntax">*_VISIBILITY_LEVEL</span></span><span class="comment-syntax"> values above</span>
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<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">visibility_condition</span><span class="plain-syntax">; </span><span class="comment-syntax"> (at least if...?)</span>
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<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">visibility_sentence</span><span class="plain-syntax">; </span><span class="comment-syntax"> where this is specified</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">CLASS_DEFINITION</span>
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<span class="plain-syntax">} </span><span class="reserved-syntax">parsing_pp_data</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">parsing_pp_data</span><span class="plain-syntax"> *</span><span class="function-syntax">Visibility::new_pp_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">property_permission</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pp</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">parsing_pp_data</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pd</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CREATE</span><span class="plain-syntax">(</span><span class="reserved-syntax">parsing_pp_data</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">pd</span><span class="plain-syntax">-></span><span class="element-syntax">visibility_level_in_parser</span><span class="plain-syntax"> = </span><span class="constant-syntax">NO_VISIBILITY_LEVEL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">pd</span><span class="plain-syntax">-></span><span class="element-syntax">visibility_condition</span><span class="plain-syntax"> = </span><span class="identifier-syntax">EMPTY_WORDING</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">pd</span><span class="plain-syntax">-></span><span class="element-syntax">visibility_sentence</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">pd</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Visibility::new_permission_notify</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">Visibility::new_permission_notify</span></span>:<br/>Parsing Plugin - <a href="5-pp.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">property_permission</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_pp</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">CREATE_PLUGIN_PP_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">parsing</span><span class="plain-syntax">, </span><span class="identifier-syntax">new_pp</span><span class="plain-syntax">, </span><a href="5-pv.html#SP1" class="function-link"><span class="function-syntax">Visibility::new_pp_data</span></a><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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<ul class="endnotetexts"><li>The structure parsing_pp_data is private to this section.</li></ul>
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<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. </b>The following function sets the visibility level and condition for a given
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property and owner, returning <span class="extract"><span class="extract-syntax">FALSE</span></span> if the owner cannot in fact have that
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property. There's a little dance here because perhaps we want to set visibility
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for "open" when its negation "closed" has the permission, or vice versa.
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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">Visibility::set</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">Visibility::set</span></span>:<br/>Understand Sentences - <a href="5-us.html#SP16">§16</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pr</span><span class="plain-syntax">, </span><span class="identifier-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="identifier-syntax">subj</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">level</span><span class="plain-syntax">, </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">WHENW</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">upto</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</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">Properties::is_either_or</span><span class="plain-syntax">(</span><span class="identifier-syntax">pr</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) </span><span class="identifier-syntax">upto</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">parity</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">parity</span><span class="plain-syntax"> <= </span><span class="identifier-syntax">upto</span><span class="plain-syntax">; </span><span class="identifier-syntax">parity</span><span class="plain-syntax">++) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">seek_prn</span><span class="plain-syntax"> = (</span><span class="identifier-syntax">parity</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">)?</span><span class="identifier-syntax">pr:</span><span class="plain-syntax">(</span><span class="identifier-syntax">EitherOrProperties::get_negation</span><span class="plain-syntax">(</span><span class="identifier-syntax">pr</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">seek_prn</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">PropertyPermissions::find</span><span class="plain-syntax">(</span><span class="identifier-syntax">subj</span><span class="plain-syntax">, </span><span class="identifier-syntax">seek_prn</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="identifier-syntax">property_permission</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pp</span><span class="plain-syntax"> = </span><span class="identifier-syntax">PropertyPermissions::grant</span><span class="plain-syntax">(</span><span class="identifier-syntax">subj</span><span class="plain-syntax">, </span><span class="identifier-syntax">seek_prn</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="identifier-syntax">PP_PLUGIN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">parsing</span><span class="plain-syntax">, </span><span class="identifier-syntax">pp</span><span class="plain-syntax">)-></span><span class="element-syntax">visibility_level_in_parser</span><span class="plain-syntax"> = </span><span class="identifier-syntax">level</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">PP_PLUGIN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">parsing</span><span class="plain-syntax">, </span><span class="identifier-syntax">pp</span><span class="plain-syntax">)-></span><span class="element-syntax">visibility_condition</span><span class="plain-syntax"> = </span><span class="identifier-syntax">WHENW</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">PP_PLUGIN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">parsing</span><span class="plain-syntax">, </span><span class="identifier-syntax">pp</span><span class="plain-syntax">)-></span><span class="element-syntax">visibility_sentence</span><span class="plain-syntax"> = </span><span class="identifier-syntax">current_sentence</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
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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">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>Does the property owner <span class="extract"><span class="extract-syntax">subj</span></span> have any visible properties?
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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">Visibility::any_property_visible_to_subject</span><span class="plain-syntax">(</span><span class="identifier-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="identifier-syntax">subj</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">allow_inheritance</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pr</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER</span><span class="plain-syntax">(</span><span class="identifier-syntax">pr</span><span class="plain-syntax">, </span><span class="identifier-syntax">property</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">property_permission</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pp</span><span class="plain-syntax"> = </span><span class="identifier-syntax">PropertyPermissions::find</span><span class="plain-syntax">(</span><span class="identifier-syntax">subj</span><span class="plain-syntax">, </span><span class="identifier-syntax">pr</span><span class="plain-syntax">, </span><span class="identifier-syntax">allow_inheritance</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">pp</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">PP_PLUGIN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">parsing</span><span class="plain-syntax">, </span><span class="identifier-syntax">pp</span><span class="plain-syntax">)-></span><span class="element-syntax">visibility_level_in_parser</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>§4. </b>For what these levels actually mean, see the code for the run-time command parser
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at <a href="../CommandParserKit/S-prs.html" class="internal">Parser (in CommandParserKit)</a>.
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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">Visibility::get_level</span><span class="plain-syntax">(</span><span class="identifier-syntax">property_permission</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pp</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">PP_PLUGIN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">parsing</span><span class="plain-syntax">, </span><span class="identifier-syntax">pp</span><span class="plain-syntax">)-></span><span class="element-syntax">visibility_level_in_parser</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="SP5" class="paragraph-anchor"></a><b>§5. </b>The condition text, if supplied, says that the property is only visible
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if some condition holds.
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</p>
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<p class="commentary">For timing reasons, we don't parse this when it is first declared, but only
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when we need it, which is now:
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="function-syntax">Visibility::get_condition</span><span class="plain-syntax">(</span><span class="identifier-syntax">property_permission</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pp</span><span class="plain-syntax">) {</span>
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<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="identifier-syntax">PP_PLUGIN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">parsing</span><span class="plain-syntax">, </span><span class="identifier-syntax">pp</span><span class="plain-syntax">)-></span><span class="element-syntax">visibility_condition</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">Wordings::empty</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">spec</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="function-syntax"><s-condition></span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">)) </span><span class="identifier-syntax">spec</span><span class="plain-syntax"> = </span><span class="function-syntax"><<rp>></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">spec</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Specifications::new_UNKNOWN</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</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">Dash::validate_conditional_clause</span><span class="plain-syntax">(</span><span class="identifier-syntax">spec</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="identifier-syntax">current_sentence</span><span class="plain-syntax"> = </span><span class="identifier-syntax">PP_PLUGIN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">parsing</span><span class="plain-syntax">, </span><span class="identifier-syntax">pp</span><span class="plain-syntax">)-></span><span class="element-syntax">visibility_sentence</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::sentence_problem</span><span class="plain-syntax">(</span><span class="identifier-syntax">Task::syntax_tree</span><span class="plain-syntax">(), </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_BadVisibilityWhen</span><span class="plain-syntax">),</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"the condition after 'when' makes no sense to me"</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"although otherwise this worked - it is only the part after 'when' "</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"which I can't follow."</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">PP_PLUGIN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">parsing</span><span class="plain-syntax">, </span><span class="identifier-syntax">pp</span><span class="plain-syntax">)-></span><span class="element-syntax">visibility_condition</span><span class="plain-syntax"> = </span><span class="identifier-syntax">EMPTY_WORDING</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">NULL</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">spec</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="SP6" class="paragraph-anchor"></a><b>§6. </b>Though currently unused, this function may be useful for debugging:
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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">Visibility::log_parsing_visibility</span><span class="plain-syntax">(</span><span class="identifier-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="identifier-syntax">infs</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"Permissions for $j:\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">infs</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">property_permission</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pp</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_PERMISSIONS_FOR_INFS</span><span class="plain-syntax">(</span><span class="identifier-syntax">pp</span><span class="plain-syntax">, </span><span class="identifier-syntax">infs</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"$Y: visibility %d, condition %W\n"</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">PropertyPermissions::get_property</span><span class="plain-syntax">(</span><span class="identifier-syntax">pp</span><span class="plain-syntax">),</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">PP_PLUGIN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">parsing</span><span class="plain-syntax">, </span><span class="identifier-syntax">pp</span><span class="plain-syntax">)-></span><span class="element-syntax">visibility_level_in_parser</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">PP_PLUGIN_DATA</span><span class="plain-syntax">(</span><span class="identifier-syntax">parsing</span><span class="plain-syntax">, </span><span class="identifier-syntax">pp</span><span class="plain-syntax">)-></span><span class="element-syntax">visibility_condition</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">InferenceSubjects::narrowest_broader_subject</span><span class="plain-syntax">(</span><span class="identifier-syntax">infs</span><span class="plain-syntax">))</span>
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<span class="plain-syntax"> </span><a href="5-pv.html#SP6" class="function-link"><span class="function-syntax">Visibility::log_parsing_visibility</span></a><span class="plain-syntax">(</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">InferenceSubjects::narrowest_broader_subject</span><span class="plain-syntax">(</span><span class="identifier-syntax">infs</span><span class="plain-syntax">));</span>
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<span class="plain-syntax">}</span>
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</pre>
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