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<!--Weave of 'Condition Properties' 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 Modules</a></li><li><a href="index.html">core</a></li><li><a href="index.html#15">Chapter 15: Properties</a></li><li><b>Condition Properties</b></li></ul></div>
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<p class="purpose">Properties which hold one of an enumerated set of named states of something.</p>
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<ul class="toc"><li><a href="15-cp.html#SP5">§5. Coincidence</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. </b>Some valued properties are "conditions", in the sense of "What
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condition is this in?": for instance the sentence
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</p>
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<blockquote>
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<p>The cask can be wedged open, bolted closed or stoved in.</p>
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</blockquote>
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<p class="commentary">sets up a new property called the "cask condition", whose value must be one of
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these three named possibilities. (A new kind of value is set up whose three
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possible values these are.)
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</p>
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<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. </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">Properties::Conditions::initialise</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">Properties::Conditions::initialise</span></span>:<br/>Valued Properties - <a href="15-vp.html#SP4">§4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-></span><span class="element-syntax">condition_of</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">prn</span><span class="plain-syntax">-></span><span class="element-syntax">condition_anonymously_named</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></p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="function-syntax">Properties::Conditions::new</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">Properties::Conditions::new</span></span>:<br/>New Property Requests - <a href="4-npr.html#SP5_9">§5.9</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="identifier-syntax">infs</span><span class="plain-syntax">, </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">NW</span><span class="plain-syntax">, </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">set</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">already</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">anon</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">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">W</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NW</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> *</span><span class="identifier-syntax">already</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Wordings::empty</span><span class="plain-syntax">(</span><span class="identifier-syntax">NW</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">common_kind</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">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">mixed_kind</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">some_new</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">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">CKW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">EMPTY_WORDING</span><span class="plain-syntax">, </span><span class="identifier-syntax">NKW</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">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">option</span><span class="plain-syntax"> = </span><span class="identifier-syntax">set</span><span class="plain-syntax">; </span><span class="identifier-syntax">option</span><span class="plain-syntax">; </span><span class="identifier-syntax">option</span><span class="plain-syntax"> = (</span><span class="identifier-syntax">option</span><span class="plain-syntax">-></span><span class="element-syntax">down</span><span class="plain-syntax">)?(</span><span class="identifier-syntax">option</span><span class="plain-syntax">-></span><span class="element-syntax">down</span><span class="plain-syntax">-></span><span class="element-syntax">next</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">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">PW</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Node::get_type</span><span class="plain-syntax">(</span><span class="identifier-syntax">option</span><span class="plain-syntax">) == </span><span class="identifier-syntax">AND_NT</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">PW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">option</span><span class="plain-syntax">-></span><span class="element-syntax">down</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">else</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">PW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">option</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">adjective</span><span class="plain-syntax"> *</span><span class="identifier-syntax">adj</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Adjectives::parse</span><span class="plain-syntax">(</span><span class="identifier-syntax">PW</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">adj</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax"> = </span><a href="7-am.html#SP13" class="function-link"><span class="function-syntax">Adjectives::Meanings::has_ENUMERATIVE_meaning</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">adj</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax"> = (</span><span class="identifier-syntax">I</span><span class="plain-syntax">)?</span><a href="6-ins.html#SP17" class="function-link"><span class="function-syntax">Instances::to_kind</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</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="identifier-syntax">common_kind</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">common_kind</span><span class="plain-syntax"> = </span><span class="identifier-syntax">K</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">CKW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">PW</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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Kinds::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">common_kind</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">mixed_kind</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">NKW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">PW</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">else</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">some_new</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">; </span><span class="identifier-syntax">NKW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">PW</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><span class="identifier-syntax">common_kind</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</span><span class="plain-syntax"> = </span><a href="15-cp.html#SP5" class="function-link"><span class="function-syntax">Properties::Conditions::get_coinciding_property</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">common_kind</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::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">NKW</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_source</span><span class="plain-syntax">(1, </span><span class="identifier-syntax">current_sentence</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-sq.html#SP3" class="function-link"><span class="function-syntax">Problems::quote_kind</span></a><span class="plain-syntax">(2, </span><span class="identifier-syntax">common_kind</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_wording</span><span class="plain-syntax">(3, </span><span class="identifier-syntax">CKW</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_wording</span><span class="plain-syntax">(4, </span><span class="identifier-syntax">NKW</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::handmade_problem</span><span class="plain-syntax">(</span><a href="1-wtc.html#SP6" class="function-link"><span class="function-syntax">Task::syntax_tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_MixedExistingConstants</span><span class="plain-syntax">));</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_segment</span><span class="plain-syntax">(</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"In %1, one of the values you supply as a possibility is '%3', "</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"but this already has a meaning (as %2). This might be okay if "</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"every other possibility was also %2, but '%4' isn't."</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_end</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="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">prn</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">Problems::quote_source</span><span class="plain-syntax">(1, </span><span class="identifier-syntax">current_sentence</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-sq.html#SP3" class="function-link"><span class="function-syntax">Problems::quote_kind</span></a><span class="plain-syntax">(2, </span><span class="identifier-syntax">common_kind</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::handmade_problem</span><span class="plain-syntax">(</span><a href="1-wtc.html#SP6" class="function-link"><span class="function-syntax">Task::syntax_tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">BelievedImpossible</span><span class="plain-syntax">)); </span><span class="comment-syntax"> because it won't parse</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_segment</span><span class="plain-syntax">(</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"In %1, every value you supply as a possibility is %2. "</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"That would be okay if it were a property which is a condition "</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"of something, but it isn't."</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_end</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>
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<span class="plain-syntax"> *</span><span class="identifier-syntax">already</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">prn</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="named-paragraph-container code-font"><a href="15-cp.html#SP3_1" class="named-paragraph-link"><span class="named-paragraph">Devise a name to give to this currently nameless condition</span><span class="named-paragraph-number">3.1</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">anon</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="identifier-syntax">pcalc_prop</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop</span><span class="plain-syntax"> = </span><a href="11-tc.html#SP1" class="function-link"><span class="function-syntax">Calculus::Propositions::Abstract::to_create_something</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">NULL</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="identifier-syntax">prop</span><span class="plain-syntax"> = </span><a href="11-pr.html#SP14" class="function-link"><span class="function-syntax">Calculus::Propositions::concatenate</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><a href="11-tc.html#SP1" class="function-link"><span class="function-syntax">Calculus::Propositions::Abstract::to_make_a_kind</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">K_value</span><span class="plain-syntax">));</span>
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<span class="plain-syntax"> </span><a href="12-ap.html#SP4" class="function-link"><span class="function-syntax">Calculus::Propositions::Assert::assert_true</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop</span><span class="plain-syntax">, </span><span class="identifier-syntax">prevailing_mood</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</span><span class="plain-syntax"> = </span><a href="15-vp.html#SP1" class="function-link"><span class="function-syntax">Properties::Valued::obtain</span></a><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="identifier-syntax">prn</span><span class="plain-syntax">-></span><span class="element-syntax">either_or</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">prn</span><span class="plain-syntax">-></span><span class="element-syntax">condition_of</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">prn</span><span class="plain-syntax">-></span><span class="element-syntax">condition_anonymously_named</span><span class="plain-syntax"> = </span><span class="identifier-syntax">anon</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">prn</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_1" class="paragraph-anchor"></a><b>§3.1. </b>The name is ideally the subject's name plus "condition": for instance,
|
|
"lounge table condition". But we need to be careful in case there are
|
|
multiple such conditions, because we don't want to duplicate the name. So
|
|
we begin by counting how many such already exist, and then append a number:
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thus "lounge table condition", then "lounge table condition 2", and so on.
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</p>
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<p class="commentary">We could be more fanatical about this, if we wanted. The code here doesn't
|
|
guarantee uniqueness of the resulting name in all cases, because it's possible
|
|
for two subjects to have identical names. (But when that happens, it's unlikely
|
|
that different condition properties are given to them.) We won't obsess over
|
|
this because the point is only to help the user by minimising namespace
|
|
clashes; it isn't essential to Inform's running.
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</p>
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<p class="commentary">(And at present it seems very unlikely that conditions would ever be applied to
|
|
nameless subjects.)
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</p>
|
|
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Devise a name to give to this currently nameless condition</span><span class="named-paragraph-number">3.1</span></span><span class="comment-syntax"> =</span>
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</p>
|
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<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">ct</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">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</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">prn</span><span class="plain-syntax">, </span><span class="reserved-syntax">property</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">prn</span><span class="plain-syntax">-></span><span class="element-syntax">condition_of</span><span class="plain-syntax"> == </span><span class="identifier-syntax">infs</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">prn</span><span class="plain-syntax">-></span><span class="element-syntax">condition_anonymously_named</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">ct</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">feed_t</span><span class="plain-syntax"> </span><span class="identifier-syntax">id</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Feeds::begin</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">W2</span><span class="plain-syntax"> = </span><a href="16-is.html#SP23" class="function-link"><span class="function-syntax">InferenceSubjects::get_name_text</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">infs</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">W2</span><span class="plain-syntax">)) </span><span class="identifier-syntax">Feeds::feed_wording</span><span class="plain-syntax">(</span><span class="identifier-syntax">W2</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">Feeds::feed_C_string</span><span class="plain-syntax">(</span><span class="identifier-syntax">L</span><span class="string-syntax">" nameless "</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Feeds::feed_C_string</span><span class="plain-syntax">(</span><span class="identifier-syntax">L</span><span class="string-syntax">" condition "</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">ct</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">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">numb</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">numb</span><span class="plain-syntax">, </span><span class="string-syntax">" %d "</span><span class="plain-syntax">, </span><span class="identifier-syntax">ct</span><span class="plain-syntax">+1);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Feeds::feed_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">numb</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">numb</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">W</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Feeds::end</span><span class="plain-syntax">(</span><span class="identifier-syntax">id</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="15-cp.html#SP3">§3</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>§4. </b></p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="function-syntax">Properties::Conditions::of_what</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">Properties::Conditions::of_what</span></span>:<br/>Instances - <a href="6-ins.html#SP5_3">§5.3</a>, <a href="6-ins.html#SP36">§36</a><br/>Lvalues - <a href="14-lv.html#SP13_3_1">§13.3.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prn</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">prn</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">prn</span><span class="plain-syntax">-></span><span class="element-syntax">either_or</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>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">prn</span><span class="plain-syntax">-></span><span class="element-syntax">condition_of</span><span class="plain-syntax">; </span><span class="comment-syntax"> which will be null if not a condition property</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP5" class="paragraph-anchor"></a><b>§5. Coincidence. </b>Coincidence of kinds and properties occurs where a kind has the same name
|
|
exactly as a property, allowing the same name to be used grammatically in
|
|
two different contexts. We say that the kind and the property "coincide".
|
|
In particular, this happens with conditions:
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>Brightness is a kind of value. The brightnesses are guttering, weak, radiant and blazing. The lantern has a brightness. The lantern is blazing.</p>
|
|
</blockquote>
|
|
|
|
<p class="commentary">Here "brightness" becomes the name of a new kind, but "brightness" also
|
|
becomes the name of a property.
|
|
</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">Properties::Conditions::name_can_coincide_with_property</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">Properties::Conditions::name_can_coincide_with_property</span></span>:<br/>The Equality Relation - <a href="12-ter.html#SP4">§4</a>, <a href="12-ter.html#SP7">§7</a><br/>Valued Properties - <a href="15-vp.html#SP6">§6</a><br/>Comparative Relations - <a href="15-cr.html#SP6_1">§6.1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</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">K</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">-></span><span class="element-syntax">construct</span><span class="plain-syntax">-></span><span class="identifier-syntax">can_coincide_with_property</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="function-syntax">Properties::Conditions::get_coinciding_property</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">Properties::Conditions::get_coinciding_property</span></span>:<br/><a href="15-cp.html#SP3">§3</a><br/>Assertions - <a href="5-ass.html#SP6_3_41">§6.3.41</a>, <a href="5-ass.html#SP6_3_41_5">§6.3.41.5</a><br/>Instances - <a href="6-ins.html#SP5">§5</a>, <a href="6-ins.html#SP9">§9</a>, <a href="6-ins.html#SP35">§35</a>, <a href="6-ins.html#SP36">§36</a><br/>Propositions - <a href="11-pr.html#SP26">§26</a>, <a href="11-pr.html#SP34_1">§34.1</a><br/>The Equality Relation - <a href="12-ter.html#SP4_1">§4.1</a>, <a href="12-ter.html#SP7">§7</a>, <a href="12-ter.html#SP7_1">§7.1</a><br/>Dash - <a href="14-ds2.html#SP10_9_1_1_5_1_1">§10.9.1.1.5.1.1</a>, <a href="14-ds2.html#SP10_9_1_1_5_1_2">§10.9.1.1.5.1.2</a><br/>Comparative Relations - <a href="15-cr.html#SP4">§4</a>, <a href="15-cr.html#SP6_1">§6.1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</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">K</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">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">K</span><span class="plain-syntax">-></span><span class="element-syntax">construct</span><span class="plain-syntax">-></span><span class="identifier-syntax">coinciding_property</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">Properties::Conditions::set_coinciding_property</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">Properties::Conditions::set_coinciding_property</span></span>:<br/>Instances - <a href="6-ins.html#SP8">§8</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</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">K</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="plain-syntax"> </span><span class="identifier-syntax">K</span><span class="plain-syntax">-></span><span class="element-syntax">construct</span><span class="plain-syntax">-></span><span class="identifier-syntax">coinciding_property</span><span class="plain-syntax"> = </span><span class="identifier-syntax">P</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
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