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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../inform7n.html">Inform7</a></li><li><a href="index.html">knowledge</a></li><li><a href="index.html#3">Chapter 3: Properties</a></li><li><b>Measurements</b></li></ul></div>
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<p class="purpose">To define adjectives such as large, wide or roomy, which make implicit comparisons of the size of some numerical property, and which lead to comparative and superlative forms.</p>
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<ul class="toc"><li><a href="3-msr.html#SP1">§1. Measurements, regions and shapes</a></li><li><a href="3-msr.html#SP4">§4. Creation</a></li><li><a href="3-msr.html#SP11">§11. Comparative forms</a></li><li><a href="3-msr.html#SP12">§12. Late registration of prepositions comparing properties</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. Measurements, regions and shapes. </b>A typical example would be:
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</p>
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<blockquote>
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<p>Definition: A container is roomy if its carrying capacity is 10 or more.</p>
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</blockquote>
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<p class="commentary">Here the domain of the definition is "container", and we must assign an adjective
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meaning for "roomy" which involves the comparison of a property (here "carrying
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capacity") against a threshold value \(t\) (here, \(t=10\)). "roomy" is said to
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be the headword; the comparative form would be roomier, and the superlative
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form roomiest. The comparative will make a relation — see <a href="3-cr.html" class="internal">Comparative Relations</a> —
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while and the must be a phrase. It can't be an adjective, since its domain
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would be too ambiguous in text such as:
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</p>
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<blockquote>
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<p>if the canvas bag is roomiest, ...</p>
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</blockquote>
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<p class="commentary">which begs the question: roomiest out of what? All containers, or implicitly
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some subcollection of them? So we avoid the problem by allowing superlatives
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only when explicitly followed by a domain:
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</p>
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<blockquote>
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<p>roomiest container in Heathrow Terminal 5</p>
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</blockquote>
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<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. </b>Each such definition allows the property value to belong to a "region", which
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takes one of these three "shapes":
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</p>
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<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="constant-syntax">MEASURE_T_OR_LESS</span><span class="plain-syntax"> -1</span>
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<span class="definition-keyword">define</span> <span class="constant-syntax">MEASURE_T_EXACTLY</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">MEASURE_T_OR_MORE</span><span class="plain-syntax"> </span><span class="constant-syntax">1</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>§3. </b>Here are operators for checking whether we lie inside the domain, where
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the LHS is the value being tested and the RHS is the constant \(t\). In weak
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comparison, \(t\) itself is a member; in strict comparison, it isn't.
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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">binary_predicate</span><span class="plain-syntax"> *</span><span class="function-syntax">Measurements::weak_comparison_bp</span><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">shape</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">binary_predicate</span><span class="plain-syntax"> *</span><span class="identifier-syntax">operator</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="comment-syntax"> solely to placate gcc</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax"> (</span><span class="identifier-syntax">shape</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">MEASURE_T_OR_MORE:</span><span class="plain-syntax"> </span><span class="identifier-syntax">operator</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R_numerically_greater_than_or_equal_to</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">MEASURE_T_EXACTLY:</span><span class="plain-syntax"> </span><span class="identifier-syntax">operator</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R_equality</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">MEASURE_T_OR_LESS:</span><span class="plain-syntax"> </span><span class="identifier-syntax">operator</span><span class="plain-syntax"> = </span><span class="identifier-syntax">R_numerically_less_than_or_equal_to</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">default:</span><span class="plain-syntax"> </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"unknown region for weak comparison"</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">operator</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">char</span><span class="plain-syntax"> *</span><span class="function-syntax">Measurements::strict_comparison</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">Measurements::strict_comparison</span></span>:<br/><a href="3-msr.html#SP11_1">§11.1</a><br/>Measurement Adjectives - <a href="3-ma.html#SP3_3_2">§3.3.2</a><br/>Comparative Relations - <a href="3-cr.html#SP6_1">§6.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">shape</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">operator</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="comment-syntax"> solely to placate clang</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax"> (</span><span class="identifier-syntax">shape</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">MEASURE_T_OR_MORE:</span><span class="plain-syntax"> </span><span class="identifier-syntax">operator</span><span class="plain-syntax"> = </span><span class="string-syntax">">"</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">MEASURE_T_OR_LESS:</span><span class="plain-syntax"> </span><span class="identifier-syntax">operator</span><span class="plain-syntax"> = </span><span class="string-syntax">"<"</span><span class="plain-syntax">; </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">default:</span><span class="plain-syntax"> </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"unknown region for strict comparison"</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">operator</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. Creation. </b>The implementation of measurement adjectives is tricksy for reasons of
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timing during Inform's run: the names of kinds, properties and values become
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available at different times; whereas we need the name of the adjective
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itself to become available very early on. This is why the structure below
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appears to record a lot of extraneous clutter apparently needed only
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temporarily during parsing — because parsing does not happen all at once,
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and partial results have to be parked in the structure after one stage to
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be picked up at the next.
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</p>
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<p class="commentary">At any rate, here goes:
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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">typedef</span><span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">measurement_definition</span><span class="plain-syntax"> {</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">measurement_node</span><span class="plain-syntax">; </span><span class="comment-syntax"> where the actual definition is</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">headword</span><span class="plain-syntax">; </span><span class="comment-syntax"> adjective being defined (must be single word)</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">adjective_meaning</span><span class="plain-syntax"> *</span><span class="identifier-syntax">headword_as_adjective</span><span class="plain-syntax">; </span><span class="comment-syntax"> which adjective meaning</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">superlative</span><span class="plain-syntax">; </span><span class="comment-syntax"> its superlative form</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">property</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop</span><span class="plain-syntax">; </span><span class="comment-syntax"> the property being compared, if any</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">name_of_property_to_compare</span><span class="plain-syntax">; </span><span class="comment-syntax"> and its name</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">region_shape</span><span class="plain-syntax">; </span><span class="comment-syntax"> one of the </span><span class="extract"><span class="extract-syntax">MEASURE_T_*</span></span><span class="comment-syntax"> constants</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">region_threshold</span><span class="plain-syntax">; </span><span class="comment-syntax"> numerical value of threshold (if any)</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">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">region_kind</span><span class="plain-syntax">; </span><span class="comment-syntax"> of this value</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">region_threshold_evaluated</span><span class="plain-syntax">; </span><span class="comment-syntax"> have we evaluated this one yet?</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">region_threshold_text</span><span class="plain-syntax">; </span><span class="comment-syntax"> text of threshold value</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">measurement_compilation_data</span><span class="plain-syntax"> </span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">;</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">measurement_definition</span><span class="plain-syntax">;</span>
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</pre>
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<ul class="endnotetexts"><li>The structure measurement_definition is accessed in 2/ins, 2/nv, 3/prp, 3/ma, 4/pp and here.</li></ul>
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<p class="commentary firstcommentary"><a id="SP5" class="paragraph-anchor"></a><b>§5. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">measurement_definition</span><span class="plain-syntax"> *</span><span class="function-syntax">Measurements::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">Measurements::new</span></span>:<br/>Measurement Adjectives - <a href="3-ma.html#SP3">§3</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">q</span><span class="plain-syntax">, </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">AW</span><span class="plain-syntax">, </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">THRESW</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">prop</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">shape</span><span class="plain-syntax">, </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">PRW</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">measurement_definition</span><span class="plain-syntax"> *</span><span class="identifier-syntax">mdef</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CREATE</span><span class="plain-syntax">(</span><span class="reserved-syntax">measurement_definition</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="identifier-syntax">measurement_node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">q</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="identifier-syntax">headword</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Wordings::first_word</span><span class="plain-syntax">(</span><span class="identifier-syntax">AW</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="identifier-syntax">region_threshold</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="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="identifier-syntax">region_threshold_text</span><span class="plain-syntax"> = </span><span class="identifier-syntax">THRESW</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="identifier-syntax">region_threshold_evaluated</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">mdef</span><span class="plain-syntax">-></span><span class="identifier-syntax">prop</span><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><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="identifier-syntax">region_shape</span><span class="plain-syntax"> = </span><span class="identifier-syntax">shape</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="identifier-syntax">name_of_property_to_compare</span><span class="plain-syntax"> = </span><span class="identifier-syntax">PRW</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="identifier-syntax">superlative</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">mdef</span><span class="plain-syntax">-></span><span class="identifier-syntax">headword_as_adjective</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">mdef</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax"> = </span><span class="identifier-syntax">RTAdjectives::new_measurement_compilation_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">mdef</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">mdef</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>The following converts an mdef to a property and shape:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Measurements::read_property_details</span><span class="plain-syntax">(</span><span class="reserved-syntax">measurement_definition</span><span class="plain-syntax"> *</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">,</span>
|
|
<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="reserved-syntax">int</span><span class="plain-syntax"> *</span><span class="identifier-syntax">shape</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">prn</span><span class="plain-syntax"> = </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">prop</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">shape</span><span class="plain-syntax">) *</span><span class="identifier-syntax">shape</span><span class="plain-syntax"> = </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_shape</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP7" class="paragraph-anchor"></a><b>§7. </b>And this does the inverse, albeit a little slowly:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">measurement_definition</span><span class="plain-syntax"> *</span><span class="function-syntax">Measurements::retrieve</span><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="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">shape</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">measurement_definition</span><span class="plain-syntax"> *</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER</span><span class="plain-syntax">(</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">, </span><span class="reserved-syntax">measurement_definition</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="3-msr.html#SP9" class="function-link"><span class="function-syntax">Measurements::validate</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><a href="3-msr.html#SP10" class="function-link"><span class="function-syntax">Measurements::is_valid</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">)) && (</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">prop</span><span class="plain-syntax"> == </span><span class="identifier-syntax">prn</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_shape</span><span class="plain-syntax"> == </span><span class="identifier-syntax">shape</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">mdef</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8" class="paragraph-anchor"></a><b>§8. </b>As noted above, there are timing issues here, and the initial state of a
|
|
<a href="3-msr.html#SP4" class="internal">measurement_definition</a> leaves much to be filled in later. This is called
|
|
"validation", and is to some extent performed on demand. The following tries
|
|
to validate everything:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Measurements::validate_definitions</span><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">measurement_definition</span><span class="plain-syntax"> *</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER</span><span class="plain-syntax">(</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">, </span><span class="reserved-syntax">measurement_definition</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="3-msr.html#SP9" class="function-link"><span class="function-syntax">Measurements::validate</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP9" class="paragraph-anchor"></a><b>§9. </b>But we can also try to validate just one at a time:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Measurements::validate</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">Measurements::validate</span></span>:<br/><a href="3-msr.html#SP7">§7</a>, <a href="3-msr.html#SP8">§8</a>, <a href="3-msr.html#SP11">§11</a><br/>Measurement Adjectives - <a href="3-ma.html#SP4">§4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">measurement_definition</span><span class="plain-syntax"> *</span><span class="identifier-syntax">mdef</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">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">prop</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">Wordings::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">name_of_property_to_compare</span><span class="plain-syntax">)))</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="3-msr.html#SP9_1" class="named-paragraph-link"><span class="named-paragraph">Fill in the missing property name, P</span><span class="named-paragraph-number">9.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_threshold_evaluated</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="3-msr.html#SP9_2" class="named-paragraph-link"><span class="named-paragraph">Fill in the missing threshold value, t</span><span class="named-paragraph-number">9.2</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP9_1" class="paragraph-anchor"></a><b>§9.1. </b>Here we either make \(P\) valid, or leave it <span class="extract"><span class="extract-syntax">NULL</span></span> and issue a problem.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Fill in the missing property name, P</span><span class="named-paragraph-number">9.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="function-syntax"><property-name>(mdef-></span><span class="element-syntax">name_of_property_to_compare</span><span class="plain-syntax">)) </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">prop</span><span class="plain-syntax"> = </span><span class="function-syntax"><<rp>></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">prop</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"Validating mdef with headword %W... <%W>\n"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">headword</span><span class="plain-syntax">, </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">name_of_property_to_compare</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::definition_problem</span><span class="plain-syntax">(</span><span class="identifier-syntax">Task::syntax_tree</span><span class="plain-syntax">(),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_GradingUnknownProperty</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">measurement_node</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"that definition involves an unknown property"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"assuming it was meant to be a definition in the form 'Definition: "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"a container is large if its carrying capacity is 10 or more.'"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="3-msr.html#SP9">§9</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP9_2" class="paragraph-anchor"></a><b>§9.2. </b>Here we either make \(t\) valid, or leave <span class="extract"><span class="extract-syntax">mdef->region_threshold_evaluated</span></span> clear
|
|
and issue a problem.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Fill in the missing threshold value, t</span><span class="named-paragraph-number">9.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="identifier-syntax">region_kind</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">if</span><span class="plain-syntax"> (</span><span class="function-syntax"><s-literal>(mdef-></span><span class="element-syntax">region_threshold_text</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_kind</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Rvalues::to_kind</span><span class="plain-syntax">(</span><span class="function-syntax"><<rp>></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">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_kind</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_threshold</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Rvalues::to_encoded_notation</span><span class="plain-syntax">(</span><span class="function-syntax"><<rp>></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">Kinds::Behaviour::is_quasinumerical</span><span class="plain-syntax">(</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_kind</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_shape</span><span class="plain-syntax"> != </span><span class="constant-syntax">MEASURE_T_EXACTLY</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::definition_problem</span><span class="plain-syntax">(</span><span class="identifier-syntax">Task::syntax_tree</span><span class="plain-syntax">(),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_GradingNonarithmeticKOV</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">measurement_node</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"the property value given here has a kind which can't be "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"subject to numerical comparisons"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"so it doesn't make sense to talk about it being 'more' or "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"'less'."</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_threshold</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Kinds::compatible</span><span class="plain-syntax">(</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_kind</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><a href="3-vp.html#SP6" class="function-link"><span class="function-syntax">ValueProperties::kind</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">prop</span><span class="plain-syntax">)) != </span><span class="identifier-syntax">ALWAYS_MATCH</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::definition_problem</span><span class="plain-syntax">(</span><span class="identifier-syntax">Task::syntax_tree</span><span class="plain-syntax">(),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_GradingWrongKOV</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">measurement_node</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"the property value given here is the wrong kind"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"and does not match the property being looked at."</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_threshold</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"Can't get literal from <%W>\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_threshold_text</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::definition_problem</span><span class="plain-syntax">(</span><span class="identifier-syntax">Task::syntax_tree</span><span class="plain-syntax">(),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_GradingNonLiteral</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">measurement_node</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"that definition is wrongly phrased"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"assuming it was meant to be a grading adjective like 'Definition: a "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"container is large if its carrying capacity is 10 or more.'"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="identifier-syntax">region_threshold_evaluated</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="3-msr.html#SP9">§9</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP10" class="paragraph-anchor"></a><b>§10. </b>To recover safely from these errors, we would be wise to check:
|
|
</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">Measurements::is_valid</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">Measurements::is_valid</span></span>:<br/><a href="3-msr.html#SP7">§7</a>, <a href="3-msr.html#SP11">§11</a><br/>Measurement Adjectives - <a href="3-ma.html#SP4">§4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">measurement_definition</span><span class="plain-syntax"> *</span><span class="identifier-syntax">mdef</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">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">prop</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_threshold_evaluated</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">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP11" class="paragraph-anchor"></a><b>§11. Comparative forms. </b>For timing reasons, these are made all at once, and later than when the headword
|
|
adjectives and superlatives are made.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Measurements::create_comparatives</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">Measurements::create_comparatives</span></span>:<br/>Comparative Relations - <a href="3-cr.html#SP3">§3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">measurement_definition</span><span class="plain-syntax"> *</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER</span><span class="plain-syntax">(</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">, </span><span class="reserved-syntax">measurement_definition</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><a href="3-msr.html#SP9" class="function-link"><span class="function-syntax">Measurements::validate</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">mdef</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="3-msr.html#SP10" class="function-link"><span class="function-syntax">Measurements::is_valid</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">)) &&</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_shape</span><span class="plain-syntax"> != </span><span class="constant-syntax">MEASURE_T_EXACTLY</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">H</span><span class="plain-syntax"> = </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">headword</span><span class="plain-syntax">; </span><span class="comment-syntax"> word number of, e.g., "tall"</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">comparative_form</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Grading::make_comparative</span><span class="plain-syntax">(</span><span class="identifier-syntax">H</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Task::language_of_syntax</span><span class="plain-syntax">()); </span><span class="comment-syntax"> "taller than"</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">vocabulary_entry</span><span class="plain-syntax"> *</span><span class="identifier-syntax">quiddity</span><span class="plain-syntax"> =</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">Lexer::word</span><span class="plain-syntax">(</span><span class="identifier-syntax">Wordings::first_wn</span><span class="plain-syntax">(</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">Grading::make_quiddity</span><span class="plain-syntax">(</span><span class="identifier-syntax">H</span><span class="plain-syntax">, </span><span class="identifier-syntax">Task::language_of_syntax</span><span class="plain-syntax">()))); </span><span class="comment-syntax"> "tallness"</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">i6_schema</span><span class="plain-syntax"> *</span><span class="identifier-syntax">schema_to_compare_property_values</span><span class="plain-syntax">;</span>
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|
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="3-msr.html#SP11_1" class="named-paragraph-link"><span class="named-paragraph">Work out property comparison schema</span><span class="named-paragraph-number">11.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="3-msr.html#SP11_2" class="named-paragraph-link"><span class="named-paragraph">Construct a BP named for the quiddity and tested using the comparative schema</span><span class="named-paragraph-number">11.2</span></a></span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP11_1" class="paragraph-anchor"></a><b>§11.1. </b>This schema compares the property values:
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|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Work out property comparison schema</span><span class="named-paragraph-number">11.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">identifier</span><span class="plain-syntax"> = </span><span class="identifier-syntax">RTProperties::iname</span><span class="plain-syntax">(</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">prop</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">char</span><span class="plain-syntax"> *</span><span class="identifier-syntax">operation</span><span class="plain-syntax"> = </span><a href="3-msr.html#SP3" class="function-link"><span class="function-syntax">Measurements::strict_comparison</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_shape</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">schema_to_compare_property_values</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Calculus::Schemas::new</span><span class="plain-syntax">(</span><span class="string-syntax">"(*1.%n %s *2.%n)"</span><span class="plain-syntax">, </span><span class="identifier-syntax">identifier</span><span class="plain-syntax">, </span><span class="identifier-syntax">operation</span><span class="plain-syntax">, </span><span class="identifier-syntax">identifier</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="3-msr.html#SP11">§11</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP11_2" class="paragraph-anchor"></a><b>§11.2. </b>The relation arising from "tall" would be called the "tallness relation", for
|
|
instance. Note that we don't say anything about the domain of \(x\) and \(y\)
|
|
in \(T(x, y)\). That's because we a value property like "height" may exist
|
|
for more than one kind of object, and there is not necessarily any unifying
|
|
kind of value \(K\) such all objects satisfying \(K\) possess a height and all
|
|
others do not. (That's intentional: it is Inform's one concession towards
|
|
multiple-inheritance, and it allows containers and doors to share lockability
|
|
behaviour despite being of mutually incompatible kinds.)
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Construct a BP named for the quiddity and tested using the comparative schema</span><span class="named-paragraph-number">11.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">binary_predicate</span><span class="plain-syntax"> *</span><span class="identifier-syntax">bp</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">relname</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">relname</span><span class="plain-syntax">, </span><span class="string-syntax">"%V"</span><span class="plain-syntax">, </span><span class="identifier-syntax">quiddity</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">bp</span><span class="plain-syntax"> = </span><span class="identifier-syntax">BinaryPredicates::make_pair</span><span class="plain-syntax">(</span><span class="identifier-syntax">property_comparison_bp_family</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">BPTerms::new</span><span class="plain-syntax">(</span><span class="identifier-syntax">NULL</span><span class="plain-syntax">), </span><span class="identifier-syntax">BPTerms::new</span><span class="plain-syntax">(</span><span class="identifier-syntax">NULL</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">relname</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">schema_to_compare_property_values</span><span class="plain-syntax">, </span><span class="identifier-syntax">WordAssemblages::lit_1</span><span class="plain-syntax">(</span><span class="identifier-syntax">quiddity</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">relname</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="3-cr.html#SP4" class="function-link"><span class="function-syntax">ComparativeRelations::initialise</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">bp</span><span class="plain-syntax">, </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">region_shape</span><span class="plain-syntax">, </span><span class="identifier-syntax">mdef</span><span class="plain-syntax">-></span><span class="element-syntax">prop</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="3-msr.html#SP12" class="function-link"><span class="function-syntax">Measurements::register_comparative</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">comparative_form</span><span class="plain-syntax">, </span><span class="identifier-syntax">bp</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="3-msr.html#SP11">§11</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP12" class="paragraph-anchor"></a><b>§12. Late registration of prepositions comparing properties. </b>The following routines, used only when all the properties have been
|
|
created, make suitable comparatives ("bigger than", etc.) and
|
|
prepositional usages to test property-equality ("the same height as").
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Measurements::register_comparative</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">Measurements::register_comparative</span></span>:<br/><a href="3-msr.html#SP11_2">§11.2</a></span></button><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">binary_predicate</span><span class="plain-syntax"> *</span><span class="identifier-syntax">root</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">verb_meaning</span><span class="plain-syntax"> </span><span class="identifier-syntax">vm</span><span class="plain-syntax"> = </span><span class="identifier-syntax">VerbMeanings::regular</span><span class="plain-syntax">(</span><span class="identifier-syntax">root</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">preposition</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prep</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Prepositions::make</span><span class="plain-syntax">(</span><span class="identifier-syntax">PreformUtilities::merge</span><span class="plain-syntax">(</span><span class="function-syntax"><comparative-property-construction></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">WordAssemblages::lit_1</span><span class="plain-syntax">(</span><span class="identifier-syntax">Lexer::word</span><span class="plain-syntax">(</span><span class="identifier-syntax">Wordings::first_wn</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">)))),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">current_sentence</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Verbs::add_form</span><span class="plain-syntax">(</span><span class="identifier-syntax">copular_verb</span><span class="plain-syntax">, </span><span class="identifier-syntax">prep</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">vm</span><span class="plain-syntax">, </span><span class="identifier-syntax">SVO_FS_BIT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP13" class="paragraph-anchor"></a><b>§13. </b>When the source text creates a measurement adjective such as "tall", the
|
|
following is used to construct the comparative form, "taller than":
|
|
</p>
|
|
|
|
<pre class="Preform-displayed-code all-displayed-code code-font">
|
|
<span class="Preform-function-syntax"><comparative-property-construction></span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
|
|
<span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">...</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">than</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This is <a href="../words-module/4-ap.html" class="internal">Preform grammar</a>, not regular C code.</li></ul>
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