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<!--Weave of 'Tree Conversions' generated by Inweb-->
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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#11">Chapter 11: Predicate Calculus</a></li><li><b>Tree Conversions</b></li></ul></div>
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<p class="purpose">The second of the three sources of propositions to conjure with: those which arise from subtrees constructed by the A-parser.</p>
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<ul class="toc"><li><a href="11-tc.html#SP1">§1. Elementary propositions</a></li><li><a href="11-tc.html#SP6">§6. Property setting</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. Elementary propositions. </b>The S-parser attacks whole sentences, but the A-parser more cautiously takes
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on only fragments, and so it makes much shorter propositions — usually with
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a single free variable representing an object or value to which something
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must be done.
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</p>
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<p class="commentary">We start with some elementary propositions which create things, by asserting
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their existence.
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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">pcalc_prop</span><span class="plain-syntax"> *</span><span class="function-syntax">Calculus::Propositions::Abstract::to_make_a_kind</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">Calculus::Propositions::Abstract::to_make_a_kind</span></span>:<br/>The Creator - <a href="5-tc.html#SP5_4_1_1">§5.4.1.1</a>, <a href="5-tc.html#SP5_4_2_1">§5.4.2.1</a><br/>Condition Properties - <a href="15-cp.html#SP3">§3</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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">Calculus::Atoms::ISAKIND_new</span><span class="plain-syntax">(</span><span class="identifier-syntax">Calculus::Terms::new_variable</span><span class="plain-syntax">(0), </span><span class="identifier-syntax">K</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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<span class="identifier-syntax">pcalc_prop</span><span class="plain-syntax"> *</span><span class="function-syntax">Calculus::Propositions::Abstract::to_make_a_var</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">Calculus::Propositions::Abstract::to_make_a_var</span></span>:<br/>The Creator - <a href="5-tc.html#SP5_4_2_2">§5.4.2.2</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">void</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">Calculus::Atoms::ISAVAR_new</span><span class="plain-syntax">(</span><span class="identifier-syntax">Calculus::Terms::new_variable</span><span class="plain-syntax">(0));</span>
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<span class="plain-syntax">}</span>
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<span class="identifier-syntax">pcalc_prop</span><span class="plain-syntax"> *</span><span class="function-syntax">Calculus::Propositions::Abstract::to_make_a_const</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">Calculus::Propositions::Abstract::to_make_a_const</span></span>:<br/>The Creator - <a href="5-tc.html#SP5_4_2_2">§5.4.2.2</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">void</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">Calculus::Atoms::ISACONST_new</span><span class="plain-syntax">(</span><span class="identifier-syntax">Calculus::Terms::new_variable</span><span class="plain-syntax">(0));</span>
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<span class="plain-syntax">}</span>
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<span class="identifier-syntax">pcalc_prop</span><span class="plain-syntax"> *</span><span class="function-syntax">Calculus::Propositions::Abstract::to_create_something</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">Calculus::Propositions::Abstract::to_create_something</span></span>:<br/>New Property Requests - <a href="4-npr.html#SP5_11">§5.11</a><br/>The Creator - <a href="5-tc.html#SP5_4_1_1">§5.4.1.1</a>, <a href="5-tc.html#SP5_4_2_1">§5.4.2.1</a>, <a href="5-tc.html#SP5_4_2_2">§5.4.2.2</a>, <a href="5-tc.html#SP5_4_2_3">§5.4.2.3</a>, <a href="5-tc.html#SP8_4_1">§8.4.1</a>, <a href="5-tc.html#SP12">§12</a><br/>Condition Properties - <a href="15-cp.html#SP3">§3</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="identifier-syntax">wording</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">pcalc_prop</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Calculus::Atoms::QUANTIFIER_new</span><span class="plain-syntax">(</span><span class="identifier-syntax">exists_quantifier</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">K</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">K_object</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">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><span class="identifier-syntax">Calculus::Atoms::KIND_new</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">Calculus::Terms::new_variable</span><span class="plain-syntax">(0)));</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">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><span class="identifier-syntax">Calculus::Atoms::CALLED_new</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">, </span><span class="identifier-syntax">Calculus::Terms::new_variable</span><span class="plain-syntax">(0), </span><span class="identifier-syntax">K</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">prop</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. </b>A proposition to assert that an object has a given kind:
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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">pcalc_prop</span><span class="plain-syntax"> *</span><span class="function-syntax">Calculus::Propositions::Abstract::prop_to_set_kind</span><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><span class="identifier-syntax">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="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">Calculus::Atoms::KIND_new</span><span class="plain-syntax">(</span><span class="identifier-syntax">k</span><span class="plain-syntax">, </span><span class="identifier-syntax">Calculus::Terms::new_variable</span><span class="plain-syntax">(0));</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Calculus::Propositions::Abstract::assert_kind_of_object</span><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><span class="identifier-syntax">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><a href="12-ap.html#SP4" class="function-link"><span class="function-syntax">Calculus::Propositions::Assert::assert_true_about</span></a><span class="plain-syntax">(</span><a href="11-tc.html#SP2" class="function-link"><span class="function-syntax">Calculus::Propositions::Abstract::prop_to_set_kind</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</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><a href="6-ins.html#SP12" class="function-link"><span class="function-syntax">Instances::as_subject</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</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>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Calculus::Propositions::Abstract::assert_kind_of_subject</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">Calculus::Propositions::Abstract::assert_kind_of_subject</span></span>:<br/>The Creator - <a href="5-tc.html#SP5_2_1">§5.2.1</a><br/>Assertions - <a href="5-ass.html#SP6_3_8">§6.3.8</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inst</span><span class="plain-syntax">, </span><span class="reserved-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new</span><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">subject_to</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><a href="16-is.html#SP20" class="function-link"><span class="function-syntax">InferenceSubjects::domain</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">new</span><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><span class="identifier-syntax">Calculus::Atoms::KIND_new</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">Calculus::Terms::new_variable</span><span class="plain-syntax">(0));</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">subject_to</span><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><span class="identifier-syntax">subject_to</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_about</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop</span><span class="plain-syntax">, </span><span class="identifier-syntax">inst</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>
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</pre>
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<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>§3. </b>Now propositions to assert that relations hold:
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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">pcalc_prop</span><span class="plain-syntax"> *</span><span class="function-syntax">Calculus::Propositions::Abstract::to_set_simple_relation</span><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="reserved-syntax">instance</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">spec</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">I</span><span class="plain-syntax">) </span><span class="identifier-syntax">spec</span><span class="plain-syntax"> = </span><a href="14-rv.html#SP3" class="function-link"><span class="function-syntax">Rvalues::from_instance</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">spec</span><span class="plain-syntax"> = </span><a href="14-rv.html#SP5" class="function-link"><span class="function-syntax">Rvalues::new_nothing_object_constant</span></a><span class="plain-syntax">();</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">Calculus::Atoms::binary_PREDICATE_new</span><span class="plain-syntax">(</span><span class="identifier-syntax">bp</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Calculus::Terms::new_variable</span><span class="plain-syntax">(0), </span><span class="identifier-syntax">Calculus::Terms::new_constant</span><span class="plain-syntax">(</span><span class="identifier-syntax">spec</span><span class="plain-syntax">));</span>
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<span class="plain-syntax">}</span>
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<span class="identifier-syntax">pcalc_prop</span><span class="plain-syntax"> *</span><span class="function-syntax">Calculus::Propositions::Abstract::to_set_relation</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">Calculus::Propositions::Abstract::to_set_relation</span></span>:<br/>Property Knowledge - <a href="5-pk.html#SP2">§2</a><br/>Relation Knowledge - <a href="5-rk.html#SP3">§3</a><br/>Compile Invocations - <a href="25-ci.html#SP2_2_3_4_1_1_1">§2.2.3.4.1.1.1</a><br/>Compile Phrases - <a href="25-cp.html#SP4_3_5_3">§4.3.5.3</a></span></button><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>
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<span class="plain-syntax"> </span><span class="reserved-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="identifier-syntax">infs0</span><span class="plain-syntax">, </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">spec0</span><span class="plain-syntax">, </span><span class="reserved-syntax">inference_subject</span><span class="plain-syntax"> *</span><span class="identifier-syntax">infs1</span><span class="plain-syntax">, </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">spec1</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">pcalc_term</span><span class="plain-syntax"> </span><span class="identifier-syntax">pt0</span><span class="plain-syntax">, </span><span class="identifier-syntax">pt1</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">infs0</span><span class="plain-syntax">) </span><span class="identifier-syntax">pt0</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Calculus::Terms::new_constant</span><span class="plain-syntax">(</span><a href="16-is.html#SP17" class="function-link"><span class="function-syntax">InferenceSubjects::as_constant</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">infs0</span><span class="plain-syntax">));</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">pt0</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Calculus::Terms::new_constant</span><span class="plain-syntax">(</span><span class="identifier-syntax">spec0</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">infs1</span><span class="plain-syntax">) </span><span class="identifier-syntax">pt1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Calculus::Terms::new_constant</span><span class="plain-syntax">(</span><a href="16-is.html#SP17" class="function-link"><span class="function-syntax">InferenceSubjects::as_constant</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">infs1</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">pt1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Calculus::Terms::new_constant</span><span class="plain-syntax">(</span><span class="identifier-syntax">spec1</span><span class="plain-syntax">);</span>
|
|
<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><span class="identifier-syntax">Calculus::Atoms::binary_PREDICATE_new</span><span class="plain-syntax">(</span><span class="identifier-syntax">bp</span><span class="plain-syntax">, </span><span class="identifier-syntax">pt0</span><span class="plain-syntax">, </span><span class="identifier-syntax">pt1</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">dummy</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prop</span><span class="plain-syntax"> = </span><a href="11-sm.html#SP7" class="function-link"><span class="function-syntax">Calculus::Simplifications::make_kinds_of_value_explicit</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop</span><span class="plain-syntax">, &</span><span class="identifier-syntax">dummy</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">prop</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>§4. </b>Property provision is itself a relation:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">pcalc_prop</span><span class="plain-syntax"> *</span><span class="function-syntax">Calculus::Propositions::Abstract::to_provide_property</span><button class="popup" onclick="togglePopup('usagePopup7')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup7">Usage of <span class="code-font"><span class="function-syntax">Calculus::Propositions::Abstract::to_provide_property</span></span>:<br/>Define by Table Requests - <a href="4-dbtr.html#SP4_2">§4.2</a><br/>New Property Requests - <a href="4-npr.html#SP5_9">§5.9</a>, <a href="4-npr.html#SP5_10">§5.10</a><br/>New Property Assertions - <a href="5-npa.html#SP1_1">§1.1</a><br/>Relations - <a href="7-rlt.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>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">Calculus::Atoms::binary_PREDICATE_new</span><span class="plain-syntax">(</span><span class="identifier-syntax">R_provision</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Calculus::Terms::new_variable</span><span class="plain-syntax">(0), </span><span class="identifier-syntax">Calculus::Terms::new_constant</span><span class="plain-syntax">(</span><a href="14-rv.html#SP1" class="function-link"><span class="function-syntax">Rvalues::from_property</span></a><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">pcalc_prop</span><span class="plain-syntax"> *</span><span class="function-syntax">Calculus::Propositions::Abstract::to_set_property</span><button class="popup" onclick="togglePopup('usagePopup8')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup8">Usage of <span class="code-font"><span class="function-syntax">Calculus::Propositions::Abstract::to_set_property</span></span>:<br/><a href="11-tc.html#SP6">§6</a><br/>Valued Properties - <a href="15-vp.html#SP10">§10</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="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">val</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">val</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">if</span><span class="plain-syntax"> (</span><a href="15-vp.html#SP7" class="function-link"><span class="function-syntax">Properties::Valued::get_setting_bp</span></a><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">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"no BP for this property"</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">Calculus::Atoms::binary_PREDICATE_new</span><span class="plain-syntax">(</span><a href="15-vp.html#SP7" class="function-link"><span class="function-syntax">Properties::Valued::get_setting_bp</span></a><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">Calculus::Terms::new_variable</span><span class="plain-syntax">(0), </span><span class="identifier-syntax">Calculus::Terms::new_constant</span><span class="plain-syntax">(</span><span class="identifier-syntax">val</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP5" class="paragraph-anchor"></a><b>§5. </b>"Everywhere", "nowhere" and "here":
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">pcalc_prop</span><span class="plain-syntax"> *</span><span class="function-syntax">Calculus::Propositions::Abstract::to_put_everywhere</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">Calculus::Atoms::EVERYWHERE_new</span><span class="plain-syntax">(</span><span class="identifier-syntax">Calculus::Terms::new_variable</span><span class="plain-syntax">(0));</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="identifier-syntax">pcalc_prop</span><span class="plain-syntax"> *</span><span class="function-syntax">Calculus::Propositions::Abstract::to_put_nowhere</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">Calculus::Atoms::NOWHERE_new</span><span class="plain-syntax">(</span><span class="identifier-syntax">Calculus::Terms::new_variable</span><span class="plain-syntax">(0));</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="identifier-syntax">pcalc_prop</span><span class="plain-syntax"> *</span><span class="function-syntax">Calculus::Propositions::Abstract::to_put_here</span><button class="popup" onclick="togglePopup('usagePopup9')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup9">Usage of <span class="code-font"><span class="function-syntax">Calculus::Propositions::Abstract::to_put_here</span></span>:<br/>Relation Knowledge - <a href="5-rk.html#SP1_2">§1.2</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">Calculus::Atoms::HERE_new</span><span class="plain-syntax">(</span><span class="identifier-syntax">Calculus::Terms::new_variable</span><span class="plain-syntax">(0));</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP6" class="paragraph-anchor"></a><b>§6. Property setting. </b>Sometimes the A-parser wants to assert that a given property has the value
|
|
whose text can be found in a node <span class="extract"><span class="extract-syntax">py</span></span>...
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">pcalc_prop</span><span class="plain-syntax"> *</span><span class="function-syntax">Calculus::Propositions::Abstract::from_property_subtree</span><button class="popup" onclick="togglePopup('usagePopup10')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup10">Usage of <span class="code-font"><span class="function-syntax">Calculus::Propositions::Abstract::from_property_subtree</span></span>:<br/><a href="11-tc.html#SP7_1">§7.1</a><br/>Property Knowledge - <a href="5-pk.html#SP3">§3</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="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">py</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="11-tc.html#SP4" class="function-link"><span class="function-syntax">Calculus::Propositions::Abstract::to_set_property</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</span><span class="plain-syntax">, </span><a href="5-pk.html#SP4" class="function-link"><span class="function-syntax">Assertions::PropertyKnowledge::property_value_from_property_subtree</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</span><span class="plain-syntax">, </span><span class="identifier-syntax">py</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 sometimes it wants to assert a more elaborate list, such as "carrying
|
|
capacity 10 and weight 4kg" or "lockable unlocked". This is a syntax
|
|
allowed by the A-parser but not the S-parser, and here is where we deal
|
|
with it.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">pcalc_prop</span><span class="plain-syntax"> *</span><span class="function-syntax">Calculus::Propositions::Abstract::from_property_list</span><button class="popup" onclick="togglePopup('usagePopup11')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup11">Usage of <span class="code-font"><span class="function-syntax">Calculus::Propositions::Abstract::from_property_list</span></span>:<br/>Property Knowledge - <a href="5-pk.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">p</span><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="identifier-syntax">pcalc_prop</span><span class="plain-syntax"> *</span><span class="identifier-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="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">p</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax">(</span><span class="identifier-syntax">Node::get_type</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">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">AND_NT:</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">p</span><span class="plain-syntax"> = </span><span class="identifier-syntax">p</span><span class="plain-syntax">-></span><span class="element-syntax">down</span><span class="plain-syntax">; </span><span class="identifier-syntax">p</span><span class="plain-syntax">; </span><span class="identifier-syntax">p</span><span class="plain-syntax"> = </span><span class="identifier-syntax">p</span><span class="plain-syntax">-></span><span class="element-syntax">next</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prop</span><span class="plain-syntax"> = </span><a href="11-pr.html#SP15" class="function-link"><span class="function-syntax">Calculus::Propositions::conjoin</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop</span><span class="plain-syntax">, </span><a href="11-tc.html#SP7" class="function-link"><span class="function-syntax">Calculus::Propositions::Abstract::from_property_list</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">p</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">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">PROPERTY_LIST_NT:</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="11-tc.html#SP7_1" class="named-paragraph-link"><span class="named-paragraph">Conjoin atoms to assert from a property list</span><span class="named-paragraph-number">7.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">ADJECTIVE_NT:</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="11-tc.html#SP7_2" class="named-paragraph-link"><span class="named-paragraph">Conjoin atoms to assert from an adjective node</span><span class="named-paragraph-number">7.2</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">default:</span><span class="plain-syntax"> </span><span class="identifier-syntax">internal_error_on_node_type</span><span class="plain-syntax">(</span><span class="identifier-syntax">p</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">prop</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">K</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prop</span><span class="plain-syntax"> = </span><a href="11-pr.html#SP15" class="function-link"><span class="function-syntax">Calculus::Propositions::conjoin</span></a><span class="plain-syntax">(</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Calculus::Atoms::KIND_new</span><span class="plain-syntax">(</span><span class="identifier-syntax">K</span><span class="plain-syntax">, </span><span class="identifier-syntax">Calculus::Terms::new_variable</span><span class="plain-syntax">(0)), </span><span class="identifier-syntax">prop</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">prop</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP7_1" class="paragraph-anchor"></a><b>§7.1. </b>Recall that a <span class="extract"><span class="extract-syntax">PROPERTY_LIST_NT</span></span> node is unannotated, as yet, and we have to
|
|
parse the text to find what which property is referred to.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Conjoin atoms to assert from a property list</span><span class="named-paragraph-number">7.1</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">property</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="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><span class="identifier-syntax">VW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">EMPTY_WORDING</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="11-tc.html#SP7_1_1" class="named-paragraph-link"><span class="named-paragraph">Divide the property list entry into property name and value text</span><span class="named-paragraph-number">7.1.1</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">Wordings::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">PW</span><span class="plain-syntax">)) && (</span><span class="function-syntax"><property-name></span><span class="plain-syntax">(</span><span class="identifier-syntax">PW</span><span class="plain-syntax">))) </span><span class="identifier-syntax">prn</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">prn</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="11-tc.html#SP7_1_2" class="named-paragraph-link"><span class="named-paragraph">Issue a problem message for no-such-property</span><span class="named-paragraph-number">7.1.2</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">Wordings::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">VW</span><span class="plain-syntax">)) { </span><span class="comment-syntax"> a value is supplied...</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="15-pr.html#SP15" class="function-link"><span class="function-syntax">Properties::is_either_or</span></a><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">Problems::quote_source</span><span class="plain-syntax">(1, </span><span class="identifier-syntax">current_sentence</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_wording</span><span class="plain-syntax">(2, </span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">p</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="2-sq.html#SP2" class="function-link"><span class="function-syntax">Problems::quote_property</span></a><span class="plain-syntax">(3, </span><span class="identifier-syntax">prn</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_wording</span><span class="plain-syntax">(4, </span><span class="identifier-syntax">VW</span><span class="plain-syntax">);</span>
|
|
<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_WithEitherOrValue</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_segment</span><span class="plain-syntax">(</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"The sentence '%1' seems to be trying to create something which "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"has '%2', where the %3 property is being set equal to %4. But "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"this made no sense to me, because %3 is an either/or property "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"and cannot have a value."</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_end</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>
|
|
<span class="plain-syntax"> </span><span class="function-syntax"><np-as-object></span><span class="plain-syntax">(</span><span class="identifier-syntax">VW</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">parse_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pn</span><span class="plain-syntax"> = </span><span class="function-syntax"><<rp>></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="5-rpt.html#SP10" class="function-link"><span class="function-syntax">Refiner::refine</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">pn</span><span class="plain-syntax">, </span><span class="constant-syntax">FORBID_CREATION</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">pcalc_prop</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><a href="11-tc.html#SP6" class="function-link"><span class="function-syntax">Calculus::Propositions::Abstract::from_property_subtree</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</span><span class="plain-syntax">, </span><span class="identifier-syntax">pn</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prop</span><span class="plain-syntax"> = </span><a href="11-pr.html#SP15" class="function-link"><span class="function-syntax">Calculus::Propositions::conjoin</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop</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">else</span><span class="plain-syntax"> { </span><span class="comment-syntax"> no value is supplied...</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="15-pr.html#SP15" class="function-link"><span class="function-syntax">Properties::is_either_or</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prn</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">Problems::quote_source</span><span class="plain-syntax">(1, </span><span class="identifier-syntax">current_sentence</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_wording</span><span class="plain-syntax">(2, </span><span class="identifier-syntax">Node::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">p</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="2-sq.html#SP2" class="function-link"><span class="function-syntax">Problems::quote_property</span></a><span class="plain-syntax">(3, </span><span class="identifier-syntax">prn</span><span class="plain-syntax">);</span>
|
|
<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">(4, </span><a href="15-vp.html#SP5" class="function-link"><span class="function-syntax">Properties::Valued::kind</span></a><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">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_WithValuelessValue</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_segment</span><span class="plain-syntax">(</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"The sentence '%1' seems to be trying to create something which "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"has '%2', where the %3 property is being set in some way. But "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"this made no sense to me, because %3 is a value property (it "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"needs to be %4) and no value for it was given here."</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_end</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>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prop</span><span class="plain-syntax"> = </span><a href="11-pr.html#SP15" class="function-link"><span class="function-syntax">Calculus::Propositions::conjoin</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop</span><span class="plain-syntax">, </span><a href="11-tc.html#SP6" class="function-link"><span class="function-syntax">Calculus::Propositions::Abstract::from_property_subtree</span></a><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="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="11-tc.html#SP7">§7</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP7_1_1" class="paragraph-anchor"></a><b>§7.1.1. </b>The node has text in the form "property name property value", with no
|
|
obvious division of punctuation between the two. What makes matters worse
|
|
is that we do not yet know all the property names, nor do we have the
|
|
ability to discern values. So we seek the division by
|
|
</p>
|
|
|
|
<ul class="items"><li>(i) trying to find the longest known property name at the start of the
|
|
text; if there is no known name,
|
|
</li><li>(ii) we see if the final word of the text is a literal, such as a number or
|
|
a quoted text, and if so we assume this is the entire property value and
|
|
that the rest is property name; and otherwise
|
|
</li><li>(iii) we assume the property name is one word only.
|
|
</li></ul>
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Divide the property list entry into property name and value text</span><span class="named-paragraph-number">7.1.1</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">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">W</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Articles::remove_the</span><span class="plain-syntax">(</span><span class="identifier-syntax">Node::get_text</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">Wordings::empty</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-up.html#SP5" class="function-link"><span class="function-syntax">Problems::Using::assertion_problem</span></a><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="plain-syntax"> </span><span class="string-syntax">"this looked to me as if it might be trying to create something "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"which has certain properties"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"and that made no sense on investigation. This sometimes happens "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"if a sentence uses 'to have' oddly?"</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>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">name_length</span><span class="plain-syntax"> = </span><a href="15-pr.html#SP12" class="function-link"><span class="function-syntax">Properties::match_longest</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">W</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">name_length</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">name_length</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</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></span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">)) </span><span class="identifier-syntax">name_length</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Wordings::length</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">) - </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">PW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Wordings::up_to</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</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="identifier-syntax">name_length</span><span class="plain-syntax"> - </span><span class="constant-syntax">1</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">VW</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Wordings::from</span><span class="plain-syntax">(</span><span class="identifier-syntax">W</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="identifier-syntax">name_length</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="11-tc.html#SP7_1">§7.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP7_1_2" class="paragraph-anchor"></a><b>§7.1.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Issue a problem message for no-such-property</span><span class="named-paragraph-number">7.1.2</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">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"Failed property list: pname = <%W>; pval = <%W>\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">PW</span><span class="plain-syntax">, </span><span class="identifier-syntax">VW</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-up.html#SP5" class="function-link"><span class="function-syntax">Problems::Using::assertion_problem</span></a><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_BadPropertyList</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"this looked to me as if it might be trying to create something "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"which has certain properties"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"and that made no sense on investigation. This sometimes happens "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"if a sentence uses 'with' a little too liberally, or to specify "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"a never-declared property. For instance, 'An antique is a kind of "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"thing with an age.' would not be the right way to declare the "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"property 'age' (because it does not tell Inform what kind of "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"value this would be). Instead, try 'An antique is a kind of "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"thing. An antique has a number called age.' It would then be all "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"right to say 'The Louis Quinze chair is an antique with age 241.'"</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>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="11-tc.html#SP7_1">§7.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP7_2" class="paragraph-anchor"></a><b>§7.2. </b>An <span class="extract"><span class="extract-syntax">ADJECTIVE_NT</span></span> node, on the other hand, is annotated with a valid
|
|
property name <span class="extract"><span class="extract-syntax">property</span></span> already, and may also have a value ready to put
|
|
into that property, stored in <span class="extract"><span class="extract-syntax">evaluation</span></span>. Nodes like this have been
|
|
created from descriptions like "open openable door in the kitchen", and
|
|
it's important not to lose the location information ("in the kitchen"),
|
|
which is by now inside the "creation proposition".
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Conjoin atoms to assert from an adjective node</span><span class="named-paragraph-number">7.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">negate_me</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">unary_predicate</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pred</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Node::get_predicate</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">pred</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"adjective without predicate"</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">UnaryPredicates::get_parity</span><span class="plain-syntax">(</span><span class="identifier-syntax">pred</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) </span><span class="identifier-syntax">negate_me</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Node::get_creation_proposition</span><span class="plain-syntax">(</span><span class="identifier-syntax">p</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prop</span><span class="plain-syntax"> = </span><a href="11-pr.html#SP15" class="function-link"><span class="function-syntax">Calculus::Propositions::conjoin</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop</span><span class="plain-syntax">, </span><span class="identifier-syntax">Node::get_creation_proposition</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">negate_me</span><span class="plain-syntax">) </span><span class="identifier-syntax">prop</span><span class="plain-syntax"> = </span><a href="11-pr.html#SP15" class="function-link"><span class="function-syntax">Calculus::Propositions::conjoin</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop</span><span class="plain-syntax">, </span><span class="identifier-syntax">Calculus::Atoms::new</span><span class="plain-syntax">(</span><span class="identifier-syntax">NEGATION_OPEN_ATOM</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">prop</span><span class="plain-syntax"> = </span><a href="11-pr.html#SP15" class="function-link"><span class="function-syntax">Calculus::Propositions::conjoin</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop</span><span class="plain-syntax">, </span><span class="identifier-syntax">Calculus::Atoms::unary_PREDICATE_from_aph</span><span class="plain-syntax">(</span><span class="identifier-syntax">UnaryPredicates::get_adj</span><span class="plain-syntax">(</span><span class="identifier-syntax">pred</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">negate_me</span><span class="plain-syntax">) </span><span class="identifier-syntax">prop</span><span class="plain-syntax"> = </span><a href="11-pr.html#SP15" class="function-link"><span class="function-syntax">Calculus::Propositions::conjoin</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop</span><span class="plain-syntax">, </span><span class="identifier-syntax">Calculus::Atoms::new</span><span class="plain-syntax">(</span><span class="identifier-syntax">NEGATION_CLOSE_ATOM</span><span class="plain-syntax">));</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="11-tc.html#SP7">§7</a>.</li></ul>
|
|
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