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<title>12/is</title>
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<!--Weave of '12/ca' generated by 7-->
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<ul class="crumbs"><li><a href="../webs.html">★</a></li><li><a href="index.html">core</a></li><li><a href="index.html#12">Chapter 12: Use of Propositions</a></li><li><b>Compile Atoms</b></li></ul><p class="purpose">In this section, given an atom of a proposition we compile I6 code as required for any of three possible outcomes: (i) to test whether it is true, (ii) to make it henceforth true, or (iii) to make it henceforth false.</p>
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<ul class="toc"><li><a href="#SP1">§1. Definitions</a></li><li><a href="#SP5_1">§5.1. Stage 1</a></li><li><a href="#SP5_2">§5.2. Stage 2</a></li><li><a href="#SP6">§6. Constructing the schema</a></li><li><a href="#SP8">§8. An unannotated one</a></li></ul><hr class="tocbar">
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<p class="inwebparagraph"><a id="SP1"></a><b>§1. Definitions. </b></p>
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<p class="inwebparagraph"><a id="SP2"></a><b>§2. </b>The compilation method is to look at the atom, work out a suitable I6
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schema involving code to be applied to the one or two terms attaching to
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the atom, and then expand this. In some circumstances, the process of
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finding the schema will reveal that we need to apply it to different terms
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from those originally found in the atom, however, so we also need to keep
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track of that; and also of whether a condition is being regarded
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negatively.
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</p>
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<pre class="display">
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<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">annotated_i6_schema</span><span class="plain"> {</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">i6_schema</span><span class="plain"> *</span><span class="identifier">schema</span><span class="plain">;</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">negate_schema</span><span class="plain">; </span> <span class="comment">true if atom is to be tested with the opposite parity</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">pcalc_term</span><span class="plain"> </span><span class="identifier">pt0</span><span class="plain">; </span> <span class="comment">terms on which the I6 schema is to be expanded</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">pcalc_term</span><span class="plain"> </span><span class="identifier">pt1</span><span class="plain">;</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">involves_action_variables</span><span class="plain">;</span>
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<span class="plain">} </span><span class="reserved">annotated_i6_schema</span><span class="plain">;</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The structure annotated_i6_schema is accessed in 6/bp, 6/tur, 12/ter, 12/qr, 15/tpr, 15/cr, 15/spr2 and here.</p>
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<p class="inwebparagraph"><a id="SP3"></a><b>§3. </b>Some constants to enumerate the three cases of what we are to do. This
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looks asymmetrical — shouldn't we also test to see whether an atom is false,
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a fourth case?
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</p>
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<p class="inwebparagraph">The answer is that there's no need, since "test false" can be done by
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compiling "test true" and applying the I7 negation operator <code class="display"><span class="extract">~~</span></code> to the
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result. No similar trick can be used to combine making something
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true or false into a single operation.
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</p>
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<pre class="definitions">
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<span class="definitionkeyword">define</span> <span class="constant">TEST_ATOM_TASK</span><span class="plain"> 1</span>
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<span class="definitionkeyword">define</span> <span class="constant">NOW_ATOM_TRUE_TASK</span><span class="plain"> 2</span>
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<span class="definitionkeyword">define</span> <span class="constant">NOW_ATOM_FALSE_TASK</span><span class="plain"> 3</span>
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</pre>
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<p class="inwebparagraph"><a id="SP4"></a><b>§4. </b>For its internal purposes, Inform is sometimes able to compile atoms which
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wouldn't be allowed in a typical use of "now" from the source text; so it
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can suppress the following problem messages:
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</p>
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<pre class="display">
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">suppress_C14CantChangeKind</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">suppress_C14ActionVarsPastTense</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="inwebparagraph"><a id="SP5"></a><b>§5. </b>So, then:
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</p>
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<pre class="display">
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<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Calculus::Atoms::Compile::emit</span><span class="plain">(</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">task</span><span class="plain">, </span><span class="reserved">pcalc_prop</span><span class="plain"> *</span><span class="identifier">pl</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">with_semicolon</span><span class="plain">) {</span>
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<span class="identifier">value_holster</span><span class="plain"> </span><span class="identifier">VH</span><span class="plain"> = </span><span class="identifier">Holsters::new</span><span class="plain">(</span><span class="identifier">INTER_VAL_VHMODE</span><span class="plain">);</span>
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<span class="functiontext">Calculus::Atoms::Compile::compile</span><span class="plain">(&</span><span class="identifier">VH</span><span class="plain">, </span><span class="identifier">task</span><span class="plain">, </span><span class="identifier">pl</span><span class="plain">, </span><span class="identifier">with_semicolon</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Calculus::Atoms::Compile::compile</span><span class="plain">(</span><span class="identifier">value_holster</span><span class="plain"> *</span><span class="identifier">VH</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">task</span><span class="plain">, </span><span class="reserved">pcalc_prop</span><span class="plain"> *</span><span class="identifier">pl</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">with_semicolon</span><span class="plain">) {</span>
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<span class="reserved">i6_schema</span><span class="plain"> </span><span class="identifier">sch</span><span class="plain">;</span>
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<span class="reserved">annotated_i6_schema</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
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<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">task</span><span class="plain">) {</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="constant">TEST_ATOM_TASK</span><span class="plain">: </span><span class="identifier">LOGIF</span><span class="plain">(</span><span class="identifier">PREDICATE_CALCULUS_WORKINGS</span><span class="plain">, </span><span class="string">"Compiling condition: $o\</span><span class="plain">n</span><span class="string">"</span><span class="plain">, </span><span class="identifier">pl</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="constant">NOW_ATOM_TRUE_TASK</span><span class="plain">: </span><span class="identifier">LOGIF</span><span class="plain">(</span><span class="identifier">PREDICATE_CALCULUS_WORKINGS</span><span class="plain">, </span><span class="string">"Compiling 'now': $o\</span><span class="plain">n</span><span class="string">"</span><span class="plain">, </span><span class="identifier">pl</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="constant">NOW_ATOM_FALSE_TASK</span><span class="plain">: </span><span class="identifier">LOGIF</span><span class="plain">(</span><span class="identifier">PREDICATE_CALCULUS_WORKINGS</span><span class="plain">, </span><span class="string">"Compiling 'now' false: $o\</span><span class="plain">n</span><span class="string">"</span><span class="plain">, </span><span class="identifier">pl</span><span class="plain">); </span><span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">default</span><span class="plain">: </span><span class="identifier">internal_error</span><span class="plain">(</span><span class="string">"unknown compile task"</span><span class="plain">);</span>
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<span class="plain">}</span>
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<<span class="cwebmacro">Stage 1: make an annotated schema from the atom</span> <span class="cwebmacronumber">5.1</span>><span class="plain">;</span>
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<<span class="cwebmacro">Stage 2: expand that schema to the output stream</span> <span class="cwebmacronumber">5.2</span>><span class="plain">;</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function Calculus::Atoms::Compile::emit is used in 12/dtd (<a href="12-dtd.html#SP11">§11</a>), 12/cdp (<a href="12-cdp.html#SP2_1_6_1_2_3_2">§2.1.6.1.2.3.2</a>, <a href="12-cdp.html#SP2_1_6_1_2_3_4">§2.1.6.1.2.3.4</a>).</p>
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<p class="endnote">The function Calculus::Atoms::Compile::compile is used in 12/dtd (<a href="12-dtd.html#SP8">§8</a>).</p>
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<p class="inwebparagraph"><a id="SP5_1"></a><b>§5.1. Stage 1. </b></p>
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<p class="macrodefinition"><code class="display">
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<<span class="cwebmacrodefn">Stage 1: make an annotated schema from the atom</span> <span class="cwebmacronumber">5.1</span>> =
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</code></p>
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<pre class="displaydefn">
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<span class="identifier">asch</span><span class="plain"> = </span><span class="functiontext">Calculus::Atoms::Compile::i6_schema_of_atom</span><span class="plain">(&</span><span class="identifier">sch</span><span class="plain">, </span><span class="identifier">pl</span><span class="plain">, </span><span class="identifier">task</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">asch</span><span class="element">.schema</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">problem_count</span><span class="plain"> == 0)</span>
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<<span class="cwebmacro">Issue a fallback problem message, since the schema-maker evidently didn't</span> <span class="cwebmacronumber">5.1.1</span>><span class="character">;</span>
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<span class="reserved">return</span><span class="plain">;</span>
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<span class="plain">}</span>
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<<span class="cwebmacro">Reject all discussion of the action variables in the past tense</span> <span class="cwebmacronumber">5.1.2</span>><span class="plain">;</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">This code is used in <a href="#SP5">§5</a>.</p>
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<p class="inwebparagraph"><a id="SP5_1_1"></a><b>§5.1.1. </b><code class="display">
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<<span class="cwebmacrodefn">Issue a fallback problem message, since the schema-maker evidently didn't</span> <span class="cwebmacronumber">5.1.1</span>> =
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</code></p>
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<pre class="displaydefn">
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<span class="identifier">LOG</span><span class="plain">(</span><span class="string">"Failed on task: $o\</span><span class="plain">n</span><span class="string">"</span><span class="plain">, </span><span class="identifier">pl</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">task</span><span class="plain"> == </span><span class="constant">TEST_ATOM_TASK</span><span class="plain">)</span>
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<span class="identifier">Problems::Issue::sentence_problem</span><span class="plain">(</span><span class="identifier">_p_</span><span class="plain">(</span><span class="identifier">BelievedImpossible</span><span class="plain">),</span>
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<span class="string">"this is not a condition I am able to test"</span><span class="plain">,</span>
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<span class="string">"or at any rate not during play."</span><span class="plain">);</span>
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<span class="reserved">else</span>
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<span class="identifier">Problems::Issue::sentence_problem</span><span class="plain">(</span><span class="identifier">_p_</span><span class="plain">(</span><span class="identifier">PM_CantForceRelation</span><span class="plain">),</span>
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<span class="string">"this is not something I can make true with 'now'"</span><span class="plain">,</span>
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<span class="string">"because it is too vague about the underlying cause which would "</span>
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<span class="string">"need to be arranged."</span><span class="plain">);</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">This code is used in <a href="#SP5_1">§5.1</a>.</p>
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<p class="inwebparagraph"><a id="SP5_1_2"></a><b>§5.1.2. </b>This is in the user's own best interest.
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</p>
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<p class="macrodefinition"><code class="display">
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<<span class="cwebmacrodefn">Reject all discussion of the action variables in the past tense</span> <span class="cwebmacronumber">5.1.2</span>> =
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</code></p>
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<pre class="displaydefn">
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">asch</span><span class="element">.involves_action_variables</span><span class="plain">) &&</span>
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<span class="plain">(</span><span class="functiontext">Frames::used_for_past_tense</span><span class="plain">()) &&</span>
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<span class="plain">(</span><span class="identifier">suppress_C14ActionVarsPastTense</span><span class="plain"> == </span><span class="identifier">FALSE</span><span class="plain">)) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">problem_count</span><span class="plain"> == 0)</span>
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<span class="identifier">Problems::Issue::sentence_problem</span><span class="plain">(</span><span class="identifier">_p_</span><span class="plain">(</span><span class="identifier">PM_ActionVarsPastTense</span><span class="plain">),</span>
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<span class="string">"it is misleading to talk about the noun, the second noun "</span>
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<span class="string">"or the person asked to do something in past tenses"</span><span class="plain">,</span>
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<span class="string">"because in the past, those were different things and "</span>
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<span class="string">"people, or may have been nothing at all. Writing "</span>
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<span class="string">"'if the noun has been unlocked' tends not to do what we "</span>
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<span class="string">"might hope because the value of 'noun' changes every turn. "</span>
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<span class="string">"So such conditions are not allowed, although to get around "</span>
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<span class="string">"this we can instead write 'if we have unlocked the noun', "</span>
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<span class="string">"which uses a special mechanism to remember everything which "</span>
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<span class="string">"has happened to every object."</span><span class="plain">);</span>
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<span class="reserved">return</span><span class="plain">;</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">This code is used in <a href="#SP5_1">§5.1</a>.</p>
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<p class="inwebparagraph"><a id="SP5_2"></a><b>§5.2. Stage 2. </b>A valid I6 condition has to be bracketed, so we surround the output with
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brackets if testing; and a valid I6 statement has to end with a semicolon,
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so we terminate with that if making true or false.
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</p>
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<p class="macrodefinition"><code class="display">
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<<span class="cwebmacrodefn">Stage 2: expand that schema to the output stream</span> <span class="cwebmacronumber">5.2</span>> =
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</code></p>
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<pre class="displaydefn">
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">asch</span><span class="element">.negate_schema</span><span class="plain">) {</span>
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<span class="identifier">Produce::inv_primitive</span><span class="plain">(</span><span class="functiontext">Emit::tree</span><span class="plain">(), </span><span class="identifier">NOT_BIP</span><span class="plain">);</span>
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<span class="identifier">Produce::down</span><span class="plain">(</span><span class="functiontext">Emit::tree</span><span class="plain">());</span>
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<span class="plain">}</span>
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<span class="functiontext">Calculus::Schemas::emit_expand_from_terms</span><span class="plain">(</span><span class="identifier">asch</span><span class="element">.schema</span><span class="plain">, &(</span><span class="identifier">asch</span><span class="element">.pt0</span><span class="plain">), &(</span><span class="identifier">asch</span><span class="element">.pt1</span><span class="plain">), </span><span class="identifier">with_semicolon</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">asch</span><span class="element">.negate_schema</span><span class="plain">) {</span>
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<span class="identifier">Produce::up</span><span class="plain">(</span><span class="functiontext">Emit::tree</span><span class="plain">());</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">This code is used in <a href="#SP5">§5</a>.</p>
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<p class="inwebparagraph"><a id="SP6"></a><b>§6. Constructing the schema. </b></p>
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<pre class="display">
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<span class="reserved">annotated_i6_schema</span><span class="plain"> </span><span class="functiontext">Calculus::Atoms::Compile::i6_schema_of_atom</span><span class="plain">(</span><span class="reserved">i6_schema</span><span class="plain"> *</span><span class="identifier">sch</span><span class="plain">, </span><span class="reserved">pcalc_prop</span><span class="plain"> *</span><span class="identifier">pl</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">task</span><span class="plain">) {</span>
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<span class="reserved">annotated_i6_schema</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
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<span class="functiontext">Calculus::Schemas::modify</span><span class="plain">(</span><span class="identifier">sch</span><span class="plain">, </span><span class="string">" "</span><span class="plain">); </span> <span class="comment">a non-NULL return in case problems occur</span>
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<span class="identifier">asch</span><span class="element">.schema</span><span class="plain"> = </span><span class="identifier">sch</span><span class="plain">;</span>
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<span class="identifier">asch</span><span class="element">.negate_schema</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
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<span class="identifier">asch</span><span class="element">.pt0</span><span class="plain"> = </span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>terms</span><span class="plain">[0]; </span><span class="identifier">asch</span><span class="element">.pt1</span><span class="plain"> = </span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>terms</span><span class="plain">[1];</span>
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<span class="identifier">asch</span><span class="element">.involves_action_variables</span><span class="plain"> = </span><span class="functiontext">Calculus::Atoms::Compile::atom_involves_action_variables</span><span class="plain">(</span><span class="identifier">pl</span><span class="plain">);</span>
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<span class="reserved">switch</span><span class="plain">(</span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>element</span><span class="plain">) {</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="constant">CALLED_ATOM</span><span class="plain">: </span><<span class="cwebmacro">Make an annotated schema for a CALLED atom</span> <span class="cwebmacronumber">6.1</span>><span class="plain">;</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="constant">KIND_ATOM</span><span class="plain">: </span><<span class="cwebmacro">Make an annotated schema for a KIND atom</span> <span class="cwebmacronumber">6.2</span>><span class="plain">;</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="constant">EVERYWHERE_ATOM</span><span class="plain">: </span><<span class="cwebmacro">Make an annotated schema for an EVERYWHERE atom</span> <span class="cwebmacronumber">6.3</span>><span class="plain">;</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="constant">NOWHERE_ATOM</span><span class="plain">: </span><<span class="cwebmacro">Make an annotated schema for a NOWHERE atom</span> <span class="cwebmacronumber">6.4</span>><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">HERE_ATOM</span><span class="plain">: </span><<span class="cwebmacro">Make an annotated schema for a HERE atom</span> <span class="cwebmacronumber">6.5</span>><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">PREDICATE_ATOM</span><span class="plain">:</span>
|
|
<span class="reserved">switch</span><span class="plain">(</span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>arity</span><span class="plain">) {</span>
|
|
<span class="reserved">case</span><span class="plain"> 1: </span><<span class="cwebmacro">Make an annotated schema for a unary predicate</span> <span class="cwebmacronumber">6.6</span>><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> 2: </span><<span class="cwebmacro">Make an annotated schema for a binary predicate</span> <span class="cwebmacronumber">6.7</span>><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="plain">}</span>
|
|
|
|
<span class="identifier">asch</span><span class="element">.schema</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">; </span> <span class="comment">signal that the atom cannot be compiled simply</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">The function Calculus::Atoms::Compile::i6_schema_of_atom is used in <a href="#SP5_1">§5.1</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP6_1"></a><b>§6.1. </b>We are now able to look at the different types of atom one at a time.
|
|
</p>
|
|
|
|
<p class="inwebparagraph">CALLED atoms cannot be asserted, and to test them, we simply copy the
|
|
value into the local variable of the given name. Note then that here
|
|
the I6 <code class="display"><span class="extract">=</span></code> (set equal) operator is being used in a condition context:
|
|
there's a good chance that the value set is non-zero (since all objects
|
|
and enumerated values are non-zero), but it isn't necessarily so —
|
|
in Inform it's legal to quantify over times and truth states, for
|
|
instance, where 0 is a legal I6 value. So we use the comma operator
|
|
to throw away the result of the assignment, and evaluate the condition
|
|
to <code class="display"><span class="extract">true</span></code>.
|
|
</p>
|
|
|
|
|
|
<p class="macrodefinition"><code class="display">
|
|
<<span class="cwebmacrodefn">Make an annotated schema for a CALLED atom</span> <span class="cwebmacronumber">6.1</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">switch</span><span class="plain">(</span><span class="identifier">task</span><span class="plain">) {</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">TEST_ATOM_TASK</span><span class="plain">: {</span>
|
|
<span class="identifier">wording</span><span class="plain"> </span><span class="identifier">W</span><span class="plain"> = </span><span class="functiontext">Calculus::Atoms::CALLED_get_name</span><span class="plain">(</span><span class="identifier">pl</span><span class="plain">);</span>
|
|
<span class="functiontext">Calculus::Schemas::modify</span><span class="plain">(</span><span class="identifier">sch</span><span class="plain">, </span><span class="string">"(%L=(*1), true)"</span><span class="plain">,</span>
|
|
<span class="functiontext">LocalVariables::ensure_called_local</span><span class="plain">(</span><span class="identifier">W</span><span class="plain">, </span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>assert_kind</span><span class="plain">));</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">default</span><span class="plain">: </span><span class="identifier">asch</span><span class="element">.schema</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">; </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP6">§6</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP6_2"></a><b>§6.2. </b>In any type-checked proposition, a <code class="display"><span class="extract">KIND</span></code> atom can only exist where it is
|
|
always at least sometimes true. In particular, if K is a kind of value, then
|
|
the atom K(v) can only exist where v is of that kind of value, so that the
|
|
atom is always true when tested. But if K is a kind of object, then K(O)
|
|
may occur in the proposition for any object O, where O need not belong
|
|
to K at all: so there is something substantive to check, which we do using
|
|
the I6 <code class="display"><span class="extract">ofclass</span></code> operator.
|
|
</p>
|
|
|
|
|
|
<p class="macrodefinition"><code class="display">
|
|
<<span class="cwebmacrodefn">Make an annotated schema for a KIND atom</span> <span class="cwebmacronumber">6.2</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">switch</span><span class="plain">(</span><span class="identifier">task</span><span class="plain">) {</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">TEST_ATOM_TASK</span><span class="plain">:</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Kinds::Compare::lt</span><span class="plain">(</span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>assert_kind</span><span class="plain">, </span><span class="identifier">K_object</span><span class="plain">))</span>
|
|
<span class="functiontext">Calculus::Schemas::modify</span><span class="plain">(</span><span class="identifier">sch</span><span class="plain">, </span><span class="string">"*1 ofclass %n"</span><span class="plain">,</span>
|
|
<span class="functiontext">Kinds::RunTime::I6_classname</span><span class="plain">(</span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>assert_kind</span><span class="plain">));</span>
|
|
<span class="reserved">else</span><span class="plain"> {</span>
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">Kinds::get_construct</span><span class="plain">(</span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>assert_kind</span><span class="plain">) == </span><span class="identifier">CON_list_of</span><span class="plain">) && (</span><span class="identifier">problem_count</span><span class="plain"> == 0)) {</span>
|
|
<span class="identifier">Problems::quote_source</span><span class="plain">(1, </span><span class="identifier">current_sentence</span><span class="plain">);</span>
|
|
<span class="functiontext">Problems::quote_kind</span><span class="plain">(2, </span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>assert_kind</span><span class="plain">);</span>
|
|
<span class="identifier">Problems::Issue::handmade_problem</span><span class="plain">(</span><span class="identifier">_p_</span><span class="plain">(</span><span class="identifier">PM_CantCheckListContents</span><span class="plain">));</span>
|
|
<span class="identifier">Problems::issue_problem_segment</span><span class="plain">(</span>
|
|
<span class="string">"In %1, you use a list which might or might not match a "</span>
|
|
<span class="string">"definition requiring %2. But there's no efficient way to "</span>
|
|
<span class="string">"tell during play whether the list actually contains that, "</span>
|
|
<span class="string">"without laboriously checking every entry. Because "</span>
|
|
<span class="string">"in general this would be a bad idea, this usage is "</span>
|
|
<span class="string">"not allowed."</span><span class="plain">);</span>
|
|
<span class="identifier">Problems::issue_problem_end</span><span class="plain">();</span>
|
|
<span class="plain">}</span>
|
|
<span class="functiontext">Calculus::Schemas::modify</span><span class="plain">(</span><span class="identifier">sch</span><span class="plain">, </span><span class="string">"true"</span><span class="plain">);</span>
|
|
<span class="plain">}</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">NOW_ATOM_TRUE_TASK</span><span class="plain">:</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">NOW_ATOM_FALSE_TASK</span><span class="plain">:</span>
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">suppress_C14CantChangeKind</span><span class="plain"> == </span><span class="identifier">FALSE</span><span class="plain">) {</span>
|
|
<span class="identifier">Problems::Issue::sentence_problem</span><span class="plain">(</span><span class="identifier">_p_</span><span class="plain">(</span><span class="identifier">PM_CantChangeKind</span><span class="plain">),</span>
|
|
<span class="string">"the kind of something is fixed"</span><span class="plain">,</span>
|
|
<span class="string">"and cannot be changed during play with a 'now'."</span><span class="plain">);</span>
|
|
<span class="identifier">asch</span><span class="element">.schema</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
|
|
<span class="plain">} </span><span class="reserved">else</span><span class="plain"> </span><span class="functiontext">Calculus::Schemas::modify</span><span class="plain">(</span><span class="identifier">sch</span><span class="plain">, </span><span class="string">" "</span><span class="plain">);</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP6">§6</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP6_3"></a><b>§6.3. </b>An easy case. Note that <code class="display"><span class="extract">FoundEverywhere</span></code> is a template routine existing
|
|
to provide a common value of the I6 <code class="display"><span class="extract">found_in</span></code> property — common that is
|
|
to all backdrops which are currently everywhere.
|
|
</p>
|
|
|
|
|
|
<p class="macrodefinition"><code class="display">
|
|
<<span class="cwebmacrodefn">Make an annotated schema for an EVERYWHERE atom</span> <span class="cwebmacronumber">6.3</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">switch</span><span class="plain">(</span><span class="identifier">task</span><span class="plain">) {</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">TEST_ATOM_TASK</span><span class="plain">:</span>
|
|
<span class="functiontext">Calculus::Schemas::modify</span><span class="plain">(</span><span class="identifier">sch</span><span class="plain">, </span><span class="string">"BackdropEverywhere(*1)"</span><span class="plain">);</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">NOW_ATOM_TRUE_TASK</span><span class="plain">:</span>
|
|
<span class="functiontext">Calculus::Schemas::modify</span><span class="plain">(</span><span class="identifier">sch</span><span class="plain">, </span><span class="string">"MoveObject(*1, FoundEverywhere); MoveFloatingObjects();"</span><span class="plain">);</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">NOW_ATOM_FALSE_TASK</span><span class="plain">:</span>
|
|
<span class="identifier">Problems::Issue::sentence_problem</span><span class="plain">(</span><span class="identifier">_p_</span><span class="plain">(</span><span class="identifier">PM_CantChangeEverywhere</span><span class="plain">),</span>
|
|
<span class="string">"not being 'everywhere' is not something which can be changed "</span>
|
|
<span class="string">"during play using 'now'"</span><span class="plain">,</span>
|
|
<span class="string">"because it's not exact enough about what needs to be done."</span><span class="plain">);</span>
|
|
<span class="identifier">asch</span><span class="element">.schema</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">; </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP6">§6</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP6_4"></a><b>§6.4. </b>And another.
|
|
</p>
|
|
|
|
|
|
<p class="macrodefinition"><code class="display">
|
|
<<span class="cwebmacrodefn">Make an annotated schema for a NOWHERE atom</span> <span class="cwebmacronumber">6.4</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">switch</span><span class="plain">(</span><span class="identifier">task</span><span class="plain">) {</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">TEST_ATOM_TASK</span><span class="plain">:</span>
|
|
<span class="functiontext">Calculus::Schemas::modify</span><span class="plain">(</span><span class="identifier">sch</span><span class="plain">, </span><span class="string">"LocationOf(*1) == nothing"</span><span class="plain">);</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">NOW_ATOM_TRUE_TASK</span><span class="plain">:</span>
|
|
<span class="functiontext">Calculus::Schemas::modify</span><span class="plain">(</span><span class="identifier">sch</span><span class="plain">, </span><span class="string">"RemoveFromPlay(*1);"</span><span class="plain">);</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">NOW_ATOM_FALSE_TASK</span><span class="plain">:</span>
|
|
<span class="functiontext">Calculus::Schemas::modify</span><span class="plain">(</span><span class="identifier">sch</span><span class="plain">, </span><span class="string">"MoveObject(*1, real_location, 1, false);"</span><span class="plain">);</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP6">§6</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP6_5"></a><b>§6.5. </b>And another. (In fact, at present <code class="display"><span class="extract">HERE</span></code> atoms are never included in
|
|
propositions to be compiled, so this code is never used.)
|
|
</p>
|
|
|
|
|
|
<p class="macrodefinition"><code class="display">
|
|
<<span class="cwebmacrodefn">Make an annotated schema for a HERE atom</span> <span class="cwebmacronumber">6.5</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">switch</span><span class="plain">(</span><span class="identifier">task</span><span class="plain">) {</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">TEST_ATOM_TASK</span><span class="plain">:</span>
|
|
<span class="functiontext">Calculus::Schemas::modify</span><span class="plain">(</span><span class="identifier">sch</span><span class="plain">, </span><span class="string">"LocationOf(*1) == location"</span><span class="plain">);</span>
|
|
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">NOW_ATOM_TRUE_TASK</span><span class="plain">:</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">NOW_ATOM_FALSE_TASK</span><span class="plain">:</span>
|
|
<span class="identifier">Problems::Issue::sentence_problem</span><span class="plain">(</span><span class="identifier">_p_</span><span class="plain">(</span><span class="identifier">BelievedImpossible</span><span class="plain">),</span>
|
|
<span class="string">"being 'here' is not something which can be changed during play"</span><span class="plain">,</span>
|
|
<span class="string">"so it cannot be brought about or cancelled out with 'now'."</span><span class="plain">);</span>
|
|
<span class="identifier">asch</span><span class="element">.schema</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">; </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
</pre>
|
|
|
|
<p class="inwebparagraph"></p>
|
|
|
|
<p class="endnote">This code is used in <a href="#SP6">§6</a>.</p>
|
|
|
|
<p class="inwebparagraph"><a id="SP6_6"></a><b>§6.6. </b>The last unary atom is an adjective, for which we hand over to the general
|
|
adjective apparatus.
|
|
</p>
|
|
|
|
|
|
<p class="macrodefinition"><code class="display">
|
|
<<span class="cwebmacrodefn">Make an annotated schema for a unary predicate</span> <span class="cwebmacronumber">6.6</span>> =
|
|
</code></p>
|
|
|
|
|
|
<pre class="displaydefn">
|
|
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">atask</span><span class="plain"> = 0; </span> <span class="comment">redundant assignment to appease <code class="display"><span class="extract">gcc -O2</span></code></span>
|
|
<span class="identifier">adjective_usage</span><span class="plain"> *</span><span class="identifier">tr</span><span class="plain"> = </span><span class="identifier">RETRIEVE_POINTER_adjective_usage</span><span class="plain">(</span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>predicate</span><span class="plain">);</span>
|
|
<span class="identifier">adjectival_phrase</span><span class="plain"> *</span><span class="identifier">aph</span><span class="plain"> = </span><span class="identifier">AdjectiveUsages::get_aph</span><span class="plain">(</span><span class="identifier">tr</span><span class="plain">);</span>
|
|
|
|
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">AdjectiveUsages::get_parity</span><span class="plain">(</span><span class="identifier">tr</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">) </span><span class="identifier">asch</span><span class="element">.negate_schema</span><span class="plain"> = </span><span class="identifier">TRUE</span><span class="plain">;</span>
|
|
|
|
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>terms</span><span class="plain">[0]</span><span class="element">.constant</span><span class="plain">) && (</span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>terms</span><span class="plain">[0]</span><span class="element">.term_checked_as_kind</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">))</span>
|
|
<span class="identifier">pl</span><span class="plain">-</span><span class="element">>terms</span><span class="plain">[0]</span><span class="element">.term_checked_as_kind</span><span class="plain"> = </span><span class="functiontext">Specifications::to_kind</span><span class="plain">(</span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>terms</span><span class="plain">[0]</span><span class="element">.constant</span><span class="plain">);</span>
|
|
|
|
<span class="reserved">switch</span><span class="plain">(</span><span class="identifier">task</span><span class="plain">) {</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">TEST_ATOM_TASK</span><span class="plain">: </span><span class="identifier">atask</span><span class="plain"> = </span><span class="constant">TEST_ADJECTIVE_TASK</span><span class="plain">; </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">NOW_ATOM_TRUE_TASK</span><span class="plain">: </span><span class="identifier">atask</span><span class="plain"> = </span><span class="constant">NOW_ADJECTIVE_TRUE_TASK</span><span class="plain">; </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="reserved">case</span><span class="plain"> </span><span class="constant">NOW_ATOM_FALSE_TASK</span><span class="plain">: </span><span class="identifier">atask</span><span class="plain"> = </span><span class="constant">NOW_ADJECTIVE_FALSE_TASK</span><span class="plain">; </span><span class="reserved">break</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
|
|
|
<span class="identifier">LOGIF</span><span class="plain">(</span><span class="identifier">PREDICATE_CALCULUS_WORKINGS</span><span class="plain">, </span><span class="string">"Unary predicate: $o, on: $u\</span><span class="plain">n</span><span class="string">"</span><span class="plain">, </span><span class="identifier">pl</span><span class="plain">, </span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>terms</span><span class="plain">[0]</span><span class="element">.term_checked_as_kind</span><span class="plain">);</span>
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<span class="identifier">asch</span><span class="element">.schema</span><span class="plain"> = </span><span class="functiontext">Adjectives::Meanings::get_i6_schema</span><span class="plain">(</span><span class="identifier">aph</span><span class="plain">, </span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>terms</span><span class="plain">[0]</span><span class="element">.term_checked_as_kind</span><span class="plain">, </span><span class="identifier">atask</span><span class="plain">);</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">This code is used in <a href="#SP6">§6</a>.</p>
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<p class="inwebparagraph"><a id="SP6_7"></a><b>§6.7. </b>Delegation is similarly the art of compiling a BP:
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</p>
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<p class="macrodefinition"><code class="display">
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<<span class="cwebmacrodefn">Make an annotated schema for a binary predicate</span> <span class="cwebmacronumber">6.7</span>> =
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</code></p>
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<pre class="displaydefn">
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<span class="reserved">binary_predicate</span><span class="plain"> *</span><span class="identifier">bp</span><span class="plain"> = </span><span class="identifier">RETRIEVE_POINTER_binary_predicate</span><span class="plain">(</span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>predicate</span><span class="plain">);</span>
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<span class="reserved">binary_predicate</span><span class="plain"> *</span><span class="identifier">bp_to_assert</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
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<<span class="cwebmacro">Undo any functional simplification of the relation</span> <span class="cwebmacronumber">6.7.1</span>><span class="plain">;</span>
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<span class="identifier">asch</span><span class="element">.schema</span><span class="plain"> = </span><span class="functiontext">BinaryPredicates::get_i6_schema</span><span class="plain">(</span><span class="identifier">task</span><span class="plain">, </span><span class="identifier">bp_to_assert</span><span class="plain">, &</span><span class="identifier">asch</span><span class="plain">);</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">This code is used in <a href="#SP6">§6</a>.</p>
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<p class="inwebparagraph"><a id="SP6_7_1"></a><b>§6.7.1. </b>When a relation R(x, y) has been simplified to is(x, f_R(y))
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or is(g_R(x), y), it can be tested but not asserted true or false;
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we have to re-establish R(x, y) before we can proceed.
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</p>
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<p class="macrodefinition"><code class="display">
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<<span class="cwebmacrodefn">Undo any functional simplification of the relation</span> <span class="cwebmacronumber">6.7.1</span>> =
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</code></p>
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<pre class="displaydefn">
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">task</span><span class="plain"> != </span><span class="constant">TEST_ATOM_TASK</span><span class="plain">) && (</span><span class="identifier">bp</span><span class="plain"> == </span><span class="identifier">R_equality</span><span class="plain">)) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>terms</span><span class="plain">[0]</span><span class="element">.function</span><span class="plain">) {</span>
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<span class="identifier">bp_to_assert</span><span class="plain"> = </span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>terms</span><span class="plain">[0]</span><span class="element">.function</span><span class="plain">-</span><span class="element">>bp</span><span class="plain">;</span>
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<span class="identifier">asch</span><span class="element">.pt0</span><span class="plain"> = </span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>terms</span><span class="plain">[0]</span><span class="element">.function</span><span class="plain">-</span><span class="element">>fn_of</span><span class="plain">;</span>
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<span class="plain">} </span><span class="reserved">else</span><span class="plain"> </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>terms</span><span class="plain">[1]</span><span class="element">.function</span><span class="plain">) {</span>
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<span class="identifier">bp_to_assert</span><span class="plain"> = </span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>terms</span><span class="plain">[1]</span><span class="element">.function</span><span class="plain">-</span><span class="element">>bp</span><span class="plain">;</span>
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<span class="identifier">asch</span><span class="element">.pt1</span><span class="plain"> = </span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>terms</span><span class="plain">[1]</span><span class="element">.function</span><span class="plain">-</span><span class="element">>fn_of</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">bp_to_assert</span><span class="plain"> == </span><span class="identifier">R_equality</span><span class="plain">)</span>
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<span class="identifier">internal_error</span><span class="plain">(</span><span class="string">"contraction of predicate applied to equality"</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">bp_to_assert</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="identifier">bp_to_assert</span><span class="plain"> = </span><span class="identifier">bp</span><span class="plain">;</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">This code is used in <a href="#SP6_7">§6.7</a>.</p>
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<p class="inwebparagraph"><a id="SP7"></a><b>§7. </b></p>
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<pre class="display">
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">Calculus::Atoms::Compile::atom_involves_action_variables</span><span class="plain">(</span><span class="reserved">pcalc_prop</span><span class="plain"> *</span><span class="identifier">pl</span><span class="plain">) {</span>
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<span class="plain">#</span><span class="identifier">ifdef</span><span class="plain"> </span><span class="identifier">IF_MODULE</span>
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<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain"><</span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>arity</span><span class="plain">; </span><span class="identifier">i</span><span class="plain">++) {</span>
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<span class="identifier">parse_node</span><span class="plain"> *</span><span class="identifier">operand</span><span class="plain"> = </span><span class="functiontext">Calculus::Terms::constant_underlying</span><span class="plain">(&(</span><span class="identifier">pl</span><span class="plain">-</span><span class="element">>terms</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]));</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">PL::Actions::Patterns::is_an_action_variable</span><span class="plain">(</span><span class="identifier">operand</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="plain">#</span><span class="identifier">endif</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
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|
<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function Calculus::Atoms::Compile::atom_involves_action_variables is used in <a href="#SP6">§6</a>.</p>
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<p class="inwebparagraph"><a id="SP8"></a><b>§8. An unannotated one. </b></p>
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<pre class="display">
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<span class="reserved">annotated_i6_schema</span><span class="plain"> </span><span class="functiontext">Calculus::Atoms::Compile::blank_asch</span><span class="plain">(</span><span class="reserved">void</span><span class="plain">) {</span>
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<span class="reserved">annotated_i6_schema</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
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<span class="identifier">asch</span><span class="element">.schema</span><span class="plain"> = </span><span class="functiontext">Calculus::Schemas::new</span><span class="plain">(</span><span class="string">" "</span><span class="plain">);</span>
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<span class="identifier">asch</span><span class="element">.negate_schema</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
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<span class="identifier">asch</span><span class="element">.pt0</span><span class="plain"> = </span><span class="functiontext">Calculus::Terms::new_variable</span><span class="plain">(0);</span>
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<span class="identifier">asch</span><span class="element">.pt1</span><span class="plain"> = </span><span class="functiontext">Calculus::Terms::new_variable</span><span class="plain">(0);</span>
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<span class="identifier">asch</span><span class="element">.involves_action_variables</span><span class="plain"> = </span><span class="identifier">FALSE</span><span class="plain">;</span>
|
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">asch</span><span class="plain">;</span>
|
|
<span class="plain">}</span>
|
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function Calculus::Atoms::Compile::blank_asch is used in 6/rlt (<a href="6-rlt.html#SP15_2_2">§15.2.2</a>, <a href="6-rlt.html#SP15_2_3">§15.2.3</a>, <a href="6-rlt.html#SP15_2_4">§15.2.4</a>).</p>
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