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<!--Weave of 'Parse Clauses' generated by Inweb-->
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<div class="breadcrumbs">
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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../inform7n.html">Inform7</a></li><li><a href="index.html">if</a></li><li><a href="index.html#4">Chapter 4: Actions</a></li><li><b>Parse Clauses</b></li></ul></div>
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<p class="purpose">Parsing the clauses part of an AP from source text.</p>
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<ul class="toc"><li><a href="4-pc.html#SP2">§2. Internal test</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. </b>For nearly two decades the function below (and its allied code in
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<a href="4-anl.html" class="internal">Action Name Lists</a>) was the most troublesome, and hardest to understand,
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code in the whole compiler, a simply awful place reminding me somehow of
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Douglas Adams's Frogstar.<sup id="fnref:1"><a href="#fn:1" rel="footnote">1</a></sup> The AP parser was almost as cranky as the
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type-checker, but that at least had the excuse of performing a complicated
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function. Periodic improvements clarified only that the action pattern parser
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was difficult to predict, and still did odd things in edge cases.
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</p>
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<p class="commentary">A therapeutic rewrite was finally made in March 2021; the algorithm works
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entirely differently but appears to match a superset of cases that the old one
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did, and is much easier to specify.
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</p>
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<ul class="footnotetexts"><li class="footnote" id="fn:1"><p class="inwebfootnote"><sup id="fnref:1"><a href="#fn:1" rel="footnote">1</a></sup> Information about package holidays on the Frogstar can be found in the leaflet
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"Sun, Sand, and Suffering on the Most Totally Evil Place in the Galaxy".
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<a href="#fnref:1" title="return to text"> ↩</a></p></li></ul>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="function-syntax">ParseClauses::ap_seven</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">ParseClauses::ap_seven</span></span>:<br/><a href="4-pc.html#SP3">§3</a><br/>Parse Action Patterns - <a href="4-pap.html#SP16">§16</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">W</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">ACTION_PATTERN_PARSING</span><span class="plain-syntax">, </span><span class="string-syntax">"Level Seven on: %W\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">W</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">action_name_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">list</span><span class="plain-syntax"> =</span>
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<span class="plain-syntax"> </span><a href="4-anl.html#SP28" class="function-link"><span class="function-syntax">ActionNameLists::parse</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">, </span><a href="4-pap.html#SP4" class="function-link"><span class="function-syntax">ParseActionPatterns::current_tense</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">ACTION_PATTERN_PARSING</span><span class="plain-syntax">, </span><span class="string-syntax">"Action name list for %W is:\n$L"</span><span class="plain-syntax">, </span><span class="identifier-syntax">W</span><span class="plain-syntax">, </span><span class="identifier-syntax">list</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-anl.html#SP9" class="function-link"><span class="function-syntax">ActionNameLists::length</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">list</span><span class="plain-syntax">) == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-pc.html#SP1_1" class="named-paragraph-link"><span class="named-paragraph">Reduce the list to the first viable entry at each word position</span><span class="named-paragraph-number">1.1</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">ACTION_PATTERN_PARSING</span><span class="plain-syntax">, </span><span class="string-syntax">"Reduced to viability:\n$L"</span><span class="plain-syntax">, </span><span class="identifier-syntax">list</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-pc.html#SP1_2" class="named-paragraph-link"><span class="named-paragraph">Reject the resulting list if two or more entries contain clauses</span><span class="named-paragraph-number">1.2</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-pc.html#SP1_3" class="named-paragraph-link"><span class="named-paragraph">Reject the resulting list if, given the clauses, two actions are immiscible</span><span class="named-paragraph-number">1.3</span></a></span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-pc.html#SP1_4" class="named-paragraph-link"><span class="named-paragraph">Produce and return an action pattern from what survives of the list</span><span class="named-paragraph-number">1.4</span></a></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="SP1_1" class="paragraph-anchor"></a><b>§1.1. </b>A typical action list might look like the following, which came from the text
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"looking or taking inventory in the presence of Hans in the Laboratory". There
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are six different options at word position 2 (i.e., the "taking" part) but only
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one at position 0 ("looking").
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax">(1). +2 taking inventory [in: the laboratory] [in-presence: hans]</span>
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<span class="plain-syntax">(2). +2 taking inventory [in-presence: hans in the laboratory]</span>
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<span class="plain-syntax">(3). +2 taking [noun: inventory] [in: the laboratory] [in-presence: hans]</span>
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<span class="plain-syntax">(4). +2 taking [noun: inventory] [in-presence: hans in the laboratory]</span>
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<span class="plain-syntax">(5). +2 taking [noun: inventory in the presence of hans] [in: the laboratory]</span>
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<span class="plain-syntax">(6). +2 taking [noun: inventory in the presence of hans in the laboratory]</span>
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<span class="plain-syntax">(7). +0 looking</span>
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</pre>
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<p class="commentary">Note that it is ordered in such a way that actions with more fixed wording
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occur before actions with fewer (at the same word position); and also that
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the number of words inside the clauses increases as we go through possibilities
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for each action. For (3) to (7), the "taking" options, the clause wording
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runs to successively 4, 5, 8 and 9 words.
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</p>
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<p class="commentary">We now need to reduce this to a list of just two entries:
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax">(1). +2 taking inventory [in: the laboratory] [in-presence: hans]</span>
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<span class="plain-syntax">(2). +0 looking</span>
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</pre>
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<p class="commentary">An entry is "viable" if we can make sense of the text in all of its clauses.
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As soon as we find a viable entry at a given word position, we ignore all
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subsequent possibilities at that position — so the ordering of the ANL is
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crucial: options near the top of the list are preferred to those lower down.
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</p>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Reduce the list to the first viable entry at each word position</span><span class="named-paragraph-number">1.1</span></span><span class="comment-syntax"> =</span>
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="reserved-syntax">anl_entry</span><span class="plain-syntax"> *</span><span class="identifier-syntax">viable</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">; </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> = -1;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_ANL</span><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">, </span><span class="identifier-syntax">list</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-anl.html#SP21" class="function-link"><span class="function-syntax">ActionNameLists::word_position</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">) != </span><span class="identifier-syntax">at</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">at</span><span class="plain-syntax"> >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">viable</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>
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<span class="plain-syntax"> </span><span class="identifier-syntax">at</span><span class="plain-syntax"> = </span><a href="4-anl.html#SP21" class="function-link"><span class="function-syntax">ActionNameLists::word_position</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">viable</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">viable</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><a href="4-anl.html#SP5" class="function-link"><span class="function-syntax">ActionNameLists::mark_for_deletion</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">action_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">an</span><span class="plain-syntax"> = </span><a href="4-anl.html#SP12" class="function-link"><span class="function-syntax">ActionNameLists::action</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">fail</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">entry_options</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="named-paragraph-container code-font"><a href="4-pc.html#SP1_1_1" class="named-paragraph-link"><span class="named-paragraph">Parse the clauses</span><span class="named-paragraph-number">1.1.1</span></a></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">fail</span><span class="plain-syntax">) { </span><a href="4-anl.html#SP5" class="function-link"><span class="function-syntax">ActionNameLists::mark_for_deletion</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">); </span><span class="reserved-syntax">continue</span><span class="plain-syntax">; }</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">PluginCalls::act_on_ANL_entry_options</span><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">, </span><span class="identifier-syntax">entry_options</span><span class="plain-syntax">, &</span><span class="identifier-syntax">fail</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">fail</span><span class="plain-syntax">) { </span><a href="4-anl.html#SP5" class="function-link"><span class="function-syntax">ActionNameLists::mark_for_deletion</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">); </span><span class="reserved-syntax">continue</span><span class="plain-syntax">; }</span>
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<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-pc.html#SP1_1_3" class="named-paragraph-link"><span class="named-paragraph">Typecheck or otherwise validate the clauses</span><span class="named-paragraph-number">1.1.3</span></a></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">fail</span><span class="plain-syntax">) { </span><a href="4-anl.html#SP5" class="function-link"><span class="function-syntax">ActionNameLists::mark_for_deletion</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">); </span><span class="reserved-syntax">continue</span><span class="plain-syntax">; }</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">viable</span><span class="plain-syntax"> = </span><span class="identifier-syntax">entry</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">viable</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>
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<span class="plain-syntax"> </span><a href="4-anl.html#SP6" class="function-link"><span class="function-syntax">ActionNameLists::remove_entries_marked_for_deletion</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">list</span><span class="plain-syntax">);</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="4-pc.html#SP1">§1</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP1_1_1" class="paragraph-anchor"></a><b>§1.1.1. </b>Now each clause's text must be evaluated: for example, on the clause
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<span class="extract"><span class="extract-syntax">[in-presence: hans]</span></span> we will have to evaluate "Hans".
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</p>
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<p class="commentary">Note the special case for actions whose second noun has the kind <span class="extract"><span class="extract-syntax">K_understanding</span></span>,
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meaning that they hold topics of conversation ("ask Hans about cosmic rays").
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There is ordinarily no way in Inform to write a literal of this kind, but here
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we are allowed to write a text literal instead, and it is automatically converted.
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</p>
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<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Parse the clauses</span><span class="named-paragraph-number">1.1.1</span></span><span class="comment-syntax"> =</span>
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">saved_pap</span><span class="plain-syntax"> = </span><span class="identifier-syntax">pap_failure_reason</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_ANL_CLAUSES</span><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">, </span><span class="identifier-syntax">entry</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">fail</span><span class="plain-syntax">) </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_INDENT</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">Log::aspect_switched_on</span><span class="plain-syntax">(</span><span class="constant-syntax">ACTION_PATTERN_PARSING_DA</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"parsing "</span><span class="plain-syntax">); </span><a href="4-anl.html#SP26" class="function-link"><span class="function-syntax">ActionNameLists::log_clause</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">); </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">" - "</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Wordings::nonempty</span><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">clause_text</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">opts</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">PluginCalls::parse_AP_clause</span><span class="plain-syntax">(</span><span class="identifier-syntax">an</span><span class="plain-syntax">, </span><span class="identifier-syntax">c</span><span class="plain-syntax">, &</span><span class="identifier-syntax">opts</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">opts</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">entry_options</span><span class="plain-syntax"> |= </span><span class="identifier-syntax">opts</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">clause_ID</span><span class="plain-syntax"> == </span><span class="constant-syntax">SECOND_AP_CLAUSE</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">an</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">K_understanding</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">Kinds::eq</span><span class="plain-syntax">(</span><a href="4-as.html#SP4" class="function-link"><span class="function-syntax">ActionSemantics::kind_of_second</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">an</span><span class="plain-syntax">), </span><span class="identifier-syntax">K_understanding</span><span class="plain-syntax">)) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="function-syntax"><understanding-action-irregular-operand>(c-></span><span class="element-syntax">clause_text</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">val</span><span class="plain-syntax"> = </span><a href="5-pp.html#SP4" class="function-link"><span class="function-syntax">ParsingPlugin::rvalue_from_command_grammar</span></a><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">Node::set_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">val</span><span class="plain-syntax">, </span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">clause_text</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">evaluation</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">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="function-syntax"><action-operand>(c-></span><span class="element-syntax">clause_text</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"><<r>></span><span class="plain-syntax">) </span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">evaluation</span><span class="plain-syntax"> = </span><span class="function-syntax"><<rp>></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">evaluation</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Specifications::from_kind</span><span class="plain-syntax">(</span><span class="identifier-syntax">K_thing</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">fail</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</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">K_understanding</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">Rvalues::is_CONSTANT_of_kind</span><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">evaluation</span><span class="plain-syntax">, </span><span class="identifier-syntax">K_text</span><span class="plain-syntax">)))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Node::set_kind_of_value</span><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">evaluation</span><span class="plain-syntax">, </span><span class="identifier-syntax">K_understanding</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">Log::aspect_switched_on</span><span class="plain-syntax">(</span><span class="constant-syntax">ACTION_PATTERN_PARSING_DA</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">fail</span><span class="plain-syntax">) </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"fail\n"</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">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"$P\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">evaluation</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_OUTDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">pap_failure_reason</span><span class="plain-syntax"> = </span><span class="identifier-syntax">saved_pap</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-pc.html#SP1_1">§1.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP1_1_2" class="paragraph-anchor"></a><b>§1.1.2. </b>The "operands" of an action pattern are the nouns to which it applies: for
|
|
example, in "Kevin taking or dropping something", the operand is "something".
|
|
We treat words like "something" specially to avoid them being read as
|
|
"some thing" and thus forcing the kind of the operand to be "thing".
|
|
</p>
|
|
|
|
<pre class="Preform-displayed-code all-displayed-code code-font">
|
|
<span class="Preform-function-syntax"><action-operand></span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
|
|
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">something/anything</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==></span><span class="Preform-plain-syntax"> { FALSE, - }</span>
|
|
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">something/anything</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">else</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==></span><span class="Preform-plain-syntax"> { FALSE, - }</span>
|
|
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax"><s-ap-parameter></span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==></span><span class="Preform-plain-syntax"> { TRUE, RP[1] }</span>
|
|
|
|
<span class="Preform-function-syntax"><understanding-action-irregular-operand></span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
|
|
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">something/anything</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==></span><span class="Preform-plain-syntax"> { TRUE, - }</span>
|
|
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">it</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==></span><span class="Preform-plain-syntax"> { FALSE, - }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This is <a href="../words-module/4-ap.html" class="internal">Preform grammar</a>, not regular C code.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP1_1_3" class="paragraph-anchor"></a><b>§1.1.3. </b>Supposing that we managed to find values for each clause, we might still
|
|
have impossible ones: "putting 101 on false", say, where the noun seems to
|
|
be the number 101 and the second noun the truth state "false". So we need
|
|
to typecheck each clause.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Typecheck or otherwise validate the clauses</span><span class="named-paragraph-number">1.1.3</span></span><span class="Preform-comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_ANL_CLAUSES</span><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">, </span><span class="identifier-syntax">entry</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">fail</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">LOG_INDENT</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">Log::aspect_switched_on</span><span class="plain-syntax">(</span><span class="constant-syntax">ACTION_PATTERN_PARSING_DA</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"validating "</span><span class="plain-syntax">); </span><a href="4-anl.html#SP26" class="function-link"><span class="function-syntax">ActionNameLists::log_clause</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">); </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">" - "</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">check</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">switch</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">clause_ID</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">NOUN_AP_CLAUSE:</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">check</span><span class="plain-syntax"> = </span><span class="identifier-syntax">K_object</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">an</span><span class="plain-syntax">) </span><span class="identifier-syntax">check</span><span class="plain-syntax"> = </span><a href="4-as.html#SP4" class="function-link"><span class="function-syntax">ActionSemantics::kind_of_noun</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">an</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">SECOND_AP_CLAUSE:</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">check</span><span class="plain-syntax"> = </span><span class="identifier-syntax">K_object</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">an</span><span class="plain-syntax">) </span><span class="identifier-syntax">check</span><span class="plain-syntax"> = </span><a href="4-as.html#SP4" class="function-link"><span class="function-syntax">ActionSemantics::kind_of_second</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">an</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">IN_AP_CLAUSE:</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">check</span><span class="plain-syntax"> = </span><span class="identifier-syntax">K_object</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">IN_THE_PRESENCE_OF_AP_CLAUSE:</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">check</span><span class="plain-syntax"> = </span><span class="identifier-syntax">K_object</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="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">stv_to_match</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">rv</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">PluginCalls::validate_AP_clause</span><span class="plain-syntax">(</span><span class="identifier-syntax">an</span><span class="plain-syntax">, </span><span class="identifier-syntax">c</span><span class="plain-syntax">, &</span><span class="identifier-syntax">rv</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">Log::aspect_switched_on</span><span class="plain-syntax">(</span><span class="constant-syntax">ACTION_PATTERN_PARSING_DA</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"referred to plugin - "</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">rv</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">Log::aspect_switched_on</span><span class="plain-syntax">(</span><span class="constant-syntax">ACTION_PATTERN_PARSING_DA</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"failed badly with problem\n"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_OUTDENT</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">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">check</span><span class="plain-syntax"> = </span><span class="identifier-syntax">SharedVariables::get_kind</span><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">stv_to_match</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">Node::is</span><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">evaluation</span><span class="plain-syntax">, </span><span class="identifier-syntax">UNKNOWN_NT</span><span class="plain-syntax">)) </span><span class="identifier-syntax">fail</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">else</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">Log::aspect_switched_on</span><span class="plain-syntax">(</span><span class="constant-syntax">ACTION_PATTERN_PARSING_DA</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"using Dash with kind %u - "</span><span class="plain-syntax">, </span><span class="identifier-syntax">check</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">check</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">Dash::validate_parameter</span><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">evaluation</span><span class="plain-syntax">, </span><span class="identifier-syntax">check</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">fail</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</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">Log::aspect_switched_on</span><span class="plain-syntax">(</span><span class="constant-syntax">ACTION_PATTERN_PARSING_DA</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">fail</span><span class="plain-syntax">) </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"fail\n"</span><span class="plain-syntax">); </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"pass\n"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG_OUTDENT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-pc.html#SP1_1">§1.1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP1_2" class="paragraph-anchor"></a><b>§1.2. </b>This is where heterogenous patterns like "dropping a thing or taking a
|
|
container" are thrown out: only the last-placed action is allowed to have
|
|
clauses.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Reject the resulting list if two or more entries contain clauses</span><span class="named-paragraph-number">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="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</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">LOOP_THROUGH_ANL</span><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">, </span><span class="identifier-syntax">list</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">entry</span><span class="plain-syntax">-></span><span class="element-syntax">parsing_data</span><span class="plain-syntax">.</span><span class="element-syntax">anl_clauses</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">N</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">N</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">pap_failure_reason</span><span class="plain-syntax"> = </span><span class="constant-syntax">MIXEDNOUNS_PAPF</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">ACTION_PATTERN_PARSING</span><span class="plain-syntax">, </span><span class="string-syntax">"Rejecting with mixed nouns\n"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-pc.html#SP1">§1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP1_3" class="paragraph-anchor"></a><b>§1.3. </b>And this is where impossible mixtures of actions are thrown out: for
|
|
example, if there is an action "setting" whose noun is a number, then
|
|
"taking or setting 50" will be thrown out because the two actions here
|
|
disagree about the meaning of the noun.
|
|
</p>
|
|
|
|
<p class="commentary">Similarly, "looking or taking a vehicle" is thrown out because looking has
|
|
no noun.
|
|
</p>
|
|
|
|
<p class="commentary">This is done in the interests of having a type-safe way to compile the
|
|
pattern check, but really it also avoids allowing action patterns which
|
|
look like syllepses.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Reject the resulting list if, given the clauses, two actions are immiscible</span><span class="named-paragraph-number">1.3</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">immiscible</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">no_oow</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">no_iw</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">no_of_pars</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">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kinds_observed_in_list</span><span class="plain-syntax">[2];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">kinds_observed_in_list</span><span class="plain-syntax">[0] = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">kinds_observed_in_list</span><span class="plain-syntax">[1] = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_ANL</span><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">, </span><span class="identifier-syntax">list</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-anl.html#SP12" class="function-link"><span class="function-syntax">ActionNameLists::nap</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">entry</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">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">nouns_in_entry</span><span class="plain-syntax"> = </span><a href="4-anl.html#SP16" class="function-link"><span class="function-syntax">ActionNameLists::noun_count</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">entry</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">nouns_in_entry</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">no_of_pars</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">immiscible</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">no_of_pars</span><span class="plain-syntax"> = </span><span class="identifier-syntax">nouns_in_entry</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">action_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">this</span><span class="plain-syntax"> = </span><a href="4-anl.html#SP12" class="function-link"><span class="function-syntax">ActionNameLists::action</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">entry</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">this</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-as.html#SP4" class="function-link"><span class="function-syntax">ActionSemantics::is_out_of_world</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">this</span><span class="plain-syntax">)) </span><span class="identifier-syntax">no_oow</span><span class="plain-syntax">++; </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">no_iw</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">nouns_in_entry</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">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">K</span><span class="plain-syntax"> = </span><a href="4-as.html#SP4" class="function-link"><span class="function-syntax">ActionSemantics::kind_of_noun</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">this</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">A</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kinds_observed_in_list</span><span class="plain-syntax">[0];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">A</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">A</span><span class="plain-syntax">, </span><span class="identifier-syntax">K</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">immiscible</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">kinds_observed_in_list</span><span class="plain-syntax">[0] = </span><span class="identifier-syntax">K</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">nouns_in_entry</span><span class="plain-syntax"> >= </span><span class="constant-syntax">2</span><span class="plain-syntax">) {</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><a href="4-as.html#SP4" class="function-link"><span class="function-syntax">ActionSemantics::kind_of_second</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">this</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">kind</span><span class="plain-syntax"> *</span><span class="identifier-syntax">A</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kinds_observed_in_list</span><span class="plain-syntax">[1];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">A</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">A</span><span class="plain-syntax">, </span><span class="identifier-syntax">K</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">immiscible</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">kinds_observed_in_list</span><span class="plain-syntax">[1] = </span><span class="identifier-syntax">K</span><span class="plain-syntax">;</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">no_oow</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">no_iw</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">)) </span><span class="identifier-syntax">immiscible</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_ANL</span><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">, </span><span class="identifier-syntax">list</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">action_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">an</span><span class="plain-syntax"> = </span><a href="4-anl.html#SP12" class="function-link"><span class="function-syntax">ActionNameLists::action</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">entry</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">an</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">no_of_pars</span><span class="plain-syntax"> >= </span><span class="constant-syntax">1</span><span class="plain-syntax">) && (</span><a href="4-as.html#SP4" class="function-link"><span class="function-syntax">ActionSemantics::can_have_noun</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">an</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">immiscible</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">no_of_pars</span><span class="plain-syntax"> >= </span><span class="constant-syntax">2</span><span class="plain-syntax">) && (</span><a href="4-as.html#SP4" class="function-link"><span class="function-syntax">ActionSemantics::can_have_second</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">an</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">immiscible</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</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">immiscible</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">pap_failure_reason</span><span class="plain-syntax"> = </span><span class="constant-syntax">IMMISCIBLE_PAPF</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">ACTION_PATTERN_PARSING</span><span class="plain-syntax">, </span><span class="string-syntax">"Rejecting with immiscible actions\n"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-pc.html#SP1">§1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP1_4" class="paragraph-anchor"></a><b>§1.4. </b>Fanfares and trumpets voluntary:
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Produce and return an action pattern from what survives of the list</span><span class="named-paragraph-number">1.4</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">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</span><span class="plain-syntax"> = </span><a href="4-ap2.html#SP4" class="function-link"><span class="function-syntax">ActionPatterns::new</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">anl_item</span><span class="plain-syntax"> *</span><span class="identifier-syntax">first</span><span class="plain-syntax"> = </span><a href="4-anl.html#SP11" class="function-link"><span class="function-syntax">ActionNameLists::first_item</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">list</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">first</span><span class="plain-syntax">) && ((</span><span class="identifier-syntax">first</span><span class="plain-syntax">-></span><span class="element-syntax">action_listed</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">first</span><span class="plain-syntax">-></span><span class="element-syntax">nap_listed</span><span class="plain-syntax">))) </span><span class="identifier-syntax">ap</span><span class="plain-syntax">-></span><span class="element-syntax">action_list</span><span class="plain-syntax"> = </span><span class="identifier-syntax">list</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_ANL</span><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">, </span><span class="identifier-syntax">list</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_ANL_CLAUSES</span><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">, </span><span class="identifier-syntax">entry</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">ACTION_PATTERN_PARSING</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"Succeeds with clause %d = '%W'\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">clause_ID</span><span class="plain-syntax">, </span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">clause_text</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">c</span><span class="plain-syntax">-></span><span class="element-syntax">stv_to_match</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="4-apc.html#SP14" class="function-link"><span class="function-syntax">APClauses::set_action_variable_spec</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">stv_to_match</span><span class="plain-syntax">, </span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">evaluation</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span>
|
|
<span class="plain-syntax"> </span><a href="4-apc.html#SP7" class="function-link"><span class="function-syntax">APClauses::set_spec</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ap</span><span class="plain-syntax">, </span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">clause_ID</span><span class="plain-syntax">, </span><span class="identifier-syntax">c</span><span class="plain-syntax">-></span><span class="element-syntax">evaluation</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">ap</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-pc.html#SP1">§1</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. Internal test. </b>This is an all-singing, all-dancing way to test Level 7 and, along with it, the
|
|
action name list parser. In effect, there's a cutesy mini-language for what you
|
|
can express in the test wording.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">ParseClauses::perform_pattern_internal_test</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">ParseClauses::perform_pattern_internal_test</span></span>:<br/>IF Module - <a href="1-im.html#SP2">§2</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">OUTPUT_STREAM</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">internal_test_case</span><span class="plain-syntax"> *</span><span class="identifier-syntax">itc</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">saved</span><span class="plain-syntax"> = </span><a href="4-pap.html#SP2" class="function-link"><span class="function-syntax">ParseActionPatterns::enter_mode</span></a><span class="plain-syntax">(</span><span class="constant-syntax">PERMIT_TRYING_OMISSION</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="function-syntax"><perform-ap-test>(itc-></span><span class="identifier-syntax">text_supplying_the_case</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-pap.html#SP2" class="function-link"><span class="function-syntax">ParseActionPatterns::restore_mode</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">saved</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>§3. </b>The mini-language is interpreted: to parse it is to run it. Notably, it also
|
|
enables named action patterns to be created, so that we can then parse them
|
|
back again:
|
|
</p>
|
|
|
|
<pre class="Preform-displayed-code all-displayed-code code-font">
|
|
<span class="Preform-function-syntax"><perform-ap-test></span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
|
|
<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">list</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">{...}</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==></span><span class="Preform-plain-syntax"> { -, - }; ActionNameLists::test_list(WR[1]);</span>
|
|
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax"><test-ap></span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==></span><span class="Preform-plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-pc.html#SP3_1" class="named-paragraph-link"><span class="named-paragraph">Write textual AP test result</span><span class="named-paragraph-number">3.1</span></a></span>
|
|
<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax"><test-ap></span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">~~</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax"><test-ap></span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==></span><span class="Preform-plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-pc.html#SP3_2" class="named-paragraph-link"><span class="named-paragraph">Write comparison AP test result</span><span class="named-paragraph-number">3.2</span></a></span>
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<span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">...</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==></span><span class="Preform-plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-pc.html#SP3_3" class="named-paragraph-link"><span class="named-paragraph">Write failure</span><span class="named-paragraph-number">3.3</span></a></span>
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<span class="Preform-function-syntax"><test-ap></span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
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<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax"><test-ap></span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">is</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">{...}</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==></span><span class="Preform-plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-pc.html#SP3_4" class="named-paragraph-link"><span class="named-paragraph">Make a named action pattern</span><span class="named-paragraph-number">3.4</span></a></span>
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<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax"><test-register></span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">=</span><span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax"><test-ap></span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==></span><span class="Preform-plain-syntax"> { -, ParseClauses::set_reg(R[1], RP[2]) }</span>
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<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax"><action-pattern></span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==></span><span class="Preform-plain-syntax"> { pass 1 }</span>
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<span class="Preform-plain-syntax"> </span><span class="Preform-function-syntax"><test-register></span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==></span><span class="Preform-plain-syntax"> { -, ParseClauses::read_reg(R[1]) }</span>
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<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">experimental</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">{...}</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">==></span><span class="Preform-plain-syntax"> { -, ParseClauses::ap_seven(WR[1]) }</span>
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<span class="Preform-function-syntax"><test-register></span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">::=</span>
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<span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">r1</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">r2</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">r3</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">r4</span><span class="Preform-plain-syntax"> </span><span class="Preform-reserved-syntax">|</span><span class="Preform-plain-syntax"> </span><span class="Preform-constant-syntax">r5</span>
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</pre>
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<ul class="endnotetexts"><li>This is <a href="../words-module/4-ap.html" class="internal">Preform grammar</a>, not regular C code.</li></ul>
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<p class="commentary firstcommentary"><a id="SP3_1" class="paragraph-anchor"></a><b>§3.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Write textual AP test result</span><span class="named-paragraph-number">3.1</span></span><span class="Preform-comment-syntax"> =</span>
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"%W: $A\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">W</span><span class="plain-syntax">, </span><span class="identifier-syntax">RP</span><span class="plain-syntax">[1]);</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="4-pc.html#SP3">§3</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP3_2" class="paragraph-anchor"></a><b>§3.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Write comparison AP test result</span><span class="named-paragraph-number">3.2</span></span><span class="comment-syntax"> =</span>
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">rv</span><span class="plain-syntax"> = </span><a href="4-ap2.html#SP10" class="function-link"><span class="function-syntax">ActionPatterns::compare_specificity</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">RP</span><span class="plain-syntax">[1], </span><span class="identifier-syntax">RP</span><span class="plain-syntax">[2]);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">rv_converse</span><span class="plain-syntax"> = </span><a href="4-ap2.html#SP10" class="function-link"><span class="function-syntax">ActionPatterns::compare_specificity</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">RP</span><span class="plain-syntax">[2], </span><span class="identifier-syntax">RP</span><span class="plain-syntax">[1]);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"%W: "</span><span class="plain-syntax">, </span><span class="identifier-syntax">W</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">rv</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"left is more specific\n"</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">rv</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"right is more specific\n"</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">rv</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"equally specific\n"</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">rv_converse</span><span class="plain-syntax"> != -1*</span><span class="identifier-syntax">rv</span><span class="plain-syntax">) </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"*** Not antisymmetric ***\n"</span><span class="plain-syntax">);</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="4-pc.html#SP3">§3</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP3_3" class="paragraph-anchor"></a><b>§3.3. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Write failure</span><span class="named-paragraph-number">3.3</span></span><span class="comment-syntax"> =</span>
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"%W: failed to parse\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">W</span><span class="plain-syntax">);</span>
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</pre>
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|
<ul class="endnotetexts"><li>This code is used in <a href="4-pc.html#SP3">§3</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP3_4" class="paragraph-anchor"></a><b>§3.4. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Make a named action pattern</span><span class="named-paragraph-number">3.4</span></span><span class="comment-syntax"> =</span>
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax"> </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">W</span><span class="plain-syntax"> = </span><span class="identifier-syntax">GET_RW</span><span class="plain-syntax">(</span><span class="function-syntax"><test-ap></span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">named_action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nap</span><span class="plain-syntax"> = </span><a href="4-nap.html#SP3" class="function-link"><span class="function-syntax">NamedActionPatterns::add</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">RP</span><span class="plain-syntax">[1], </span><span class="identifier-syntax">W</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">new_ap</span><span class="plain-syntax"> = </span><a href="4-ap2.html#SP4" class="function-link"><span class="function-syntax">ActionPatterns::new</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">anl_entry</span><span class="plain-syntax"> *</span><span class="identifier-syntax">entry</span><span class="plain-syntax"> = </span><a href="4-anl.html#SP4" class="function-link"><span class="function-syntax">ActionNameLists::new_entry_at</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">W</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">entry</span><span class="plain-syntax">-></span><span class="identifier-syntax">item</span><span class="plain-syntax">.</span><span class="element-syntax">nap_listed</span><span class="plain-syntax"> = </span><span class="identifier-syntax">nap</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">new_ap</span><span class="plain-syntax">-></span><span class="element-syntax">action_list</span><span class="plain-syntax"> = </span><a href="4-anl.html#SP1" class="function-link"><span class="function-syntax">ActionNameLists::new_list</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">, </span><span class="constant-syntax">ANL_POSITIVE</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> ==> { -, </span><span class="identifier-syntax">new_ap</span><span class="plain-syntax"> };</span>
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</pre>
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<ul class="endnotetexts"><li>This code is used in <a href="4-pc.html#SP3">§3</a>.</li></ul>
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<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>§4. </b>This mini-language has a set of 5 "registers", which are really variables,
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for stashing test results for use in subsequent tests:
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">ap_test_register_initialised</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap_test_register</span><span class="plain-syntax">[5];</span>
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<span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="function-syntax">ParseClauses::read_reg</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">ParseClauses::read_reg</span></span>:<br/><a href="4-pc.html#SP3">§3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">r</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">r</span><span class="plain-syntax"> < </span><span class="constant-syntax">0</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">r</span><span class="plain-syntax"> >= </span><span class="constant-syntax">5</span><span class="plain-syntax">)) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"bad AP register"</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">ap_test_register_initialised</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">ap_test_register_initialised</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><5; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) </span><span class="identifier-syntax">ap_test_register</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ap_test_register</span><span class="plain-syntax">[</span><span class="identifier-syntax">r</span><span class="plain-syntax">];</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="function-syntax">ParseClauses::set_reg</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">ParseClauses::set_reg</span></span>:<br/><a href="4-pc.html#SP3">§3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">r</span><span class="plain-syntax">, </span><span class="reserved-syntax">action_pattern</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ap</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><a href="4-pc.html#SP4" class="function-link"><span class="function-syntax">ParseClauses::read_reg</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">r</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">ap_test_register</span><span class="plain-syntax">[</span><span class="identifier-syntax">r</span><span class="plain-syntax">] = </span><span class="identifier-syntax">ap</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><a href="4-pc.html#SP4" class="function-link"><span class="function-syntax">ParseClauses::read_reg</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">r</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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</pre>
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<ul class="progressbar"><li class="progressprev"><a href="4-pap.html">❮</a></li><li class="progresschapter"><a href="P-wtmd.html">P</a></li><li class="progresschapter"><a href="1-im.html">1</a></li><li class="progresschapter"><a href="2-bd.html">2</a></li><li class="progresschapter"><a href="3-sm.html">3</a></li><li class="progresscurrentchapter">4</li><li class="progresssection"><a href="4-ap.html">ap</a></li><li class="progresssection"><a href="4-anaa.html">anaa</a></li><li class="progresssection"><a href="4-ak.html">ak</a></li><li class="progresssection"><a href="4-ac.html">ac</a></li><li class="progresssection"><a href="4-act.html">act</a></li><li class="progresssection"><a href="4-as.html">as</a></li><li class="progresssection"><a href="4-av.html">av</a></li><li class="progresssection"><a href="4-ann.html">ann</a></li><li class="progresssection"><a href="4-ap2.html">ap2</a></li><li class="progresssection"><a href="4-anl.html">anl</a></li><li class="progresssection"><a href="4-apc.html">apc</a></li><li class="progresssection"><a href="4-pap.html">pap</a></li><li class="progresscurrent">pc</li><li class="progresssection"><a href="4-ea.html">ea</a></li><li class="progresssection"><a href="4-nap.html">nap</a></li><li class="progresssection"><a href="4-gng.html">gng</a></li><li class="progresssection"><a href="4-rpoa.html">rpoa</a></li><li class="progresschapter"><a href="5-pp.html">5</a></li><li class="progressnext"><a href="4-ea.html">❯</a></li></ul></div>
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