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<title>Booklet Title</title>
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<meta http-equiv="Content-Language" content="en-gb">
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<!--Weave of '1/bsc' generated by 7-->
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<ul class="crumbs"><li><a href="../webs.html">★</a></li><li><a href="index.html">inflections-test</a></li><li><a href="index.html#1">Chapter 1: Everything</a></li><li><b>Basics</b></li></ul><p class="purpose">Some fundamental definitions.</p>
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<ul class="toc"><li><a href="#SP1">§1. Build identity</a></li><li><a href="#SP6">§6. Preform error handling</a></li></ul><hr class="tocbar">
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<p class="inwebparagraph"><a id="SP1"></a><b>§1. Build identity. </b>First we define the build, using a notation which tangles out to the current
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build number as specified in the contents section of this web.
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</p>
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<pre class="definitions">
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<span class="definitionkeyword">define</span> <span class="constant">INTOOL_NAME</span><span class="plain"> </span><span class="string">"inflections-test"</span>
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</pre>
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<p class="inwebparagraph"><a id="SP2"></a><b>§2. </b>Since we want to include the words module, we have to define the following
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structure and initialiser:
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</p>
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<pre class="definitions">
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<span class="definitionkeyword">define</span> <span class="constant">VOCABULARY_MEANING_INITIALISER</span><span class="plain"> </span><span class="functiontext">Basics::ignore</span>
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</pre>
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<pre class="display">
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<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">vocabulary_meaning</span><span class="plain"> {</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">enigmatic_number</span><span class="plain">;</span>
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<span class="plain">} </span><span class="reserved">vocabulary_meaning</span><span class="plain">;</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The structure vocabulary_meaning is private to this section.</p>
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<p class="inwebparagraph"><a id="SP3"></a><b>§3. </b></p>
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<pre class="definitions">
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<span class="definitionkeyword">define</span> <span class="constant">LEXER_PROBLEM_HANDLER</span><span class="plain"> </span><span class="functiontext">Basics::lexer_problem_handler</span>
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</pre>
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<pre class="display">
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<span class="reserved">vocabulary_meaning</span><span class="plain"> </span><span class="functiontext">Basics::ignore</span><span class="plain">(</span><span class="reserved">vocabulary_entry</span><span class="plain"> *</span><span class="identifier">ve</span><span class="plain">) {</span>
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<span class="reserved">vocabulary_meaning</span><span class="plain"> </span><span class="identifier">vm</span><span class="plain">;</span>
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<span class="identifier">vm</span><span class="element">.enigmatic_number</span><span class="plain"> = 16339;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">vm</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Basics::lexer_problem_handler</span><span class="plain">(</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">err</span><span class="plain">, </span><span class="reserved">text_stream</span><span class="plain"> *</span><span class="identifier">problem_source_description</span><span class="plain">, </span><span class="identifier">wchar_t</span><span class="plain"> *</span><span class="identifier">word</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">err</span><span class="plain"> == </span><span class="constant">MEMORY_OUT_LEXERERROR</span><span class="plain">)</span>
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<span class="functiontext">Errors::fatal</span><span class="plain">(</span><span class="string">"Out of memory: unable to create lexer workspace"</span><span class="plain">);</span>
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<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">word_t</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">word</span><span class="plain">) </span><span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">word_t</span><span class="plain">, </span><span class="string">"%w"</span><span class="plain">, </span><span class="identifier">word</span><span class="plain">);</span>
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<span class="reserved">switch</span><span class="plain"> (</span><span class="identifier">err</span><span class="plain">) {</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="constant">STRING_TOO_LONG_LEXERERROR</span><span class="plain">:</span>
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<span class="functiontext">Errors::with_text</span><span class="plain">(</span><span class="string">"Too much text in quotation marks: %S"</span><span class="plain">, </span><span class="identifier">word_t</span><span class="plain">);</span>
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<span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="constant">WORD_TOO_LONG_LEXERERROR</span><span class="plain">:</span>
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<span class="functiontext">Errors::with_text</span><span class="plain">(</span><span class="string">"Word too long: %S"</span><span class="plain">, </span><span class="identifier">word_t</span><span class="plain">);</span>
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<span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="constant">I6_TOO_LONG_LEXERERROR</span><span class="plain">:</span>
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<span class="functiontext">Errors::with_text</span><span class="plain">(</span><span class="string">"I6 inclusion too long: %S"</span><span class="plain">, </span><span class="identifier">word_t</span><span class="plain">);</span>
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<span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="constant">STRING_NEVER_ENDS_LEXERERROR</span><span class="plain">:</span>
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<span class="functiontext">Errors::with_text</span><span class="plain">(</span><span class="string">"Quoted text never ends: %S"</span><span class="plain">, </span><span class="identifier">problem_source_description</span><span class="plain">);</span>
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<span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="constant">COMMENT_NEVER_ENDS_LEXERERROR</span><span class="plain">:</span>
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<span class="functiontext">Errors::with_text</span><span class="plain">(</span><span class="string">"Square-bracketed text never ends: %S"</span><span class="plain">, </span><span class="identifier">problem_source_description</span><span class="plain">);</span>
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<span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">case</span><span class="plain"> </span><span class="constant">I6_NEVER_ENDS_LEXERERROR</span><span class="plain">:</span>
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<span class="functiontext">Errors::with_text</span><span class="plain">(</span><span class="string">"I6 inclusion text never ends: %S"</span><span class="plain">, </span><span class="identifier">problem_source_description</span><span class="plain">);</span>
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<span class="reserved">break</span><span class="plain">;</span>
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<span class="reserved">default</span><span class="plain">:</span>
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<span class="identifier">internal_error</span><span class="plain">(</span><span class="string">"unknown lexer error"</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">word_t</span><span class="plain">);</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function Basics::ignore appears nowhere else.</p>
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<p class="endnote">The function Basics::lexer_problem_handler appears nowhere else.</p>
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<p class="inwebparagraph"><a id="SP4"></a><b>§4. </b></p>
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<pre class="definitions">
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<span class="definitionkeyword">define</span> <span class="constant">PREFORM_LANGUAGE_TYPE</span><span class="plain"> </span><span class="reserved">void</span>
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<span class="definitionkeyword">define</span> <span class="constant">VERB_MEANING_TYPE</span><span class="plain"> </span><span class="reserved">void</span>
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</pre>
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<p class="inwebparagraph"><a id="SP5"></a><b>§5. </b></p>
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<pre class="display">
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</pre>
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<p class="inwebparagraph"></p>
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<p class="inwebparagraph"><a id="SP6"></a><b>§6. Preform error handling. </b></p>
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<pre class="definitions">
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<span class="definitionkeyword">define</span> <span class="constant">PREFORM_ERROR_HANDLER</span><span class="plain"> </span><span class="functiontext">Basics::preform_problem_handler</span>
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</pre>
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<pre class="display">
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<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Basics::preform_problem_handler</span><span class="plain">(</span><span class="reserved">word_assemblage</span><span class="plain"> </span><span class="identifier">base_text</span><span class="plain">, </span><span class="reserved">nonterminal</span><span class="plain"> *</span><span class="identifier">nt</span><span class="plain">,</span>
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<span class="reserved">production</span><span class="plain"> *</span><span class="identifier">pr</span><span class="plain">, </span><span class="reserved">char</span><span class="plain"> *</span><span class="identifier">message</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">pr</span><span class="plain">) {</span>
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<span class="identifier">LOG</span><span class="plain">(</span><span class="string">"The production at fault is:\</span><span class="plain">n</span><span class="string">"</span><span class="plain">);</span>
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<span class="functiontext">Preform::log_production</span><span class="plain">(</span><span class="identifier">pr</span><span class="plain">, </span><span class="constant">FALSE</span><span class="plain">); </span><span class="identifier">LOG</span><span class="plain">(</span><span class="string">"\</span><span class="plain">n</span><span class="string">"</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">ERM</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">nt</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">)</span>
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<span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">ERM</span><span class="plain">, </span><span class="string">"(no nonterminal)"</span><span class="plain">);</span>
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<span class="reserved">else</span>
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<span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">ERM</span><span class="plain">, </span><span class="string">"nonterminal %w"</span><span class="plain">, </span><span class="functiontext">Vocabulary::get_exemplar</span><span class="plain">(</span><span class="identifier">nt</span><span class="plain">-</span><span class="element">>nonterminal_id</span><span class="plain">, </span><span class="constant">FALSE</span><span class="plain">));</span>
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<span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">ERM</span><span class="plain">, </span><span class="string">": "</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">WordAssemblages::nonempty</span><span class="plain">(</span><span class="identifier">base_text</span><span class="plain">))</span>
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<span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">ERM</span><span class="plain">, </span><span class="string">"can't conjugate verb '%A': "</span><span class="plain">, &</span><span class="identifier">base_text</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">pr</span><span class="plain">) {</span>
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<span class="identifier">TEMPORARY_TEXT</span><span class="plain">(</span><span class="identifier">TEMP</span><span class="plain">);</span>
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<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">ptoken</span><span class="plain"> *</span><span class="identifier">pt</span><span class="plain"> = </span><span class="identifier">pr</span><span class="plain">-</span><span class="element">>first_ptoken</span><span class="plain">; </span><span class="identifier">pt</span><span class="plain">; </span><span class="identifier">pt</span><span class="plain"> = </span><span class="identifier">pt</span><span class="plain">-</span><span class="element">>next_ptoken</span><span class="plain">) {</span>
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<span class="functiontext">Preform::write_ptoken</span><span class="plain">(</span><span class="identifier">TEMP</span><span class="plain">, </span><span class="identifier">pt</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">pt</span><span class="plain">-</span><span class="element">>next_ptoken</span><span class="plain">) </span><span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">TEMP</span><span class="plain">, </span><span class="string">" "</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">ERM</span><span class="plain">, </span><span class="string">"line %d ('%S'): "</span><span class="plain">, </span><span class="identifier">pr</span><span class="plain">-</span><span class="element">>match_number</span><span class="plain">, </span><span class="identifier">TEMP</span><span class="plain">);</span>
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<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">TEMP</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">ERM</span><span class="plain">, </span><span class="string">"%s"</span><span class="plain">, </span><span class="identifier">message</span><span class="plain">);</span>
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<span class="functiontext">Errors::with_text</span><span class="plain">(</span><span class="string">"Preform error: %S"</span><span class="plain">, </span><span class="identifier">ERM</span><span class="plain">);</span>
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<span class="identifier">DISCARD_TEXT</span><span class="plain">(</span><span class="identifier">ERM</span><span class="plain">);</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function Basics::preform_problem_handler appears nowhere else.</p>
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<hr class="tocbar">
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<ul class="toc"><li><i>(This section begins Chapter 1: Everything.)</i></li><li><a href="1-pc.html">Continue with 'Program Control'</a></li></ul><hr class="tocbar">
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<!--End of weave-->
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