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<!--Weave of 'Variables' 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="../compiler.html">Inform7</a></li><li><a href="index.html">runtime</a></li><li><a href="index.html#4">Chapter 4: Compilation Utilities</a></li><li><b>Variables</b></li></ul></div>
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<p class="purpose">To compile run-time support for nonlocal variables.</p>
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">typedef</span><span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">variable_compilation_data</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv_iname</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">nlv_name_translated</span><span class="plain-syntax">; </span><span class="comment-syntax"> has this been given storage as an I6 variable?</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax"> </span><span class="identifier-syntax">rvalue_nve</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax"> </span><span class="identifier-syntax">lvalue_nve</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv_write_schema</span><span class="plain-syntax">; </span><span class="comment-syntax"> or </span><span class="extract"><span class="extract-syntax">NULL</span></span><span class="comment-syntax"> to assign to the L-value form</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">housed_in_variables_array</span><span class="plain-syntax">; </span><span class="comment-syntax"> i.e. </span><span class="extract"><span class="extract-syntax">FALSE</span></span><span class="comment-syntax"> if stored elsewhere</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">var_is_initialisable_anyway</span><span class="plain-syntax">; </span><span class="comment-syntax"> meaningful only if </span><span class="extract"><span class="extract-syntax">housed_in_variables_array</span></span><span class="comment-syntax"> is </span><span class="extract"><span class="extract-syntax">FALSE</span></span>
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<span class="plain-syntax">} </span><span class="reserved-syntax">variable_compilation_data</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">variable_compilation_data</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::new_compilation_data</span><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">variable_compilation_data</span><span class="plain-syntax"> </span><span class="identifier-syntax">data</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">data</span><span class="plain-syntax">.</span><span class="element-syntax">nlv_iname</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">data</span><span class="plain-syntax">.</span><span class="element-syntax">nlv_name_translated</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">data</span><span class="plain-syntax">.</span><span class="element-syntax">rvalue_nve</span><span class="plain-syntax"> = </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::new_nve</span></a><span class="plain-syntax">();</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">data</span><span class="plain-syntax">.</span><span class="element-syntax">lvalue_nve</span><span class="plain-syntax"> = </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::new_nve</span></a><span class="plain-syntax">();</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">data</span><span class="plain-syntax">.</span><span class="element-syntax">nlv_write_schema</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">data</span><span class="plain-syntax">.</span><span class="element-syntax">housed_in_variables_array</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">data</span><span class="plain-syntax">.</span><span class="element-syntax">var_is_initialisable_anyway</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="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">data</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::make_initialisable</span><span class="plain-syntax">(</span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">var_is_initialisable_anyway</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>
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::is_initialisable</span><span class="plain-syntax">(</span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv</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">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">housed_in_variables_array</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">var_is_initialisable_anyway</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">typedef</span><span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">iname_form</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">textual_form</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">nothing_form</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">stv_ID</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">stv_index</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">allow_outside</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">use_own_iname</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">} </span><span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::new_nve</span><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax">.</span><span class="element-syntax">iname_form</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">nve</span><span class="plain-syntax">.</span><span class="element-syntax">textual_form</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::new</span><span class="plain-syntax">();</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax">.</span><span class="element-syntax">stv_ID</span><span class="plain-syntax"> = -1;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax">.</span><span class="element-syntax">stv_index</span><span class="plain-syntax"> = -1;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax">.</span><span class="element-syntax">allow_outside</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">nve</span><span class="plain-syntax">.</span><span class="element-syntax">use_own_iname</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">nve</span><span class="plain-syntax">.</span><span class="element-syntax">nothing_form</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="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::nve_from_nothing</span><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax"> = </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::new_nve</span></a><span class="plain-syntax">();</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">nve</span><span class="plain-syntax">.</span><span class="element-syntax">textual_form</span><span class="plain-syntax">, </span><span class="string-syntax">"nothing"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax">.</span><span class="element-syntax">nothing_form</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::nve_from_iname</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">RTVariables::nve_from_iname</span></span>:<br/><a href="4-vrb.html#SP4">§4</a><br/>Temporary Variables - <a href="4-tv.html#SP3">§3</a><br/>Parsing - <a href="5-prs.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">iname</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax"> = </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::new_nve</span></a><span class="plain-syntax">();</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax">.</span><span class="element-syntax">iname_form</span><span class="plain-syntax"> = </span><span class="identifier-syntax">iname</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">nve</span><span class="plain-syntax">.</span><span class="element-syntax">textual_form</span><span class="plain-syntax">, </span><span class="string-syntax">"%n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">iname</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::nve_from_mstack</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">RTVariables::nve_from_mstack</span></span>:<br/><a href="4-vrb.html#SP4">§4</a><br/>Going - <a href="5-gng.html#SP1">§1</a></span></button><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="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">index</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">allow_outside</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax"> = </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::new_nve</span></a><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">allow_outside</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">nve</span><span class="plain-syntax">.</span><span class="element-syntax">textual_form</span><span class="plain-syntax">, </span><span class="string-syntax">"(MStack-->MstVON(%d,%d))"</span><span class="plain-syntax">, </span><span class="identifier-syntax">N</span><span class="plain-syntax">, </span><span class="identifier-syntax">index</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">else</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">nve</span><span class="plain-syntax">.</span><span class="element-syntax">textual_form</span><span class="plain-syntax">, </span><span class="string-syntax">"(MStack-->MstVO(%d,%d))"</span><span class="plain-syntax">, </span><span class="identifier-syntax">N</span><span class="plain-syntax">, </span><span class="identifier-syntax">index</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax">.</span><span class="element-syntax">stv_ID</span><span class="plain-syntax"> = </span><span class="identifier-syntax">N</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax">.</span><span class="element-syntax">stv_index</span><span class="plain-syntax"> = </span><span class="identifier-syntax">index</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax">.</span><span class="element-syntax">allow_outside</span><span class="plain-syntax"> = </span><span class="identifier-syntax">allow_outside</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">nve</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::nve_from_pos</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">RTVariables::nve_from_pos</span></span>:<br/><a href="4-vrb.html#SP4">§4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax"> = </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::new_nve</span></a><span class="plain-syntax">();</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax">.</span><span class="element-syntax">use_own_iname</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">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">nve</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::identifier_translates</span><span class="plain-syntax">(</span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">, </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">name</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">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">nlv_name_translated</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::sentence_problem</span><span class="plain-syntax">(</span><span class="identifier-syntax">Task::syntax_tree</span><span class="plain-syntax">(),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_QuantityTranslatedAlready</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"this variable has already been translated"</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"so there must be some duplication somewhere."</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">nlv_name_translated</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">Str::eq</span><span class="plain-syntax">(</span><span class="identifier-syntax">name</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"nothing"</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-vrb.html#SP2" class="function-link"><span class="function-syntax">RTVariables::set_I6_identifier</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::nve_from_nothing</span></a><span class="plain-syntax">());</span>
|
|
<span class="plain-syntax"> </span><a href="4-vrb.html#SP2" class="function-link"><span class="function-syntax">RTVariables::set_I6_identifier</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">, </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::nve_from_nothing</span></a><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">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">as_iname</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Produce::find_by_name</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-vrb.html#SP2" class="function-link"><span class="function-syntax">RTVariables::set_I6_identifier</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::nve_from_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">as_iname</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="4-vrb.html#SP2" class="function-link"><span class="function-syntax">RTVariables::set_I6_identifier</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">, </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::nve_from_iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">as_iname</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>The structure variable_compilation_data is accessed in 4/tv and here.</li><li>The structure nonlocal_variable_emission is private to this section.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. </b>In general, the following allows us to set the R-value and L-value forms
|
|
of the variable's storage. An R-value is the form of the variable on the
|
|
right-hand side of an assignment, that is, when we're reading it; an L-value
|
|
is the form used when we're setting it. Often these will be the same, but
|
|
not always.
|
|
</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">RTVariables::set_I6_identifier</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">RTVariables::set_I6_identifier</span></span>:<br/><a href="4-vrb.html#SP1">§1</a>, <a href="4-vrb.html#SP4">§4</a><br/>Temporary Variables - <a href="4-tv.html#SP3">§3</a><br/>Parsing - <a href="5-prs.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">left</span><span class="plain-syntax">, </span><span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax"> </span><span class="identifier-syntax">nve</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">Str::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">nve</span><span class="plain-syntax">.</span><span class="element-syntax">textual_form</span><span class="plain-syntax">) > </span><span class="constant-syntax">30</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"name too long"</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">nlv</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"null nlv"</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">left</span><span class="plain-syntax">) </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">lvalue_nve</span><span class="plain-syntax"> = </span><span class="identifier-syntax">nve</span><span class="plain-syntax">; </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">rvalue_nve</span><span class="plain-syntax"> = </span><span class="identifier-syntax">nve</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">housed_in_variables_array</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</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>Later, when we actually need to know where these are being stored, we assign
|
|
run-time locations to any variable without them:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="function-syntax">RTVariables::get_identifier</span><button class="popup" onclick="togglePopup('usagePopup5')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup5">Usage of <span class="code-font"><span class="function-syntax">RTVariables::get_identifier</span></span>:<br/><a href="4-vrb.html#SP5">§5</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv</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">Str::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">rvalue_nve</span><span class="plain-syntax">.</span><span class="element-syntax">textual_form</span><span class="plain-syntax">) == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><a href="4-vrb.html#SP4" class="function-link"><span class="function-syntax">RTVariables::allocate_storage</span></a><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">Str::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">rvalue_nve</span><span class="plain-syntax">.</span><span class="element-syntax">textual_form</span><span class="plain-syntax">) == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="4-vrb.html#SP3_1" class="named-paragraph-link"><span class="named-paragraph">Issue a missing meaning problem</span><span class="named-paragraph-number">3.1</span></a></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">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="identifier-syntax">rvalue_nve</span><span class="plain-syntax">.</span><span class="element-syntax">textual_form</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<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">Issue a missing meaning problem</span><span class="named-paragraph-number">3.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_source</span><span class="plain-syntax">(1, </span><span class="identifier-syntax">current_sentence</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_wording</span><span class="plain-syntax">(2, </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="element-syntax">name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::handmade_problem</span><span class="plain-syntax">(</span><span class="identifier-syntax">Task::syntax_tree</span><span class="plain-syntax">(), </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">BelievedImpossible</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_segment</span><span class="plain-syntax">(</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"The sentence %1 seems to need the value '%2', but that currently "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"has no definition."</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_end</span><span class="plain-syntax">();</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="string-syntax">"self"</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-vrb.html#SP3">§3</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>§4. </b>And the allocation is done here. Variables not stored anywhere else are
|
|
marked to be housed in an array, though it's really up to the code-generator
|
|
tp make that decision:
|
|
</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">RTVariables::allocate_storage</span><button class="popup" onclick="togglePopup('usagePopup6')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup6">Usage of <span class="code-font"><span class="function-syntax">RTVariables::allocate_storage</span></span>:<br/><a href="4-vrb.html#SP3">§3</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">void</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">var</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER</span><span class="plain-syntax">(</span><span class="identifier-syntax">var</span><span class="plain-syntax">, </span><span class="identifier-syntax">nonlocal_variable</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">Str::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">var</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">lvalue_nve</span><span class="plain-syntax">.</span><span class="element-syntax">textual_form</span><span class="plain-syntax">) == </span><span class="constant-syntax">0</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">Str::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">var</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">rvalue_nve</span><span class="plain-syntax">.</span><span class="element-syntax">textual_form</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">var</span><span class="plain-syntax">-></span><span class="identifier-syntax">constant_at_run_time</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">var</span><span class="plain-syntax">-></span><span class="identifier-syntax">var_is_bibliographic</span><span class="plain-syntax">))) {</span>
|
|
<span class="plain-syntax"> </span><a href="4-vrb.html#SP2" class="function-link"><span class="function-syntax">RTVariables::set_I6_identifier</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">var</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::nve_from_pos</span></a><span class="plain-syntax">());</span>
|
|
<span class="plain-syntax"> </span><a href="4-vrb.html#SP2" class="function-link"><span class="function-syntax">RTVariables::set_I6_identifier</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">var</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">, </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::nve_from_pos</span></a><span class="plain-syntax">());</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">var</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">housed_in_variables_array</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">nonlocal_variable_emission</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::stv_lvalue</span><span class="plain-syntax">(</span><span class="identifier-syntax">stacked_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">stv</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">stv</span><span class="plain-syntax">-></span><span class="identifier-syntax">owner_id</span><span class="plain-syntax"> == </span><span class="identifier-syntax">ACTION_PROCESSING_RB</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">stv</span><span class="plain-syntax">-></span><span class="identifier-syntax">offset_in_owning_frame</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::nve_from_iname</span></a><span class="plain-syntax">(</span><a href="2-hrr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::find</span></a><span class="plain-syntax">(</span><span class="constant-syntax">ACTOR_HL</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">return</span><span class="plain-syntax"> </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::nve_from_mstack</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">stv</span><span class="plain-syntax">-></span><span class="identifier-syntax">owner_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">stv</span><span class="plain-syntax">-></span><span class="identifier-syntax">offset_in_owning_frame</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">nonlocal_variable_emission</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::stv_rvalue</span><span class="plain-syntax">(</span><span class="identifier-syntax">stacked_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">stv</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">stv</span><span class="plain-syntax">-></span><span class="identifier-syntax">owner_id</span><span class="plain-syntax"> == </span><span class="identifier-syntax">ACTION_PROCESSING_RB</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">stv</span><span class="plain-syntax">-></span><span class="identifier-syntax">offset_in_owning_frame</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::nve_from_iname</span></a><span class="plain-syntax">(</span><a href="2-hrr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::find</span></a><span class="plain-syntax">(</span><span class="constant-syntax">ACTOR_HL</span><span class="plain-syntax">));</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">else</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><a href="4-vrb.html#SP1" class="function-link"><span class="function-syntax">RTVariables::nve_from_mstack</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">stv</span><span class="plain-syntax">-></span><span class="identifier-syntax">owner_id</span><span class="plain-syntax">, </span><span class="identifier-syntax">stv</span><span class="plain-syntax">-></span><span class="identifier-syntax">offset_in_owning_frame</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>
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<span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="function-syntax">RTVariables::iname</span><button class="popup" onclick="togglePopup('usagePopup7')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup7">Usage of <span class="code-font"><span class="function-syntax">RTVariables::iname</span></span>:<br/><a href="4-vrb.html#SP5">§5</a>, <a href="4-vrb.html#SP5_1">§5.1</a><br/>Hierarchy - <a href="2-hrr.html#SP3">§3</a><br/>Routines - <a href="4-rtn.html#SP5_1_2">§5.1.2</a>, <a href="4-rtn.html#SP5_1_4">§5.1.4</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv</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">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">nlv_iname</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">package_request</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><a href="2-hrr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::package</span></a><span class="plain-syntax">(</span><a href="2-cu.html#SP5" class="function-link"><span class="function-syntax">CompilationUnits::find</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">nlv_created_at</span><span class="plain-syntax">), </span><span class="constant-syntax">VARIABLES_HAP</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><a href="2-hrr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::markup_wording</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="constant-syntax">VARIABLE_NAME_HMD</span><span class="plain-syntax">, </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="element-syntax">name</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">nlv_iname</span><span class="plain-syntax"> = </span><a href="2-hrr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::make_iname_with_memo</span></a><span class="plain-syntax">(</span><span class="constant-syntax">VARIABLE_HL</span><span class="plain-syntax">, </span><span class="identifier-syntax">R</span><span class="plain-syntax">, </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="element-syntax">name</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">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="identifier-syntax">nlv_iname</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="SP5" class="paragraph-anchor"></a><b>§5. </b>In extreme cases, it's even possible to set an explicit I6 schema for how
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to change a variable:
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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">void</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::set_write_schema</span><button class="popup" onclick="togglePopup('usagePopup8')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup8">Usage of <span class="code-font"><span class="function-syntax">RTVariables::set_write_schema</span></span>:<br/>The Player - <a href="5-tp.html#SP2">§2</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">, </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">sch</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">nlv_write_schema</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::duplicate</span><span class="plain-syntax">(</span><span class="identifier-syntax">sch</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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<span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="function-syntax">RTVariables::get_write_schema</span><span class="plain-syntax">(</span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><a href="4-vrb.html#SP5" class="function-link"><span class="function-syntax">RTVariables::warn_about_change</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">nlv</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">nlv</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="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="identifier-syntax">nlv_write_schema</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::warn_about_change</span><span class="plain-syntax">(</span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> #</span><span class="identifier-syntax">ifdef</span><span class="plain-syntax"> </span><span class="identifier-syntax">IF_MODULE</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">score_VAR</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">nlv</span><span class="plain-syntax"> == </span><span class="identifier-syntax">score_VAR</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">global_compilation_settings</span><span class="plain-syntax">.</span><span class="identifier-syntax">scoring_option_set</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">global_compilation_settings</span><span class="plain-syntax">.</span><span class="identifier-syntax">scoring_option_set</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NOT_APPLICABLE</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::sentence_problem</span><span class="plain-syntax">(</span><span class="identifier-syntax">Task::syntax_tree</span><span class="plain-syntax">(),</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_CantChangeScore</span><span class="plain-syntax">),</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"this is a story with no scoring"</span><span class="plain-syntax">,</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"so it makes no sense to change the 'score' value. You can add "</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"scoring to the story by including the sentence 'Use scoring.', "</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"in which case this problem message will go away; or you can "</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"remove it with 'Use no scoring.' (Until 2011, the default was "</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"to have scoring, but now it's not to have scoring.)"</span><span class="plain-syntax">);</span>
|
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<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> #</span><span class="identifier-syntax">endif</span>
|
|
<span class="plain-syntax">}</span>
|
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|
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::emit_lvalue</span><span class="plain-syntax">(</span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">nonlocal_variable_emission</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nve</span><span class="plain-syntax"> = &(</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">lvalue_nve</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">nve</span><span class="plain-syntax">-></span><span class="element-syntax">iname_form</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::val_iname</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">K_value</span><span class="plain-syntax">, </span><span class="identifier-syntax">nve</span><span class="plain-syntax">-></span><span class="element-syntax">iname_form</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">nve</span><span class="plain-syntax">-></span><span class="element-syntax">stv_ID</span><span class="plain-syntax"> >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::inv_primitive</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">LOOKUP_BIP</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::down</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">());</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::val_iname</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">K_value</span><span class="plain-syntax">, </span><a href="2-hrr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::find</span></a><span class="plain-syntax">(</span><span class="constant-syntax">MSTACK_HL</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">ex</span><span class="plain-syntax"> = </span><span class="constant-syntax">MSTVO_HL</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">nve</span><span class="plain-syntax">-></span><span class="element-syntax">allow_outside</span><span class="plain-syntax">) </span><span class="identifier-syntax">ex</span><span class="plain-syntax"> = </span><span class="constant-syntax">MSTVON_HL</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::inv_call_iname</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><a href="2-hrr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::find</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ex</span><span class="plain-syntax">));</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::down</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">());</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::val</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">K_number</span><span class="plain-syntax">, </span><span class="identifier-syntax">LITERAL_IVAL</span><span class="plain-syntax">, (</span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax">) </span><span class="identifier-syntax">nve</span><span class="plain-syntax">-></span><span class="element-syntax">stv_ID</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::val</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">K_number</span><span class="plain-syntax">, </span><span class="identifier-syntax">LITERAL_IVAL</span><span class="plain-syntax">, (</span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax">) </span><span class="identifier-syntax">nve</span><span class="plain-syntax">-></span><span class="element-syntax">stv_index</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::up</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">());</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::up</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">());</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">nve</span><span class="plain-syntax">-></span><span class="element-syntax">use_own_iname</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::val_iname</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">K_value</span><span class="plain-syntax">, </span><a href="4-vrb.html#SP4" class="function-link"><span class="function-syntax">RTVariables::iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">nlv</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">nve</span><span class="plain-syntax">-></span><span class="element-syntax">nothing_form</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::val_symbol</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">K_value</span><span class="plain-syntax">, </span><span class="identifier-syntax">Site::veneer_symbol</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">NOTHING_VSYMB</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">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"improperly formed nve"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::emit_all</span><span class="plain-syntax">(</span><span class="identifier-syntax">inference_subject_family</span><span class="plain-syntax"> *</span><span class="identifier-syntax">f</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">ignored</span><span class="plain-syntax">) {</span>
|
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<span class="plain-syntax"> </span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER</span><span class="plain-syntax">(</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">, </span><span class="identifier-syntax">nonlocal_variable</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">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">constant_at_run_time</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">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">housed_in_variables_array</span><span class="plain-syntax">)) {</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">BEGIN_COMPILATION_MODE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">COMPILATION_MODE_EXIT</span><span class="plain-syntax">(</span><span class="identifier-syntax">DEREFERENCE_POINTERS_CMODE</span><span class="plain-syntax">);</span>
|
|
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">iname</span><span class="plain-syntax"> = </span><a href="4-vrb.html#SP4" class="function-link"><span class="function-syntax">RTVariables::iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">v1</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">v2</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><a href="4-vrb.html#SP6" class="function-link"><span class="function-syntax">RTVariables::seek_initial_value</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">iname</span><span class="plain-syntax">, &</span><span class="identifier-syntax">v1</span><span class="plain-syntax">, &</span><span class="identifier-syntax">v2</span><span class="plain-syntax">, </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">);</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">END_COMPILATION_MODE</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">rvalue</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">compilation_data</span><span class="plain-syntax">.</span><span class="element-syntax">housed_in_variables_array</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">rvalue</span><span class="plain-syntax"> = </span><a href="4-vrb.html#SP3" class="function-link"><span class="function-syntax">RTVariables::get_identifier</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-emt.html#SP3" class="function-link"><span class="function-syntax">Emit::variable</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">iname</span><span class="plain-syntax">, </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">nlv_kind</span><span class="plain-syntax">, </span><span class="identifier-syntax">v1</span><span class="plain-syntax">, </span><span class="identifier-syntax">v2</span><span class="plain-syntax">, </span><span class="identifier-syntax">rvalue</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-vrb.html#SP5_1" class="named-paragraph-link"><span class="named-paragraph">Add any anomalous extras</span><span class="named-paragraph-number">5.1</span></a></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">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP5_1" class="paragraph-anchor"></a><b>§5.1. </b>Here, an inter routine is compiled which returns the current value of the
|
|
command prompt variable; see <a href="../CommandParserKit/S-prs.html" class="internal">Parser (in CommandParserKit)</a>.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Add any anomalous extras</span><span class="named-paragraph-number">5.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">nlv</span><span class="plain-syntax"> == </span><span class="identifier-syntax">command_prompt_VAR</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">iname</span><span class="plain-syntax"> = </span><a href="4-vrb.html#SP4" class="function-link"><span class="function-syntax">RTVariables::iname</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">cpt_iname</span><span class="plain-syntax"> = </span><a href="2-hrr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::find</span></a><span class="plain-syntax">(</span><span class="constant-syntax">COMMANDPROMPTTEXT_HL</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">packaging_state</span><span class="plain-syntax"> </span><span class="identifier-syntax">save</span><span class="plain-syntax"> = </span><a href="4-rtn.html#SP2" class="function-link"><span class="function-syntax">Routines::begin</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">cpt_iname</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::inv_primitive</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">RETURN_BIP</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::down</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">());</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::val_iname</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">K_text</span><span class="plain-syntax">, </span><span class="identifier-syntax">iname</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Produce::up</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">());</span>
|
|
<span class="plain-syntax"> </span><a href="4-rtn.html#SP5" class="function-link"><span class="function-syntax">Routines::end</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">save</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-hrr.html#SP4" class="function-link"><span class="function-syntax">Hierarchy::make_available</span></a><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), </span><span class="identifier-syntax">cpt_iname</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-vrb.html#SP5">§5</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP6" class="paragraph-anchor"></a><b>§6. </b>The following routine compiles the correct initial value for the given
|
|
variable. If it has no known initial value, it is given the initial
|
|
value for its kind where possible: note that this may not be possible
|
|
if the source text says something like
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>Thickness is a kind of value. The carpet nap is a thickness that varies.</p>
|
|
</blockquote>
|
|
|
|
<p class="commentary">without specifying any thicknesses: the set of legal thickness values
|
|
is empty, so the carpet nap variable cannot be created in a way
|
|
which makes its kind safe. Hence the error messages.
|
|
</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">RTVariables::emit_initial_value</span><button class="popup" onclick="togglePopup('usagePopup9')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup9">Usage of <span class="code-font"><span class="function-syntax">RTVariables::emit_initial_value</span></span>:<br/>The Player - <a href="5-tp.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">value_holster</span><span class="plain-syntax"> </span><span class="identifier-syntax">VH</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Holsters::new</span><span class="plain-syntax">(</span><span class="identifier-syntax">INTER_DATA_VHMODE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-vrb.html#SP6" class="function-link"><span class="function-syntax">RTVariables::compile_initial_value_vh</span></a><span class="plain-syntax">(&</span><span class="identifier-syntax">VH</span><span class="plain-syntax">, </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">v1</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">v2</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">Holsters::unholster_pair</span><span class="plain-syntax">(&</span><span class="identifier-syntax">VH</span><span class="plain-syntax">, &</span><span class="identifier-syntax">v1</span><span class="plain-syntax">, &</span><span class="identifier-syntax">v2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-emt.html#SP3" class="function-link"><span class="function-syntax">Emit::array_generic_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">v1</span><span class="plain-syntax">, </span><span class="identifier-syntax">v2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::emit_initial_value_as_val</span><span class="plain-syntax">(</span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">value_holster</span><span class="plain-syntax"> </span><span class="identifier-syntax">VH</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Holsters::new</span><span class="plain-syntax">(</span><span class="identifier-syntax">INTER_VAL_VHMODE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-vrb.html#SP6" class="function-link"><span class="function-syntax">RTVariables::compile_initial_value_vh</span></a><span class="plain-syntax">(&</span><span class="identifier-syntax">VH</span><span class="plain-syntax">, </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Holsters::to_val_mode</span><span class="plain-syntax">(</span><a href="2-emt.html#SP2" class="function-link"><span class="function-syntax">Emit::tree</span></a><span class="plain-syntax">(), &</span><span class="identifier-syntax">VH</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::seek_initial_value</span><button class="popup" onclick="togglePopup('usagePopup10')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup10">Usage of <span class="code-font"><span class="function-syntax">RTVariables::seek_initial_value</span></span>:<br/><a href="4-vrb.html#SP5">§5</a><br/>Bibliographic Data - <a href="5-bd.html#SP1_1">§1.1</a>, <a href="5-bd.html#SP1_2">§1.2</a>, <a href="5-bd.html#SP1_3">§1.3</a>, <a href="5-bd.html#SP1_4">§1.4</a><br/>The Score - <a href="5-ts.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inter_name</span><span class="plain-syntax"> *</span><span class="identifier-syntax">iname</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> *</span><span class="identifier-syntax">v1</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> *</span><span class="identifier-syntax">v2</span><span class="plain-syntax">, </span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">ival_emission</span><span class="plain-syntax"> </span><span class="identifier-syntax">IE</span><span class="plain-syntax"> = </span><a href="2-emt.html#SP4" class="function-link"><span class="function-syntax">Emit::begin_ival_emission</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">iname</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="4-vrb.html#SP6" class="function-link"><span class="function-syntax">RTVariables::compile_initial_value_vh</span></a><span class="plain-syntax">(</span><a href="2-emt.html#SP4" class="function-link"><span class="function-syntax">Emit::ival_holster</span></a><span class="plain-syntax">(&</span><span class="identifier-syntax">IE</span><span class="plain-syntax">), </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-emt.html#SP4" class="function-link"><span class="function-syntax">Emit::end_ival_emission</span></a><span class="plain-syntax">(&</span><span class="identifier-syntax">IE</span><span class="plain-syntax">, </span><span class="identifier-syntax">v1</span><span class="plain-syntax">, </span><span class="identifier-syntax">v2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">RTVariables::compile_initial_value_vh</span><span class="plain-syntax">(</span><span class="identifier-syntax">value_holster</span><span class="plain-syntax"> *</span><span class="identifier-syntax">VH</span><span class="plain-syntax">, </span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">nlv</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>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">NonlocalVariables::substitute_constants</span><span class="plain-syntax">(</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">VariableSubjects::get_initial_value</span><span class="plain-syntax">(</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">nlv</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">val</span><span class="plain-syntax">, </span><span class="identifier-syntax">UNKNOWN_NT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">current_sentence</span><span class="plain-syntax"> = </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">nlv_created_at</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-vrb.html#SP6_1" class="named-paragraph-link"><span class="named-paragraph">Initialise with the default value of its kind</span><span class="named-paragraph-number">6.1</span></a></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">current_sentence</span><span class="plain-syntax"> = </span><span class="identifier-syntax">VariableSubjects::origin_of_initial_value</span><span class="plain-syntax">(</span><span class="identifier-syntax">nlv</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">Lvalues::get_storage_form</span><span class="plain-syntax">(</span><span class="identifier-syntax">val</span><span class="plain-syntax">) == </span><span class="identifier-syntax">NONLOCAL_VARIABLE_NT</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="4-vrb.html#SP6_2" class="named-paragraph-link"><span class="named-paragraph">Issue a problem for one variable set equal to another</span><span class="named-paragraph-number">6.2</span></a></span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">Specifications::Compiler::compile_constant_to_kind_vh</span><span class="plain-syntax">(</span><span class="identifier-syntax">VH</span><span class="plain-syntax">, </span><span class="identifier-syntax">val</span><span class="plain-syntax">, </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">nlv_kind</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP6_1" class="paragraph-anchor"></a><b>§6.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Initialise with the default value of its kind</span><span class="named-paragraph-number">6.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="4-rsfk.html#SP5" class="function-link"><span class="function-syntax">RTKinds::compile_default_value_vh</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">VH</span><span class="plain-syntax">, </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">nlv_kind</span><span class="plain-syntax">, </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="element-syntax">name</span><span class="plain-syntax">, </span><span class="string-syntax">"variable"</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">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">var_is_allowed_to_be_zero</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Holsters::holster_pair</span><span class="plain-syntax">(</span><span class="identifier-syntax">VH</span><span class="plain-syntax">, </span><span class="identifier-syntax">LITERAL_IVAL</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">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">wording</span><span class="plain-syntax"> </span><span class="identifier-syntax">W</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Kinds::Behaviour::get_name</span><span class="plain-syntax">(</span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">nlv_kind</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_wording</span><span class="plain-syntax">(1, </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="element-syntax">name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_wording</span><span class="plain-syntax">(2, </span><span class="identifier-syntax">W</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::handmade_problem</span><span class="plain-syntax">(</span><span class="identifier-syntax">Task::syntax_tree</span><span class="plain-syntax">(), </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_EmptyDataType</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_segment</span><span class="plain-syntax">(</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"I am unable to put any value into the variable '%1', because "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"%2 is a kind of value with no actual values."</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_end</span><span class="plain-syntax">();</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="4-vrb.html#SP6">§6</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP6_2" class="paragraph-anchor"></a><b>§6.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Issue a problem for one variable set equal to another</span><span class="named-paragraph-number">6.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">nonlocal_variable</span><span class="plain-syntax"> *</span><span class="identifier-syntax">the_other</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Node::get_constant_nonlocal_variable</span><span class="plain-syntax">(</span><span class="identifier-syntax">val</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">the_other</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"Tried to compile initial value of variable as null variable"</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">the_other</span><span class="plain-syntax"> == </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_source</span><span class="plain-syntax">(1, </span><span class="identifier-syntax">current_sentence</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_wording</span><span class="plain-syntax">(2, </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="element-syntax">name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_kind</span><span class="plain-syntax">(3, </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">nlv_kind</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::handmade_problem</span><span class="plain-syntax">(</span><span class="identifier-syntax">Task::syntax_tree</span><span class="plain-syntax">(), </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_InitialiseQ2</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_segment</span><span class="plain-syntax">(</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"The sentence %1 tells me that '%2', which should be %3 "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"that varies, is to have an initial value equal to itself - "</span>
|
|
<span class="plain-syntax"> </span><span class="string-syntax">"this is such an odd thing to say that I think I must have "</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"misunderstood."</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_end</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="identifier-syntax">Problems::quote_source</span><span class="plain-syntax">(1, </span><span class="identifier-syntax">current_sentence</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_wording</span><span class="plain-syntax">(2, </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="element-syntax">name</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_kind</span><span class="plain-syntax">(3, </span><span class="identifier-syntax">nlv</span><span class="plain-syntax">-></span><span class="identifier-syntax">nlv_kind</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_wording</span><span class="plain-syntax">(4, </span><span class="identifier-syntax">the_other</span><span class="plain-syntax">-></span><span class="element-syntax">name</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::quote_kind</span><span class="plain-syntax">(5, </span><span class="identifier-syntax">the_other</span><span class="plain-syntax">-></span><span class="identifier-syntax">nlv_kind</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">StandardProblems::handmade_problem</span><span class="plain-syntax">(</span><span class="identifier-syntax">Task::syntax_tree</span><span class="plain-syntax">(), </span><span class="identifier-syntax">_p_</span><span class="plain-syntax">(</span><span class="identifier-syntax">PM_InitialiseQ1</span><span class="plain-syntax">));</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_segment</span><span class="plain-syntax">(</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"The sentence %1 tells me that '%2', which should be %3 "</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"that varies, is to have an initial value equal to '%4', "</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"which in turn is %5 that varies. At the start of play, "</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"variable values have to be set equal to definite constants, "</span>
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<span class="plain-syntax"> </span><span class="string-syntax">"so this is not allowed."</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">Problems::issue_problem_end</span><span class="plain-syntax">();</span>
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<span class="plain-syntax"> }</span>
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</pre>
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