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<title>3/iitf</title>
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<!--Weave of '3/vi' generated by 7-->
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<ul class="crumbs"><li><a href="../webs.html">★</a></li><li><a href="index.html">inter</a></li><li><a href="index.html#3">Chapter 3: Language Definition</a></li><li><b>Verifying Inter</b></li></ul><p class="purpose">Verifying that a chunk of inter is correct and consistent.</p>
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<p class="inwebparagraph"><a id="SP1"></a><b>§1. </b></p>
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<pre class="display">
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<span class="reserved">inter_error_message</span><span class="plain"> *</span><span class="functiontext">Inter::Verify::defn</span><span class="plain">(</span><span class="reserved">inter_package</span><span class="plain"> *</span><span class="identifier">owner</span><span class="plain">, </span><span class="reserved">inter_tree_node</span><span class="plain"> *</span><span class="identifier">P</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">index</span><span class="plain">) {</span>
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<span class="reserved">inter_symbols_table</span><span class="plain"> *</span><span class="identifier">T</span><span class="plain"> = </span><span class="functiontext">Inter::Packages::scope</span><span class="plain">(</span><span class="identifier">owner</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">T</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="identifier">T</span><span class="plain"> = </span><span class="functiontext">Inter::Node::globals</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">);</span>
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<span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain"> = </span><span class="functiontext">Inter::SymbolsTables::unequated_symbol_from_id</span><span class="plain">(</span><span class="identifier">T</span><span class="plain">, </span><span class="identifier">P</span><span class="plain">-</span><span class="element">>W.data</span><span class="plain">[</span><span class="identifier">index</span><span class="plain">]);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">S</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"no symbol for ID (case 1)"</span><span class="plain">, </span><span class="identifier">NULL</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">S</span><span class="plain">-</span><span class="element">>equated_to</span><span class="plain">) {</span>
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<span class="identifier">LOG</span><span class="plain">(</span><span class="string">"This is $6 but $3 equates to $3 in $6\</span><span class="plain">n</span><span class="string">"</span><span class="plain">,</span>
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<span class="functiontext">Inter::Packages::container</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">), </span><span class="identifier">S</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">-</span><span class="element">>equated_to</span><span class="plain">, </span><span class="functiontext">Inter::Packages::container</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">-</span><span class="element">>equated_to</span><span class="plain">-</span><span class="element">>definition</span><span class="plain">));</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"symbol defined outside its native scope"</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">-</span><span class="element">>symbol_name</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="reserved">inter_tree_node</span><span class="plain"> *</span><span class="identifier">D</span><span class="plain"> = </span><span class="functiontext">Inter::Symbols::definition</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">D</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="functiontext">Inter::Symbols::define</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">, </span><span class="identifier">P</span><span class="plain">);</span>
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<span class="reserved">else</span><span class="plain"> </span><span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Inter::Node::eq</span><span class="plain">(</span><span class="identifier">D</span><span class="plain">, </span><span class="identifier">P</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Inter::Symbols::is_predeclared</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">)) {</span>
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<span class="functiontext">Inter::Symbols::define</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">, </span><span class="identifier">P</span><span class="plain">);</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"duplicated symbol"</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">-</span><span class="element">>symbol_name</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">inter_error_message</span><span class="plain"> *</span><span class="functiontext">Inter::Verify::local_defn</span><span class="plain">(</span><span class="reserved">inter_tree_node</span><span class="plain"> *</span><span class="identifier">P</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">index</span><span class="plain">, </span><span class="reserved">inter_symbols_table</span><span class="plain"> *</span><span class="identifier">T</span><span class="plain">) {</span>
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<span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain"> = </span><span class="functiontext">Inter::SymbolsTables::symbol_from_id</span><span class="plain">(</span><span class="identifier">T</span><span class="plain">, </span><span class="identifier">P</span><span class="plain">-</span><span class="element">>W.data</span><span class="plain">[</span><span class="identifier">index</span><span class="plain">]);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">S</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"no symbol for ID (case 2)"</span><span class="plain">, </span><span class="identifier">NULL</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="functiontext">Inter::Symbols::is_defined</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">)) &&</span>
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<span class="plain">(</span><span class="functiontext">Inter::Symbols::is_predeclared_local</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">))</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"duplicated local symbol"</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">-</span><span class="element">>symbol_name</span><span class="plain">);</span>
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<span class="functiontext">Inter::Symbols::define</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">, </span><span class="identifier">P</span><span class="plain">);</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">inter_error_message</span><span class="plain"> *</span><span class="functiontext">Inter::Verify::symbol</span><span class="plain">(</span><span class="reserved">inter_package</span><span class="plain"> *</span><span class="identifier">owner</span><span class="plain">, </span><span class="reserved">inter_tree_node</span><span class="plain"> *</span><span class="identifier">P</span><span class="plain">, </span><span class="constant">inter_t</span><span class="plain"> </span><span class="identifier">ID</span><span class="plain">, </span><span class="constant">inter_t</span><span class="plain"> </span><span class="identifier">construct</span><span class="plain">) {</span>
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<span class="reserved">inter_symbols_table</span><span class="plain"> *</span><span class="identifier">T</span><span class="plain"> = </span><span class="functiontext">Inter::Packages::scope</span><span class="plain">(</span><span class="identifier">owner</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">T</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="identifier">T</span><span class="plain"> = </span><span class="functiontext">Inter::Node::globals</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">);</span>
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<span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain"> = </span><span class="functiontext">Inter::SymbolsTables::symbol_from_id</span><span class="plain">(</span><span class="identifier">T</span><span class="plain">, </span><span class="identifier">ID</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">S</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"no symbol for ID (case 3)"</span><span class="plain">, </span><span class="identifier">NULL</span><span class="plain">);</span>
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<span class="reserved">inter_tree_node</span><span class="plain"> *</span><span class="identifier">D</span><span class="plain"> = </span><span class="functiontext">Inter::Symbols::definition</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Inter::Symbols::is_extern</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Inter::Symbols::is_predeclared</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">D</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"undefined symbol"</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">-</span><span class="element">>symbol_name</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">D</span><span class="plain">-</span><span class="element">>W.data</span><span class="plain">[</span><span class="constant">ID_IFLD</span><span class="plain">] != </span><span class="identifier">construct</span><span class="plain">) &&</span>
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<span class="plain">(</span><span class="functiontext">Inter::Symbols::is_extern</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">) &&</span>
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<span class="plain">(</span><span class="functiontext">Inter::Symbols::is_predeclared</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">)) {</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"symbol of wrong type"</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">-</span><span class="element">>symbol_name</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">inter_error_message</span><span class="plain"> *</span><span class="functiontext">Inter::Verify::global_symbol</span><span class="plain">(</span><span class="reserved">inter_tree_node</span><span class="plain"> *</span><span class="identifier">P</span><span class="plain">, </span><span class="constant">inter_t</span><span class="plain"> </span><span class="identifier">ID</span><span class="plain">, </span><span class="constant">inter_t</span><span class="plain"> </span><span class="identifier">construct</span><span class="plain">) {</span>
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<span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain"> = </span><span class="functiontext">Inter::SymbolsTables::symbol_from_id</span><span class="plain">(</span><span class="functiontext">Inter::Node::globals</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">), </span><span class="identifier">ID</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">S</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) { </span><span class="identifier">internal_error</span><span class="plain">(</span><span class="string">"IO"</span><span class="plain">); </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"3no symbol for ID"</span><span class="plain">, </span><span class="identifier">NULL</span><span class="plain">); }</span>
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<span class="reserved">inter_tree_node</span><span class="plain"> *</span><span class="identifier">D</span><span class="plain"> = </span><span class="functiontext">Inter::Symbols::definition</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Inter::Symbols::is_extern</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Inter::Symbols::is_predeclared</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">D</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"undefined symbol"</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">-</span><span class="element">>symbol_name</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">D</span><span class="plain">-</span><span class="element">>W.data</span><span class="plain">[</span><span class="constant">ID_IFLD</span><span class="plain">] != </span><span class="identifier">construct</span><span class="plain">) &&</span>
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<span class="plain">(</span><span class="functiontext">Inter::Symbols::is_extern</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">) &&</span>
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<span class="plain">(</span><span class="functiontext">Inter::Symbols::is_predeclared</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">)) {</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"symbol of wrong type"</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">-</span><span class="element">>symbol_name</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">inter_error_message</span><span class="plain"> *</span><span class="functiontext">Inter::Verify::local_symbol</span><span class="plain">(</span><span class="reserved">inter_tree_node</span><span class="plain"> *</span><span class="identifier">P</span><span class="plain">, </span><span class="constant">inter_t</span><span class="plain"> </span><span class="identifier">ID</span><span class="plain">, </span><span class="constant">inter_t</span><span class="plain"> </span><span class="identifier">construct</span><span class="plain">, </span><span class="reserved">inter_symbols_table</span><span class="plain"> *</span><span class="identifier">T</span><span class="plain">) {</span>
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<span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain"> = </span><span class="functiontext">Inter::SymbolsTables::symbol_from_id</span><span class="plain">(</span><span class="identifier">T</span><span class="plain">, </span><span class="identifier">ID</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">S</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"4no symbol for ID"</span><span class="plain">, </span><span class="identifier">NULL</span><span class="plain">);</span>
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<span class="reserved">inter_tree_node</span><span class="plain"> *</span><span class="identifier">D</span><span class="plain"> = </span><span class="functiontext">Inter::Symbols::definition</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Inter::Symbols::is_extern</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Inter::Symbols::is_predeclared</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">D</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"undefined symbol"</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">-</span><span class="element">>symbol_name</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">D</span><span class="plain">-</span><span class="element">>W.data</span><span class="plain">[</span><span class="constant">ID_IFLD</span><span class="plain">] != </span><span class="identifier">construct</span><span class="plain">) &&</span>
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<span class="plain">(</span><span class="functiontext">Inter::Symbols::is_extern</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">) &&</span>
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<span class="plain">(</span><span class="functiontext">Inter::Symbols::is_predeclared</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">)) {</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"symbol of wrong type"</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">-</span><span class="element">>symbol_name</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">inter_error_message</span><span class="plain"> *</span><span class="functiontext">Inter::Verify::symbol_KOI</span><span class="plain">(</span><span class="reserved">inter_package</span><span class="plain"> *</span><span class="identifier">owner</span><span class="plain">, </span><span class="reserved">inter_tree_node</span><span class="plain"> *</span><span class="identifier">P</span><span class="plain">, </span><span class="constant">inter_t</span><span class="plain"> </span><span class="identifier">ID</span><span class="plain">) {</span>
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<span class="reserved">inter_symbols_table</span><span class="plain"> *</span><span class="identifier">T</span><span class="plain"> = </span><span class="functiontext">Inter::Packages::scope</span><span class="plain">(</span><span class="identifier">owner</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">T</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="identifier">T</span><span class="plain"> = </span><span class="functiontext">Inter::Node::globals</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">);</span>
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<span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain"> = </span><span class="functiontext">Inter::SymbolsTables::symbol_from_id</span><span class="plain">(</span><span class="identifier">T</span><span class="plain">, </span><span class="identifier">ID</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">S</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"5no symbol for ID"</span><span class="plain">, </span><span class="identifier">NULL</span><span class="plain">);</span>
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<span class="reserved">inter_tree_node</span><span class="plain"> *</span><span class="identifier">D</span><span class="plain"> = </span><span class="functiontext">Inter::Symbols::definition</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Inter::Symbols::is_extern</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Inter::Symbols::is_predeclared</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">D</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"undefined symbol"</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">-</span><span class="element">>symbol_name</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">D</span><span class="plain">-</span><span class="element">>W.data</span><span class="plain">[</span><span class="constant">ID_IFLD</span><span class="plain">] != </span><span class="constant">KIND_IST</span><span class="plain">) &&</span>
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<span class="plain">(</span><span class="functiontext">Inter::Symbols::is_extern</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">) &&</span>
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<span class="plain">(</span><span class="identifier">D</span><span class="plain">-</span><span class="element">>W.data</span><span class="plain">[</span><span class="constant">ID_IFLD</span><span class="plain">] != </span><span class="constant">INSTANCE_IST</span><span class="plain">) &&</span>
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<span class="plain">(</span><span class="functiontext">Inter::Symbols::is_predeclared</span><span class="plain">(</span><span class="identifier">S</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"symbol of wrong type"</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">-</span><span class="element">>symbol_name</span><span class="plain">);</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">inter_error_message</span><span class="plain"> *</span><span class="functiontext">Inter::Verify::data_type</span><span class="plain">(</span><span class="reserved">inter_tree_node</span><span class="plain"> *</span><span class="identifier">P</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">index</span><span class="plain">) {</span>
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<span class="constant">inter_t</span><span class="plain"> </span><span class="identifier">ID</span><span class="plain"> = </span><span class="identifier">P</span><span class="plain">-</span><span class="element">>W.data</span><span class="plain">[</span><span class="identifier">index</span><span class="plain">];</span>
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<span class="reserved">inter_data_type</span><span class="plain"> *</span><span class="identifier">idt</span><span class="plain"> = </span><span class="functiontext">Inter::Types::find_by_ID</span><span class="plain">(</span><span class="identifier">ID</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">idt</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"unknown data type"</span><span class="plain">, </span><span class="identifier">NULL</span><span class="plain">);</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">inter_error_message</span><span class="plain"> *</span><span class="functiontext">Inter::Verify::value</span><span class="plain">(</span><span class="reserved">inter_package</span><span class="plain"> *</span><span class="identifier">owner</span><span class="plain">, </span><span class="reserved">inter_tree_node</span><span class="plain"> *</span><span class="identifier">P</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">index</span><span class="plain">, </span><span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">kind_symbol</span><span class="plain">) {</span>
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<span class="reserved">inter_symbols_table</span><span class="plain"> *</span><span class="identifier">T</span><span class="plain"> = </span><span class="functiontext">Inter::Packages::scope</span><span class="plain">(</span><span class="identifier">owner</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">T</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="identifier">T</span><span class="plain"> = </span><span class="functiontext">Inter::Node::globals</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">kind_symbol</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"unknown kind for value"</span><span class="plain">, </span><span class="identifier">NULL</span><span class="plain">);</span>
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<span class="constant">inter_t</span><span class="plain"> </span><span class="identifier">V1</span><span class="plain"> = </span><span class="identifier">P</span><span class="plain">-</span><span class="element">>W.data</span><span class="plain">[</span><span class="identifier">index</span><span class="plain">];</span>
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<span class="constant">inter_t</span><span class="plain"> </span><span class="identifier">V2</span><span class="plain"> = </span><span class="identifier">P</span><span class="plain">-</span><span class="element">>W.data</span><span class="plain">[</span><span class="identifier">index</span><span class="plain">+1];</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Types::verify</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">kind_symbol</span><span class="plain">, </span><span class="identifier">V1</span><span class="plain">, </span><span class="identifier">V2</span><span class="plain">, </span><span class="identifier">T</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="reserved">inter_error_message</span><span class="plain"> *</span><span class="functiontext">Inter::Verify::local_value</span><span class="plain">(</span><span class="reserved">inter_tree_node</span><span class="plain"> *</span><span class="identifier">P</span><span class="plain">, </span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">index</span><span class="plain">, </span><span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">kind_symbol</span><span class="plain">, </span><span class="reserved">inter_symbols_table</span><span class="plain"> *</span><span class="identifier">T</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">kind_symbol</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Node::error</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"unknown kind for value"</span><span class="plain">, </span><span class="identifier">NULL</span><span class="plain">);</span>
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<span class="constant">inter_t</span><span class="plain"> </span><span class="identifier">V1</span><span class="plain"> = </span><span class="identifier">P</span><span class="plain">-</span><span class="element">>W.data</span><span class="plain">[</span><span class="identifier">index</span><span class="plain">];</span>
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<span class="constant">inter_t</span><span class="plain"> </span><span class="identifier">V2</span><span class="plain"> = </span><span class="identifier">P</span><span class="plain">-</span><span class="element">>W.data</span><span class="plain">[</span><span class="identifier">index</span><span class="plain">+1];</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::Types::verify</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">kind_symbol</span><span class="plain">, </span><span class="identifier">V1</span><span class="plain">, </span><span class="identifier">V2</span><span class="plain">, </span><span class="identifier">T</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Inter::Verify::writer</span><span class="plain">(</span><span class="identifier">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">char</span><span class="plain"> *</span><span class="identifier">format_string</span><span class="plain">, </span><span class="reserved">void</span><span class="plain"> *</span><span class="identifier">vI</span><span class="plain">) {</span>
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<span class="reserved">inter_tree_node</span><span class="plain"> *</span><span class="identifier">F</span><span class="plain"> = (</span><span class="reserved">inter_tree_node</span><span class="plain"> *) </span><span class="identifier">vI</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">F</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) { </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"<no frame>"</span><span class="plain">); </span><span class="reserved">return</span><span class="plain">; }</span>
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<span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"%05d -> "</span><span class="plain">, </span><span class="identifier">F</span><span class="plain">-</span><span class="element">>W.index</span><span class="plain">);</span>
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<span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"%d {"</span><span class="plain">, </span><span class="identifier">F</span><span class="plain">-</span><span class="element">>W.extent</span><span class="plain">);</span>
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<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">i</span><span class="plain">=0; </span><span class="identifier">i</span><span class="plain"><</span><span class="identifier">F</span><span class="plain">-</span><span class="element">>W.extent</span><span class="plain">; </span><span class="identifier">i</span><span class="plain">++) </span><span class="identifier">WRITE</span><span class="plain">(</span><span class="string">" %08x"</span><span class="plain">, </span><span class="identifier">F</span><span class="plain">-</span><span class="element">>W.data</span><span class="plain">[</span><span class="identifier">i</span><span class="plain">]);</span>
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<span class="identifier">WRITE</span><span class="plain">(</span><span class="string">" }"</span><span class="plain">);</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function Inter::Verify::defn is used in 4/tmc (<a href="4-tmc.html#SP2">§2</a>), 4/tpc2 (<a href="4-tpc2.html#SP2">§2</a>), 4/tkc (<a href="4-tkc.html#SP2">§2</a>), 4/tvc2 (<a href="4-tvc2.html#SP2">§2</a>), 4/tcc2 (<a href="4-tcc2.html#SP2">§2</a>), 4/trc (<a href="4-trc.html#SP2">§2</a>), 4/tic (<a href="4-tic.html#SP2">§2</a>), 4/tpc4 (<a href="4-tpc4.html#SP2">§2</a>), 4/tpc6 (<a href="4-tpc6.html#SP2">§2</a>), 4/tpc7 (<a href="4-tpc7.html#SP2">§2</a>).</p>
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<p class="endnote">The function Inter::Verify::local_defn is used in 5/tlc (<a href="5-tlc.html#SP2">§2</a>), 5/tlc2 (<a href="5-tlc2.html#SP2">§2</a>).</p>
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<p class="endnote">The function Inter::Verify::symbol is used in 4/tkc (<a href="4-tkc.html#SP2">§2</a>), 4/tdc (<a href="4-tdc.html#SP2">§2</a>), 4/tvc2 (<a href="4-tvc2.html#SP2">§2</a>), 4/tcc2 (<a href="4-tcc2.html#SP2">§2</a>), 4/tic (<a href="4-tic.html#SP2">§2</a>), 4/tpc4 (<a href="4-tpc4.html#SP2">§2</a>), 4/tpc5 (<a href="4-tpc5.html#SP2">§2</a>), 4/tpc6 (<a href="4-tpc6.html#SP2">§2</a>), 5/tlc2 (<a href="5-tlc2.html#SP2">§2</a>), 5/trc (<a href="5-trc.html#SP2">§2</a>), 5/tvc (<a href="5-tvc.html#SP2">§2</a>), 5/tcc2 (<a href="5-tcc2.html#SP2">§2</a>).</p>
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<p class="endnote">The function Inter::Verify::global_symbol is used in 5/tic (<a href="5-tic.html#SP2">§2</a>).</p>
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<p class="endnote">The function Inter::Verify::local_symbol appears nowhere else.</p>
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<p class="endnote">The function Inter::Verify::symbol_KOI is used in 4/tpc5 (<a href="4-tpc5.html#SP2">§2</a>), 4/tpc6 (<a href="4-tpc6.html#SP2">§2</a>).</p>
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<p class="endnote">The function Inter::Verify::data_type is used in 4/tkc (<a href="4-tkc.html#SP2">§2</a>).</p>
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<p class="endnote">The function Inter::Verify::value is used in 4/tcc2 (<a href="4-tcc2.html#SP2">§2</a>), 4/tic (<a href="4-tic.html#SP2">§2</a>).</p>
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<p class="endnote">The function Inter::Verify::local_value is used in 5/trc (<a href="5-trc.html#SP2">§2</a>), 5/tvc (<a href="5-tvc.html#SP2">§2</a>).</p>
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<p class="endnote">The function Inter::Verify::writer is used in 1/im (<a href="1-im.html#SP3_3">§3.3</a>).</p>
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