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inform7/docs/inter-module/4-tac.html
Graham Nelson ab4646111b Made inter_symbol somewhat leaner
2019-07-26 08:59:23 +01:00

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<ul class="crumbs"><li><a href="../webs.html">&#9733;</a></li><li><a href="index.html">inter</a></li><li><a href="index.html#4">Chapter 4: Void Constructs</a></li><li><b>The Append Construct</b></li></ul><p class="purpose">Defining the append construct.</p>
<p class="inwebparagraph"><a id="SP1"></a><b>&#167;1. </b></p>
<pre class="definitions">
<span class="definitionkeyword">enum</span> <span class="constant">APPEND_IST</span>
</pre>
<pre class="display">
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Inter::Append::define</span><span class="plain">(</span><span class="reserved">void</span><span class="plain">) {</span>
<span class="reserved">inter_construct</span><span class="plain"> *</span><span class="identifier">IC</span><span class="plain"> = </span><span class="functiontext">Inter::Defn::create_construct</span><span class="plain">(</span>
<span class="constant">APPEND_IST</span><span class="plain">,</span>
<span class="identifier">L</span><span class="string">"append (%i+) \</span><span class="plain">"</span><span class="string">(%c+)\</span><span class="plain">"</span><span class="string">"</span><span class="plain">,</span>
<span class="identifier">I</span><span class="string">"append"</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"appends"</span><span class="plain">);</span>
<span class="identifier">METHOD_ADD</span><span class="plain">(</span><span class="identifier">IC</span><span class="plain">, </span><span class="constant">CONSTRUCT_READ_MTID</span><span class="plain">, </span><span class="functiontext">Inter::Append::read</span><span class="plain">);</span>
<span class="identifier">METHOD_ADD</span><span class="plain">(</span><span class="identifier">IC</span><span class="plain">, </span><span class="constant">CONSTRUCT_VERIFY_MTID</span><span class="plain">, </span><span class="functiontext">Inter::Append::verify</span><span class="plain">);</span>
<span class="identifier">METHOD_ADD</span><span class="plain">(</span><span class="identifier">IC</span><span class="plain">, </span><span class="constant">CONSTRUCT_WRITE_MTID</span><span class="plain">, </span><span class="functiontext">Inter::Append::write</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Inter::Append::define is used in 3/dfn (<a href="3-dfn.html#SP3">&#167;3</a>).</p>
<p class="inwebparagraph"><a id="SP2"></a><b>&#167;2. </b></p>
<pre class="definitions">
<span class="definitionkeyword">define</span> <span class="constant">SYMBOL_APPEND_IFLD</span><span class="plain"> 2</span>
<span class="definitionkeyword">define</span> <span class="constant">TEXT_APPEND_IFLD</span><span class="plain"> 3</span>
<span class="definitionkeyword">define</span> <span class="constant">EXTENT_APPEND_IFR</span><span class="plain"> 4</span>
</pre>
<pre class="display">
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Inter::Append::read</span><span class="plain">(</span><span class="reserved">inter_construct</span><span class="plain"> *</span><span class="identifier">IC</span><span class="plain">, </span><span class="reserved">inter_bookmark</span><span class="plain"> *</span><span class="identifier">IBM</span><span class="plain">, </span><span class="reserved">inter_line_parse</span><span class="plain"> *</span><span class="identifier">ilp</span><span class="plain">, </span><span class="reserved">inter_error_location</span><span class="plain"> *</span><span class="identifier">eloc</span><span class="plain">, </span><span class="reserved">inter_error_message</span><span class="plain"> **</span><span class="identifier">E</span><span class="plain">) {</span>
<span class="plain">*</span><span class="identifier">E</span><span class="plain"> = </span><span class="functiontext">Inter::Defn::vet_level</span><span class="plain">(</span><span class="identifier">IBM</span><span class="plain">, </span><span class="constant">APPEND_IST</span><span class="plain">, </span><span class="identifier">ilp</span><span class="plain">-</span><span class="element">&gt;indent_level</span><span class="plain">, </span><span class="identifier">eloc</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (*</span><span class="identifier">E</span><span class="plain">) </span><span class="reserved">return</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="functiontext">Inter::Annotations::exist</span><span class="plain">(&amp;(</span><span class="identifier">ilp</span><span class="plain">-</span><span class="element">&gt;set</span><span class="plain">))) {</span>
<span class="plain">*</span><span class="identifier">E</span><span class="plain"> = </span><span class="functiontext">Inter::Errors::plain</span><span class="plain">(</span><span class="identifier">I</span><span class="string">"__annotations are not allowed"</span><span class="plain">, </span><span class="identifier">eloc</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">symbol</span><span class="plain"> = </span><span class="functiontext">Inter::SymbolsTables::symbol_from_name</span><span class="plain">(</span><span class="functiontext">Inter::Bookmarks::scope</span><span class="plain">(</span><span class="identifier">IBM</span><span class="plain">), </span><span class="identifier">ilp</span><span class="plain">-</span><span class="element">&gt;mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[0]);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">symbol</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) {</span>
<span class="plain">*</span><span class="identifier">E</span><span class="plain"> = </span><span class="functiontext">Inter::Errors::plain</span><span class="plain">(</span><span class="identifier">I</span><span class="string">"no such symbol"</span><span class="plain">, </span><span class="identifier">eloc</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain">;</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="functiontext">Inter::Warehouse::create_text</span><span class="plain">(</span><span class="functiontext">Inter::Bookmarks::warehouse</span><span class="plain">(</span><span class="identifier">IBM</span><span class="plain">), </span><span class="functiontext">Inter::Bookmarks::package</span><span class="plain">(</span><span class="identifier">IBM</span><span class="plain">));</span>
<span class="plain">*</span><span class="identifier">E</span><span class="plain"> = </span><span class="functiontext">Inter::Constant::parse_text</span><span class="plain">(</span><span class="functiontext">Inter::Warehouse::get_text</span><span class="plain">(</span><span class="functiontext">Inter::Bookmarks::warehouse</span><span class="plain">(</span><span class="identifier">IBM</span><span class="plain">), </span><span class="identifier">ID</span><span class="plain">), </span><span class="identifier">ilp</span><span class="plain">-</span><span class="element">&gt;mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[1], 0, </span><span class="identifier">Str::len</span><span class="plain">(</span><span class="identifier">ilp</span><span class="plain">-</span><span class="element">&gt;mr</span><span class="plain">.</span><span class="identifier">exp</span><span class="plain">[1]), </span><span class="identifier">eloc</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (*</span><span class="identifier">E</span><span class="plain">) </span><span class="reserved">return</span><span class="plain">;</span>
<span class="plain">*</span><span class="identifier">E</span><span class="plain"> = </span><span class="functiontext">Inter::Append::new</span><span class="plain">(</span><span class="identifier">IBM</span><span class="plain">, </span><span class="identifier">symbol</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">ilp</span><span class="plain">-</span><span class="element">&gt;indent_level</span><span class="plain">, </span><span class="identifier">eloc</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="reserved">inter_error_message</span><span class="plain"> *</span><span class="functiontext">Inter::Append::new</span><span class="plain">(</span><span class="reserved">inter_bookmark</span><span class="plain"> *</span><span class="identifier">IBM</span><span class="plain">, </span><span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">symbol</span><span class="plain">, </span><span class="constant">inter_t</span><span class="plain"> </span><span class="identifier">append_text</span><span class="plain">, </span><span class="constant">inter_t</span><span class="plain"> </span><span class="identifier">level</span><span class="plain">, </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">inter_error_location</span><span class="plain"> *</span><span class="identifier">eloc</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="functiontext">Inter::Node::fill_2</span><span class="plain">(</span><span class="identifier">IBM</span><span class="plain">, </span><span class="constant">APPEND_IST</span><span class="plain">, </span><span class="functiontext">Inter::SymbolsTables::id_from_IRS_and_symbol</span><span class="plain">(</span><span class="identifier">IBM</span><span class="plain">, </span><span class="identifier">symbol</span><span class="plain">), </span><span class="identifier">append_text</span><span class="plain">, </span><span class="identifier">eloc</span><span class="plain">, </span><span class="identifier">level</span><span class="plain">);</span>
<span class="reserved">inter_error_message</span><span class="plain"> *</span><span class="identifier">E</span><span class="plain"> = </span><span class="functiontext">Inter::Defn::verify_construct</span><span class="plain">(</span><span class="functiontext">Inter::Bookmarks::package</span><span class="plain">(</span><span class="identifier">IBM</span><span class="plain">), </span><span class="identifier">P</span><span class="plain">); </span><span class="reserved">if</span><span class="plain"> (</span><span class="identifier">E</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">E</span><span class="plain">;</span>
<span class="functiontext">Inter::Bookmarks::insert</span><span class="plain">(</span><span class="identifier">IBM</span><span class="plain">, </span><span class="identifier">P</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Inter::Append::verify</span><span class="plain">(</span><span class="reserved">inter_construct</span><span class="plain"> *</span><span class="identifier">IC</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">inter_package</span><span class="plain"> *</span><span class="identifier">owner</span><span class="plain">, </span><span class="reserved">inter_error_message</span><span class="plain"> **</span><span class="identifier">E</span><span class="plain">) {</span>
<span class="constant">inter_t</span><span class="plain"> </span><span class="identifier">vcount</span><span class="plain"> = </span><span class="functiontext">Inter::Node::vcount</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">P</span><span class="plain">-</span><span class="element">&gt;W.extent</span><span class="plain"> != </span><span class="constant">EXTENT_APPEND_IFR</span><span class="plain">) { *</span><span class="identifier">E</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">"extent wrong"</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="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">symbol</span><span class="plain"> = </span><span class="functiontext">Inter::SymbolsTables::symbol_from_id</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><span class="identifier">P</span><span class="plain">-</span><span class="element">&gt;W.data</span><span class="plain">[</span><span class="constant">SYMBOL_APPEND_IFLD</span><span class="plain">]);;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">symbol</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) { *</span><span class="identifier">E</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 target name"</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="reserved">if</span><span class="plain"> (</span><span class="identifier">P</span><span class="plain">-</span><span class="element">&gt;W.data</span><span class="plain">[</span><span class="constant">TEXT_APPEND_IFLD</span><span class="plain">] == 0) { *</span><span class="identifier">E</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 translation text"</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="reserved">if</span><span class="plain"> (</span><span class="identifier">vcount</span><span class="plain"> == 0) {</span>
<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">&gt;W.data</span><span class="plain">[</span><span class="constant">TEXT_APPEND_IFLD</span><span class="plain">];</span>
<span class="identifier">text_stream</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain"> = </span><span class="functiontext">Inter::Node::ID_to_text</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">ID</span><span class="plain">);</span>
<span class="functiontext">Inter::Symbols::annotate_t</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">-</span><span class="element">&gt;tree</span><span class="plain">, </span><span class="identifier">P</span><span class="plain">-</span><span class="element">&gt;package</span><span class="plain">, </span><span class="identifier">symbol</span><span class="plain">, </span><span class="constant">APPEND_IANN</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="plain">}</span>
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Inter::Append::write</span><span class="plain">(</span><span class="reserved">inter_construct</span><span class="plain"> *</span><span class="identifier">IC</span><span class="plain">, </span><span class="identifier">OUTPUT_STREAM</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">inter_error_message</span><span class="plain"> **</span><span class="identifier">E</span><span class="plain">) {</span>
<span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">symbol</span><span class="plain"> = </span><span class="functiontext">Inter::SymbolsTables::symbol_from_frame_data</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="constant">SYMBOL_APPEND_IFLD</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="identifier">P</span><span class="plain">-</span><span class="element">&gt;W.data</span><span class="plain">[</span><span class="constant">TEXT_APPEND_IFLD</span><span class="plain">];</span>
<span class="identifier">text_stream</span><span class="plain"> *</span><span class="identifier">S</span><span class="plain"> = </span><span class="functiontext">Inter::Node::ID_to_text</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">ID</span><span class="plain">);</span>
<span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"append %S \</span><span class="plain">"</span><span class="string">"</span><span class="plain">, </span><span class="identifier">symbol</span><span class="plain">-</span><span class="element">&gt;symbol_name</span><span class="plain">);</span>
<span class="functiontext">Inter::Constant::write_text</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">S</span><span class="plain">);</span>
<span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"\</span><span class="plain">"</span><span class="string">"</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Inter::Append::read is used in <a href="#SP1">&#167;1</a>.</p>
<p class="endnote">The function Inter::Append::new appears nowhere else.</p>
<p class="endnote">The function Inter::Append::verify is used in <a href="#SP1">&#167;1</a>.</p>
<p class="endnote">The function Inter::Append::write is used in <a href="#SP1">&#167;1</a>.</p>
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