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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#5">Chapter 5: Code Constructs</a></li><li><b>The Local Construct</b></li></ul><p class="purpose">Defining the local 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">LOCAL_IST</span>
</pre>
<pre class="display">
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Inter::Local::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">LOCAL_IST</span><span class="plain">,</span>
<span class="identifier">L</span><span class="string">"local (%C+) (%c+)"</span><span class="plain">,</span>
<span class="identifier">I</span><span class="string">"local"</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"locals"</span><span class="plain">);</span>
<span class="identifier">IC</span><span class="plain">-</span><span class="element">&gt;min_level</span><span class="plain"> = 0;</span>
<span class="identifier">IC</span><span class="plain">-</span><span class="element">&gt;max_level</span><span class="plain"> = 0;</span>
<span class="identifier">IC</span><span class="plain">-</span><span class="element">&gt;usage_permissions</span><span class="plain"> = </span><span class="constant">INSIDE_CODE_PACKAGE</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::Local::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::Local::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::Local::write</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Inter::Local::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">BLOCK_LOCAL_IFLD</span><span class="plain"> 2</span>
<span class="definitionkeyword">define</span> <span class="constant">DEFN_LOCAL_IFLD</span><span class="plain"> 3</span>
<span class="definitionkeyword">define</span> <span class="constant">KIND_LOCAL_IFLD</span><span class="plain"> 4</span>
<span class="definitionkeyword">define</span> <span class="constant">EXTENT_LOCAL_IFR</span><span class="plain"> 5</span>
</pre>
<pre class="display">
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Inter::Local::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">LOCAL_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">inter_package</span><span class="plain"> *</span><span class="identifier">routine</span><span class="plain"> = </span><span class="functiontext">Inter::Defn::get_latest_block_package</span><span class="plain">();</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">routine</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::Errors::plain</span><span class="plain">(</span><span class="identifier">I</span><span class="string">"'local' used outside function"</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="reserved">inter_symbols_table</span><span class="plain"> *</span><span class="identifier">locals</span><span class="plain"> = </span><span class="functiontext">Inter::Packages::scope</span><span class="plain">(</span><span class="identifier">routine</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">locals</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::Errors::plain</span><span class="plain">(</span><span class="identifier">I</span><span class="string">"function has no symbols table"</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="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">var_name</span><span class="plain"> = </span><span class="functiontext">Inter::Textual::find_undefined_symbol</span><span class="plain">(</span><span class="identifier">IBM</span><span class="plain">, </span><span class="identifier">eloc</span><span class="plain">, </span><span class="identifier">locals</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="identifier">E</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::Symbols::get_scope</span><span class="plain">(</span><span class="identifier">var_name</span><span class="plain">) != </span><span class="constant">PRIVATE_ISYMS</span><span class="plain">) ||</span>
<span class="plain">(</span><span class="functiontext">Inter::Symbols::get_type</span><span class="plain">(</span><span class="identifier">var_name</span><span class="plain">) != </span><span class="constant">MISC_ISYMT</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">"symbol of wrong S-type"</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="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">var_kind</span><span class="plain"> = </span><span class="functiontext">Inter::Textual::find_symbol</span><span class="plain">(</span><span class="functiontext">Inter::Bookmarks::tree</span><span class="plain">(</span><span class="identifier">IBM</span><span class="plain">), </span><span class="identifier">eloc</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">[1], </span><span class="constant">KIND_IST</span><span class="plain">, </span><span class="identifier">E</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="functiontext">Inter::Annotations::copy_set_to_symbol</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="identifier">var_name</span><span class="plain">);</span>
<span class="plain">*</span><span class="identifier">E</span><span class="plain"> = </span><span class="functiontext">Inter::Local::new</span><span class="plain">(</span><span class="identifier">IBM</span><span class="plain">, </span><span class="identifier">var_name</span><span class="plain">, </span><span class="identifier">var_kind</span><span class="plain">, </span><span class="identifier">ilp</span><span class="plain">-</span><span class="element">&gt;terminal_comment</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::Local::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">var_name</span><span class="plain">, </span><span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">var_kind</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">level</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_3</span><span class="plain">(</span><span class="identifier">IBM</span><span class="plain">, </span><span class="constant">LOCAL_IST</span><span class="plain">, 0, </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">var_name</span><span class="plain">), </span><span class="identifier">var_kind</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">var_kind</span><span class="plain">)):0, </span><span class="identifier">eloc</span><span class="plain">, </span><span class="identifier">level</span><span class="plain">);</span>
<span class="functiontext">Inter::Node::attach_comment</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="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::Local::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="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_LOCAL_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_symbols_table</span><span class="plain"> *</span><span class="identifier">locals</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="reserved">if</span><span class="plain"> (</span><span class="identifier">locals</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 symbols table in function"</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="plain">*</span><span class="identifier">E</span><span class="plain"> = </span><span class="functiontext">Inter::Verify::local_defn</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="constant">DEFN_LOCAL_IFLD</span><span class="plain">, </span><span class="identifier">locals</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::Verify::symbol</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="identifier">P</span><span class="plain">-</span><span class="element">&gt;W.data</span><span class="plain">[</span><span class="constant">KIND_LOCAL_IFLD</span><span class="plain">], </span><span class="constant">KIND_IST</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="reserved">void</span><span class="plain"> </span><span class="functiontext">Inter::Local::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_package</span><span class="plain"> *</span><span class="identifier">pack</span><span class="plain"> = </span><span class="functiontext">Inter::Packages::container</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">);</span>
<span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">var_name</span><span class="plain"> = </span><span class="functiontext">Inter::SymbolsTables::local_symbol_from_id</span><span class="plain">(</span><span class="identifier">pack</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">DEFN_LOCAL_IFLD</span><span class="plain">]);</span>
<span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">var_kind</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">KIND_LOCAL_IFLD</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">var_name</span><span class="plain">) {</span>
<span class="identifier">WRITE</span><span class="plain">(</span><span class="string">"local %S %S"</span><span class="plain">, </span><span class="identifier">var_name</span><span class="plain">-</span><span class="element">&gt;symbol_name</span><span class="plain">, </span><span class="identifier">var_kind</span><span class="plain">-</span><span class="element">&gt;symbol_name</span><span class="plain">);</span>
<span class="functiontext">Inter::Symbols::write_annotations</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">var_name</span><span class="plain">);</span>
<span class="plain">} </span><span class="reserved">else</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">"cannot write local"</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="plain">}</span>
<span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="functiontext">Inter::Local::kind_of</span><span class="plain">(</span><span class="reserved">inter_symbol</span><span class="plain"> *</span><span class="identifier">con_symbol</span><span class="plain">) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">con_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="identifier">NULL</span><span class="plain">;</span>
<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">con_symbol</span><span class="plain">);</span>
<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="identifier">NULL</span><span class="plain">;</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">D</span><span class="plain">-</span><span class="element">&gt;W.data</span><span class="plain">[</span><span class="constant">ID_IFLD</span><span class="plain">] != </span><span class="constant">LOCAL_IST</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="reserved">return</span><span class="plain"> </span><span class="functiontext">Inter::SymbolsTables::symbol_from_frame_data</span><span class="plain">(</span><span class="identifier">D</span><span class="plain">, </span><span class="constant">KIND_LOCAL_IFLD</span><span class="plain">);</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function Inter::Local::read is used in <a href="#SP1">&#167;1</a>.</p>
<p class="endnote">The function Inter::Local::new appears nowhere else.</p>
<p class="endnote">The function Inter::Local::verify is used in <a href="#SP1">&#167;1</a>.</p>
<p class="endnote">The function Inter::Local::write is used in <a href="#SP1">&#167;1</a>.</p>
<p class="endnote">The function Inter::Local::kind_of is used in 3/idt (<a href="3-idt.html#SP2">&#167;2</a>, <a href="3-idt.html#SP3">&#167;3</a>).</p>
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