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<p class="purpose">To generate the initial state of storage for instances and their properties, and all associated metadata.</p>
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<ul class="toc"><li><a href="2-iap.html#SP2">§2. Representing instances in I6</a></li><li><a href="2-iap.html#SP3">§3. Representing properties in I6</a></li><li><a href="2-iap.html#SP4">§4. Properties</a></li><li><a href="2-iap.html#SP5_7">§5.7. The kind inheritance tree</a></li><li><a href="2-iap.html#SP5_8">§5.8. Lookup mechanism for properties of value instances</a></li><li><a href="2-iap.html#SP6">§6. Instances</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">properties_written</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">FBNA_found</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">properties_found</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">attribute_slots_used</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">no_property_frames</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> **</span><span class="identifier-syntax">property_frames</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> **</span><span class="identifier-syntax">instance_frames</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> **</span><span class="identifier-syntax">kind_frames</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">typedef</span><span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="reserved-syntax">kov_value_stick</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">identifier</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">struct</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">node</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">CLASS_DEFINITION</span>
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<span class="plain-syntax">} </span><span class="reserved-syntax">kov_value_stick</span><span class="plain-syntax">;</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::prepare</span><button class="popup" onclick="togglePopup('usagePopup1')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup1">Usage of <span class="code-font"><span class="function-syntax">CodeGen::IP::prepare</span></span>:<br/>Code Generation - <a href="2-cg.html#SP8_1">§8.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">properties_written</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">FBNA_found</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">properties_found</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">attribute_slots_used</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">no_property_frames</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">InterTree::traverse</span><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">-></span><span class="element-syntax">from</span><span class="plain-syntax">, </span><a href="2-iap.html#SP1" class="function-link"><span class="function-syntax">CodeGen::IP::count</span></a><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">no_property_frames</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">property_frames</span><span class="plain-syntax"> = (</span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> **)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">Memory::calloc</span><span class="plain-syntax">(</span><span class="identifier-syntax">no_property_frames</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *), </span><span class="constant-syntax">CODE_GENERATION_MREASON</span><span class="plain-syntax">));</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">instance_frames</span><span class="plain-syntax"> = (</span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> **)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">Memory::calloc</span><span class="plain-syntax">(</span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *), </span><span class="constant-syntax">CODE_GENERATION_MREASON</span><span class="plain-syntax">));</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">)</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">kind_frames</span><span class="plain-syntax"> = (</span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> **)</span>
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<span class="plain-syntax"> (</span><span class="identifier-syntax">Memory::calloc</span><span class="plain-syntax">(</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *), </span><span class="constant-syntax">CODE_GENERATION_MREASON</span><span class="plain-syntax">));</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">no_property_frames</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">; </span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">InterTree::traverse</span><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">-></span><span class="element-syntax">from</span><span class="plain-syntax">, </span><a href="2-iap.html#SP1" class="function-link"><span class="function-syntax">CodeGen::IP::store</span></a><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::count</span><span class="plain-syntax">(</span><span class="identifier-syntax">inter_tree</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="reserved-syntax">void</span><span class="plain-syntax"> *</span><span class="identifier-syntax">state</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">ID_IFLD</span><span class="plain-syntax">] == </span><span class="identifier-syntax">PROPERTY_IST</span><span class="plain-syntax">) </span><span class="identifier-syntax">no_property_frames</span><span class="plain-syntax">++;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">ID_IFLD</span><span class="plain-syntax">] == </span><span class="identifier-syntax">INSTANCE_IST</span><span class="plain-syntax">) </span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax">++;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">ID_IFLD</span><span class="plain-syntax">] == </span><span class="identifier-syntax">KIND_IST</span><span class="plain-syntax">) </span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">++;</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::store</span><span class="plain-syntax">(</span><span class="identifier-syntax">inter_tree</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="reserved-syntax">void</span><span class="plain-syntax"> *</span><span class="identifier-syntax">state</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">ID_IFLD</span><span class="plain-syntax">] == </span><span class="identifier-syntax">PROPERTY_IST</span><span class="plain-syntax">) </span><span class="identifier-syntax">property_frames</span><span class="plain-syntax">[</span><span class="identifier-syntax">no_property_frames</span><span class="plain-syntax">++] = </span><span class="identifier-syntax">P</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">ID_IFLD</span><span class="plain-syntax">] == </span><span class="identifier-syntax">INSTANCE_IST</span><span class="plain-syntax">) </span><span class="identifier-syntax">instance_frames</span><span class="plain-syntax">[</span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax">++] = </span><span class="identifier-syntax">P</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">P</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">ID_IFLD</span><span class="plain-syntax">] == </span><span class="identifier-syntax">KIND_IST</span><span class="plain-syntax">) </span><span class="identifier-syntax">kind_frames</span><span class="plain-syntax">[</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">++] = </span><span class="identifier-syntax">P</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::write_properties</span><button class="popup" onclick="togglePopup('usagePopup2')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup2">Usage of <span class="code-font"><span class="function-syntax">CodeGen::IP::write_properties</span></span>:<br/>Code Generation - <a href="2-cg.html#SP8_3">§8.3</a><br/>Frame Control - <a href="2-fc.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">properties_written</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">generated_segment</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP5" class="function-link"><span class="function-syntax">CodeGen::select</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-ft.html#SP4" class="function-link"><span class="function-syntax">CodeGen::Targets::default_segment</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">));</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-cal.html#SP1" class="function-link"><span class="function-syntax">CodeGen::CL::quartet_present</span></a><span class="plain-syntax">())</span>
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<span class="plain-syntax"> </span><a href="2-ft.html#SP19" class="function-link"><span class="function-syntax">CodeGen::Targets::world_model_essentials</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-iap.html#SP5" class="function-link"><span class="function-syntax">CodeGen::IP::knowledge</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP5" class="function-link"><span class="function-syntax">CodeGen::deselect</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">saved</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">properties_written</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>The structure kov_value_stick is accessed in 5/clt and here.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. Representing instances in I6. </b>Partly for historical reasons, partly to squeeze performance out of the
|
|
virtual machines used in traditional parser IF, the I6 run-time
|
|
implementation of instances and their properties is complicated.
|
|
</p>
|
|
|
|
<p class="commentary">The main complication is that there are two sorts of instance: objects,
|
|
such as doors and people, and everything else, such as scenes. The two
|
|
sorts are handled equally in Inter, but have completely different run-time
|
|
representations in I6:
|
|
</p>
|
|
|
|
<ul class="items"><li>(a) "Object instances" are instances of a kind which is a subkind, perhaps
|
|
indirectly, of "object". These are stored as I6 objects, and the I6 classes
|
|
of these objects correspond exactly to their I7 kinds (except that the kind
|
|
"object" itself is mapped to the I6 class "Class").
|
|
</li><li>(b) "Value instances" are instances of kinds which are not objects but can
|
|
nevertheless have properties. The scene "entire game" is a value instance; the
|
|
number 27 is not. Value instances are stored as enumerated constants. For
|
|
example, if there are scenes called "entire game", "Overture" and "Grand
|
|
Finale", then these are stored as the constants 1, 2, 3; and I6 constants are
|
|
defined to represent them.
|
|
</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>§3. Representing properties in I6. </b>Both sorts of instance can have properties; for example:
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>A supporter has a number called carrying capacity.</p>
|
|
</blockquote>
|
|
|
|
<blockquote>
|
|
<p>A scene has a number called completion score.</p>
|
|
</blockquote>
|
|
|
|
<p class="commentary">allows a property to be held by object instances (supporters) and value
|
|
instances (scenes). To the writer of I7 source text, no distinction between
|
|
these cases is visible, and the same is true of Inter code.
|
|
</p>
|
|
|
|
<p class="commentary">How to store these at run-time is not so straightforward. Speed and
|
|
compactness are unusually important here, and constraints imposed by the
|
|
virtual machine targeted by I6 add further complications.
|
|
</p>
|
|
|
|
<ul class="items"><li>(a) Properties of object instances are stored as either I6 properties or I6
|
|
attributes of their I6 objects. As far as possible, this is a direct mapping
|
|
from I7 instances and kinds onto I6 objects and classes. It is a little
|
|
bulkier in memory than using flat arrays, but the Glulx and Z-machine virtual
|
|
machines offer a very rapid lookup operation. Thus "the carrying capacity of
|
|
the player" can be compiled to the I6 expression <span class="extract"><span class="extract-syntax">player.capacity</span></span>, which
|
|
compiles to a single short call to the I6 veneer — and one which many
|
|
interpreters today have optimised out as a basic operation, taking only a
|
|
single VM clock cycle.
|
|
</li><li>(b) The properties of value instances are stored in flat arrays called
|
|
"sticks", with each property having its own stick. For example, the property
|
|
"recurring" for a scene would have a stick holding three values, one each for
|
|
the three scenes. Sticks have the same run-time format as table columns and
|
|
this is not a coincidence, because some kinds of value instances are created
|
|
by table in I7, and this lets us use the table as a ready-made set of sticks.
|
|
But now we don't have run-time lookup mechanisms already provided for us, so
|
|
we will need to set up some metadata structures to make it possible to seek
|
|
property values for value instances quickly.
|
|
</li></ul>
|
|
<p class="commentary">In practice, property access is slightly faster for object instances, and
|
|
property storage is slightly more compact for value instances, which is
|
|
probably the right bargain.
|
|
</p>
|
|
|
|
<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>§4. Properties. </b>Properties in I7 are of two sorts: either-or, which behave adjectivally,
|
|
such as "open"; and value, which behave as nouns, such as "carrying capacity".
|
|
We can distinguish these because the I7 compiler annotates the property name
|
|
symbols with the <span class="extract"><span class="extract-syntax">EITHER_OR_IANN</span></span> flag. It also always gives either-or
|
|
properties the kind <span class="extract"><span class="extract-syntax">K_truth_state</span></span>, but note that a few value properties
|
|
also have this kind, so the annotation is the only way to be sure.
|
|
</p>
|
|
|
|
<p class="commentary">Some either-or properties of object instances can be stored as I6
|
|
"attributes". This is memory-efficient and fast at run-time: but only a
|
|
limited number can be stored this way. Here we choose which.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::property</span><button class="popup" onclick="togglePopup('usagePopup3')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup3">Usage of <span class="code-font"><span class="function-syntax">CodeGen::IP::property</span></span>:<br/><a href="2-iap.html#SP5_1">§5.1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inter_tree</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"bad property"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">EITHER_OR_IANN</span><span class="plain-syntax">) >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">translated</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">EXPLICIT_ATTRIBUTE_IANN</span><span class="plain-syntax">) >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">translated</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">ASSIMILATED_IANN</span><span class="plain-syntax">) >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">translated</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">make_attribute</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NOT_APPLICABLE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP4_1" class="named-paragraph-link"><span class="named-paragraph">Any either/or property which can belong to a value instance is ineligible</span><span class="named-paragraph-number">4.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP4_2" class="named-paragraph-link"><span class="named-paragraph">An either/or property translated to an attribute declared in the I6 template must be chosen</span><span class="named-paragraph-number">4.2</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP4_3" class="named-paragraph-link"><span class="named-paragraph">Otherwise give away attribute slots on a first-come-first-served basis</span><span class="named-paragraph-number">4.3</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">make_attribute</span><span class="plain-syntax"> == </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">) </span><span class="identifier-syntax">Inter::Symbols::set_flag</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">ATTRIBUTE_MARK_BIT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP4_4" class="named-paragraph-link"><span class="named-paragraph">Check against the I7 compiler's beliefs</span><span class="named-paragraph-number">4.4</span></a></span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">make_attribute</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP4_5" class="named-paragraph-link"><span class="named-paragraph">Declare as an I6 attribute</span><span class="named-paragraph-number">4.5</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP4_6" class="named-paragraph-link"><span class="named-paragraph">Worry about the FBNA</span><span class="named-paragraph-number">4.6</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP4_1" class="paragraph-anchor"></a><b>§4.1. </b>The dodge of using an attribute to store an either-or property won't work
|
|
for properties of value instances, because then the value-property-holder
|
|
object couldn't store the necessary table address (see next section). So we
|
|
must rule out any property which might belong to any value.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Any either/or property which can belong to a value instance is ineligible</span><span class="named-paragraph-number">4.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_node_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">PL</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Inter::Warehouse::get_frame_list</span><span class="plain-syntax">(</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">InterTree::warehouse</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Inter::Property::permissions_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">PL</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"no permissions list"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">X</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_INTER_NODE_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">PL</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">owner_name</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_id</span><span class="plain-syntax">(</span><span class="identifier-syntax">Inter::Packages::scope_of</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">), </span><span class="identifier-syntax">X</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">OWNER_PERM_IFLD</span><span class="plain-syntax">]);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">owner_name</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"bad owner"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">owner_kind</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">D</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Symbols::definition</span><span class="plain-syntax">(</span><span class="identifier-syntax">owner_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">D</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">D</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">ID_IFLD</span><span class="plain-syntax">] == </span><span class="identifier-syntax">INSTANCE_IST</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">owner_kind</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Instance::kind_of</span><span class="plain-syntax">(</span><span class="identifier-syntax">owner_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">owner_kind</span><span class="plain-syntax"> = </span><span class="identifier-syntax">owner_name</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-iap.html#SP9" class="function-link"><span class="function-syntax">CodeGen::IP::is_kind_of_object</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">owner_kind</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) </span><span class="identifier-syntax">make_attribute</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP4">§4</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP4_2" class="paragraph-anchor"></a><b>§4.2. </b>An either/or property which has been deliberately equated to an I6
|
|
template attribute with a sentence like...
|
|
</p>
|
|
|
|
<blockquote>
|
|
<p>The fixed in place property translates into I6 as "static".</p>
|
|
</blockquote>
|
|
|
|
<p class="commentary">...is (we must assume) already declared as an <span class="extract"><span class="extract-syntax">Attribute</span></span>, so we need to
|
|
remember that it's implemented as an attribute when compiling references
|
|
to it.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">An either/or property translated to an attribute declared in the I6 template must be chosen</span><span class="named-paragraph-number">4.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">translated</span><span class="plain-syntax">) </span><span class="identifier-syntax">make_attribute</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP4">§4</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP4_3" class="paragraph-anchor"></a><b>§4.3. </b>We have in theory 48 Attribute slots to use up, that being the number
|
|
available in versions 5 and higher of the Z-machine, but the I6 template
|
|
layer consumes so many that only a few slots remain for the user's own
|
|
creations. Giving these away to the first-created properties is the
|
|
simplest way to allocate them, and in fact it works pretty well, because
|
|
the first such either/or properties tend to be created in extensions and
|
|
to be frequently used.
|
|
</p>
|
|
|
|
<pre class="definitions code-font"><span class="definition-keyword">define</span> <span class="constant-syntax">ATTRIBUTE_SLOTS_TO_GIVE_AWAY</span><span class="plain-syntax"> </span><span class="constant-syntax">11</span>
|
|
</pre>
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Otherwise give away attribute slots on a first-come-first-served basis</span><span class="named-paragraph-number">4.3</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">make_attribute</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NOT_APPLICABLE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">attribute_slots_used</span><span class="plain-syntax">++ < </span><span class="constant-syntax">ATTRIBUTE_SLOTS_TO_GIVE_AWAY</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">make_attribute</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">make_attribute</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP4">§4</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP4_4" class="paragraph-anchor"></a><b>§4.4. </b>At present the I7 compiler makes a decision matching this one for its
|
|
own internal needs. We want to make sure its decision matches ours, so we
|
|
check that here. (It tells us by marking the property name with the
|
|
<span class="extract"><span class="extract-syntax">ATTRIBUTE_IANN</span></span> annotation.) But this code will eventually go.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Check against the I7 compiler's beliefs</span><span class="named-paragraph-number">4.4</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">made_attribute</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">ATTRIBUTE_IANN</span><span class="plain-syntax">) >= </span><span class="constant-syntax">0</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">made_attribute</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">made_attribute</span><span class="plain-syntax"> != </span><span class="identifier-syntax">make_attribute</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"Disagree on %S: %d vs %d\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">-></span><span class="identifier-syntax">symbol_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">made_attribute</span><span class="plain-syntax">, </span><span class="identifier-syntax">make_attribute</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"attribute allocation dispute"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP4">§4</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP4_5" class="paragraph-anchor"></a><b>§4.5. </b>A curiosity of I6 is that attributes must be declared before use, whereas
|
|
properties need not be. We generate suitable <span class="extract"><span class="extract-syntax">Attribute</span></span> statements here.
|
|
Note that if the property has been translated onto an existing I6 name, then
|
|
we assume that's the name of an attribute already declared (for example
|
|
in the I6 template, or some extension), and we therefore do nothing.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Declare as an I6 attribute</span><span class="named-paragraph-number">4.5</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">generated_segment</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP5" class="function-link"><span class="function-syntax">CodeGen::select</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-ft.html#SP4" class="function-link"><span class="function-syntax">CodeGen::Targets::basic_constant_segment</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">ASSIMILATED_IANN</span><span class="plain-syntax">) >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">A</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Symbols::get_translate</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">A</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">A</span><span class="plain-syntax"> = </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP10" class="function-link"><span class="function-syntax">CodeGen::Targets::declare_attribute</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">A</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">translated</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP10" class="function-link"><span class="function-syntax">CodeGen::Targets::declare_attribute</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP5" class="function-link"><span class="function-syntax">CodeGen::deselect</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">saved</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP4">§4</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP4_6" class="paragraph-anchor"></a><b>§4.6. </b>The weak point in our scheme for making some either/or properties into
|
|
Attributes is that run-time code is going to need a fast way to determine
|
|
which, since they have to be accessed differently. We rely on the facts that
|
|
</p>
|
|
|
|
<ul class="items"><li>(a) at run-time, attribute numbers are all numerically lower than property
|
|
numbers, and
|
|
</li><li>(b) property numbers increase in order of their first appearances in the
|
|
I6 source code.
|
|
</li></ul>
|
|
<p class="commentary">Thus an either/or property <span class="extract"><span class="extract-syntax">P</span></span> must be an I6 attribute if <span class="extract"><span class="extract-syntax">P < F</span></span> and must be
|
|
an I6 property if <span class="extract"><span class="extract-syntax">P >= F</span></span>, where <span class="extract"><span class="extract-syntax">F</span></span> is the earliest-defined either/or
|
|
property which isn't stored as an attribute.
|
|
</p>
|
|
|
|
<p class="commentary">This cutoff value <span class="extract"><span class="extract-syntax">F</span></span> is customarily called FBNA, the "first boolean not
|
|
an attribute". (Perhaps she ought to be called FEONA.) The following
|
|
compiles an I6 constant for this value.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Worry about the FBNA</span><span class="named-paragraph-number">4.6</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">FBNA_found</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">FBNA_found</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">generated_segment</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP5" class="function-link"><span class="function-syntax">CodeGen::select</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-ft.html#SP4" class="function-link"><span class="function-syntax">CodeGen::Targets::constant_segment</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP14" class="function-link"><span class="function-syntax">CodeGen::Targets::begin_constant</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"FBNA_PROP_NUMBER"</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP5" class="function-link"><span class="function-syntax">CodeGen::Targets::mangle</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-cg.html#SP7" class="function-link"><span class="function-syntax">CodeGen::current</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">), </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP14" class="function-link"><span class="function-syntax">CodeGen::Targets::end_constant</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"FBNA_PROP_NUMBER"</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP5" class="function-link"><span class="function-syntax">CodeGen::deselect</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">saved</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP4">§4</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5" class="paragraph-anchor"></a><b>§5. </b>It's unlikely, but just possible, that no FBNAs ever exist, so after the
|
|
above has been tried on all properties:
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::knowledge</span><button class="popup" onclick="togglePopup('usagePopup4')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup4">Usage of <span class="code-font"><span class="function-syntax">CodeGen::IP::knowledge</span></span>:<br/><a href="2-iap.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP7" class="function-link"><span class="function-syntax">CodeGen::current</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax"> = </span><span class="identifier-syntax">gen</span><span class="plain-syntax">-></span><span class="element-syntax">from</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">FBNA_found</span><span class="plain-syntax"> == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">properties_found</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">generated_segment</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP5" class="function-link"><span class="function-syntax">CodeGen::select</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-ft.html#SP4" class="function-link"><span class="function-syntax">CodeGen::Targets::constant_segment</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP14" class="function-link"><span class="function-syntax">CodeGen::Targets::begin_constant</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"FBNA_PROP_NUMBER"</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><a href="2-cg.html#SP7" class="function-link"><span class="function-syntax">CodeGen::current</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">), </span><span class="string-syntax">"MAX_POSITIVE_NUMBER"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP14" class="function-link"><span class="function-syntax">CodeGen::Targets::end_constant</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"FBNA_PROP_NUMBER"</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP5" class="function-link"><span class="function-syntax">CodeGen::deselect</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">saved</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **</span><span class="identifier-syntax">all_props_in_source_order</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **</span><span class="identifier-syntax">props_in_source_order</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">no_properties</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">total_no_properties</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_1" class="named-paragraph-link"><span class="named-paragraph">Make a list of properties in source order</span><span class="named-paragraph-number">5.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_5" class="named-paragraph-link"><span class="named-paragraph">Compile the property numberspace forcer</span><span class="named-paragraph-number">5.5</span></a></span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **</span><span class="identifier-syntax">kinds_in_source_order</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **</span><span class="identifier-syntax">kinds_in_declaration_order</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_2" class="named-paragraph-link"><span class="named-paragraph">Make a list of kinds in source order</span><span class="named-paragraph-number">5.2</span></a></span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **</span><span class="identifier-syntax">instances_in_declaration_order</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_4" class="named-paragraph-link"><span class="named-paragraph">Make a list of instances in declaration order</span><span class="named-paragraph-number">5.4</span></a></span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">properties_found</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_8" class="named-paragraph-link"><span class="named-paragraph">Write Value Property Holder objects for each kind of value instance</span><span class="named-paragraph-number">5.8</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_3" class="named-paragraph-link"><span class="named-paragraph">Make a list of kinds in declaration order</span><span class="named-paragraph-number">5.3</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_6" class="named-paragraph-link"><span class="named-paragraph">Annotate kinds of object with a sequence counter</span><span class="named-paragraph-number">5.6</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_7" class="named-paragraph-link"><span class="named-paragraph">Write the KindHierarchy array</span><span class="named-paragraph-number">5.7</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_9" class="named-paragraph-link"><span class="named-paragraph">Write an I6 Class definition for each kind of object</span><span class="named-paragraph-number">5.9</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_10" class="named-paragraph-link"><span class="named-paragraph">Write an I6 Object definition for each object instance</span><span class="named-paragraph-number">5.10</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_11" class="named-paragraph-link"><span class="named-paragraph">Write the property metadata array</span><span class="named-paragraph-number">5.11</span></a></span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_12" class="named-paragraph-link"><span class="named-paragraph">Stub the properties</span><span class="named-paragraph-number">5.12</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP5_1" class="paragraph-anchor"></a><b>§5.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Make a list of properties in source order</span><span class="named-paragraph-number">5.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_property_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><span class="identifier-syntax">property_frames</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">DEFN_PROP_IFLD</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">ASSIMILATED_IANN</span><span class="plain-syntax">) != </span><span class="constant-syntax">1</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">total_no_properties</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">ASSIMILATED_IANN</span><span class="plain-syntax">) != </span><span class="constant-syntax">1</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">no_properties</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">no_properties</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">properties_found</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">total_no_properties</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">all_props_in_source_order</span><span class="plain-syntax"> = (</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">Memory::calloc</span><span class="plain-syntax">(</span><span class="identifier-syntax">total_no_properties</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *), </span><span class="constant-syntax">CODE_GENERATION_MREASON</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_property_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><span class="identifier-syntax">property_frames</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">DEFN_PROP_IFLD</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">ASSIMILATED_IANN</span><span class="plain-syntax">) != </span><span class="constant-syntax">1</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">all_props_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">c</span><span class="plain-syntax">++] = </span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span>
|
|
<span class="plain-syntax"> </span><a href="2-iap.html#SP4" class="function-link"><span class="function-syntax">CodeGen::IP::property</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">qsort</span><span class="plain-syntax">(</span><span class="identifier-syntax">all_props_in_source_order</span><span class="plain-syntax">, (</span><span class="identifier-syntax">size_t</span><span class="plain-syntax">) </span><span class="identifier-syntax">total_no_properties</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *),</span>
|
|
<span class="plain-syntax"> </span><a href="2-iap.html#SP7" class="function-link"><span class="function-syntax">CodeGen::IP::compare_kind_symbols</span></a><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">p</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">p</span><span class="plain-syntax"><</span><span class="identifier-syntax">total_no_properties</span><span class="plain-syntax">; </span><span class="identifier-syntax">p</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">all_props_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">p</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><a href="2-iap.html#SP4" class="function-link"><span class="function-syntax">CodeGen::IP::property</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">properties_found</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">props_in_source_order</span><span class="plain-syntax"> = (</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">Memory::calloc</span><span class="plain-syntax">(</span><span class="identifier-syntax">no_properties</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *), </span><span class="constant-syntax">CODE_GENERATION_MREASON</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_property_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><span class="identifier-syntax">property_frames</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">DEFN_PROP_IFLD</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">ASSIMILATED_IANN</span><span class="plain-syntax">) != </span><span class="constant-syntax">1</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">props_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">c</span><span class="plain-syntax">++] = </span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_property_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><span class="identifier-syntax">property_frames</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">DEFN_PROP_IFLD</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">ASSIMILATED_IANN</span><span class="plain-syntax">) == </span><span class="constant-syntax">1</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">ATTRIBUTE_IANN</span><span class="plain-syntax">) != </span><span class="constant-syntax">1</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP10" class="function-link"><span class="function-syntax">CodeGen::Targets::declare_property</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5">§5</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_2" class="paragraph-anchor"></a><b>§5.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Make a list of kinds in source order</span><span class="named-paragraph-number">5.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">kinds_in_source_order</span><span class="plain-syntax"> = (</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">Memory::calloc</span><span class="plain-syntax">(</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *), </span><span class="constant-syntax">CODE_GENERATION_MREASON</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kind_frames</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">DEFN_KIND_IFLD</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">kinds_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">qsort</span><span class="plain-syntax">(</span><span class="identifier-syntax">kinds_in_source_order</span><span class="plain-syntax">, (</span><span class="identifier-syntax">size_t</span><span class="plain-syntax">) </span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *),</span>
|
|
<span class="plain-syntax"> </span><a href="2-iap.html#SP7" class="function-link"><span class="function-syntax">CodeGen::IP::compare_kind_symbols</span></a><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5">§5</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_3" class="paragraph-anchor"></a><b>§5.3. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Make a list of kinds in declaration order</span><span class="named-paragraph-number">5.3</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">kinds_in_declaration_order</span><span class="plain-syntax"> = (</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">Memory::calloc</span><span class="plain-syntax">(</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *), </span><span class="constant-syntax">CODE_GENERATION_MREASON</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kind_frames</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">DEFN_KIND_IFLD</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">kinds_in_declaration_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">qsort</span><span class="plain-syntax">(</span><span class="identifier-syntax">kinds_in_declaration_order</span><span class="plain-syntax">, (</span><span class="identifier-syntax">size_t</span><span class="plain-syntax">) </span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *),</span>
|
|
<span class="plain-syntax"> </span><a href="2-iap.html#SP7" class="function-link"><span class="function-syntax">CodeGen::IP::compare_kind_symbols_decl</span></a><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5">§5</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_4" class="paragraph-anchor"></a><b>§5.4. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Make a list of instances in declaration order</span><span class="named-paragraph-number">5.4</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">instances_in_declaration_order</span><span class="plain-syntax"> = (</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **)</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">Memory::calloc</span><span class="plain-syntax">(</span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *), </span><span class="constant-syntax">CODE_GENERATION_MREASON</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax"> = </span><span class="identifier-syntax">instance_frames</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">DEFN_INST_IFLD</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">instances_in_declaration_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">qsort</span><span class="plain-syntax">(</span><span class="identifier-syntax">instances_in_declaration_order</span><span class="plain-syntax">, (</span><span class="identifier-syntax">size_t</span><span class="plain-syntax">) </span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax">, </span><span class="reserved-syntax">sizeof</span><span class="plain-syntax">(</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *),</span>
|
|
<span class="plain-syntax"> </span><a href="2-iap.html#SP7" class="function-link"><span class="function-syntax">CodeGen::IP::compare_kind_symbols_decl</span></a><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5">§5</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_5" class="paragraph-anchor"></a><b>§5.5. </b>But there's a snag. The above assumes that property values will have the
|
|
same ordering at run-time as their definition order here, but that isn't
|
|
necessarily true. The run-time ordering depends on how early in the I6
|
|
source code they appear, and that in turn depends on which objects have
|
|
which properties, and so on — nothing we can rely on.
|
|
</p>
|
|
|
|
<p class="commentary">We finesse this by creating the following spurious object before the
|
|
class hierarchy and object tree are created: its properties are therefore
|
|
all new creations, and since we declare them in I7 creation order, they
|
|
are now allocated I6 property numbers in a sequence matching this. (We
|
|
don't care about the numbering of non-either/or properties, so we don't
|
|
bother to force them.)
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Compile the property numberspace forcer</span><span class="named-paragraph-number">5.5</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">properties_found</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::declare_instance</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"Object"</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"property_numberspace_forcer"</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">p</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">p</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_properties</span><span class="plain-syntax">; </span><span class="identifier-syntax">p</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">props_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">p</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::get_flag</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">ATTRIBUTE_MARK_BIT</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Property::kind_of</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> == </span><span class="identifier-syntax">truth_state_kind_symbol</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::assign_property</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">), </span><span class="identifier-syntax">I</span><span class="string-syntax">"0"</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::end_instance</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"Object"</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"property_numberspace_forcer"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5">§5</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_6" class="paragraph-anchor"></a><b>§5.6. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Annotate kinds of object with a sequence counter</span><span class="named-paragraph-number">5.6</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kinds_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-iap.html#SP9" class="function-link"><span class="function-syntax">CodeGen::IP::is_kind_of_object</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Inter::Symbols::annotate_i</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">OBJECT_KIND_COUNTER_IANN</span><span class="plain-syntax">, </span><span class="identifier-syntax">c</span><span class="plain-syntax">++);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5">§5</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_7" class="paragraph-anchor"></a><b>§5.7. The kind inheritance tree. </b>We begin with an array providing metadata on the kinds of object: there
|
|
are just two words per kind — the Inform 6 class corresponding to the kind,
|
|
then the instance count for its own kind. For instance, "door" is usually
|
|
kind number 4, so it occupies record 4 in this array — words 8 and 9. Word
|
|
8 will be <span class="extract"><span class="extract-syntax">K4_door</span></span>, the Inform 6 class for doors, and word 9 will be the
|
|
number 2, meaning kind number 2, "thing". This tells us that a door is
|
|
a kind of thing. In this way, we store the hierarchy of <span class="extract"><span class="extract-syntax">N</span></span> kinds in <span class="extract"><span class="extract-syntax">2N</span></span>
|
|
words of memory; it's needed at run-time for checking dynamically that
|
|
property usage is legal.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Write the KindHierarchy array</span><span class="named-paragraph-number">5.7</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">no_kos</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kinds_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-iap.html#SP9" class="function-link"><span class="function-syntax">CodeGen::IP::is_kind_of_object</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">)) </span><span class="identifier-syntax">no_kos</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::begin_array</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"KindHierarchy"</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">no_kos</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::mangled_array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"K0_kind"</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"0"</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kinds_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-iap.html#SP9" class="function-link"><span class="function-syntax">CodeGen::IP::is_kind_of_object</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">super_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Kind::super</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::mangled_array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">), </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">super_name</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">super_name</span><span class="plain-syntax"> != </span><span class="identifier-syntax">object_kind_symbol</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">N</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">N</span><span class="plain-syntax">, </span><span class="string-syntax">"%d"</span><span class="plain-syntax">, </span><a href="2-iap.html#SP10" class="function-link"><span class="function-syntax">CodeGen::IP::kind_of_object_count</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">super_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">N</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">N</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"0"</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"0"</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"0"</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::end_array</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5">§5</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_8" class="paragraph-anchor"></a><b>§5.8. Lookup mechanism for properties of value instances. </b>As noted above, if <span class="extract"><span class="extract-syntax">K</span></span> is a kind which can have properties but is not a subkind
|
|
of object, then a property for instances of <span class="extract"><span class="extract-syntax">K</span></span> is stored in an array called
|
|
a "stick". At run-time, given the property number and <span class="extract"><span class="extract-syntax">K</span></span>, we will need to find
|
|
where in memory the correct stick is, and this needs to be quick.
|
|
</p>
|
|
|
|
<p class="commentary">This is essentially a dictionary lookup problem and we solve it by compiling
|
|
a faux object <span class="extract"><span class="extract-syntax">V</span></span> for each <span class="extract"><span class="extract-syntax">K</span></span>, called a "value property holder" or VPH.
|
|
Given <span class="extract"><span class="extract-syntax">K</span></span> we find <span class="extract"><span class="extract-syntax">V</span></span> by looking it up in the array <span class="extract"><span class="extract-syntax">value_property_holders</span></span>.
|
|
</p>
|
|
|
|
<p class="commentary">Once we know <span class="extract"><span class="extract-syntax">V</span></span>, we then look up <span class="extract"><span class="extract-syntax">V.P</span></span> to get the address of the stick for
|
|
property <span class="extract"><span class="extract-syntax">P</span></span>, something which the virtual machine can do quickly.
|
|
</p>
|
|
|
|
<p class="commentary">This comes at the cost of several hundred bytes of overhead, which we don't
|
|
take lightly in the Z-machine. But speed and flexibility are worth more.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Write Value Property Holder objects for each kind of value instance</span><span class="named-paragraph-number">5.8</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">linked_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">stick_list</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NEW_LINKED_LIST</span><span class="plain-syntax">(</span><span class="reserved-syntax">kov_value_stick</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_8_1" class="named-paragraph-link"><span class="named-paragraph">Define the I6 VPH class</span><span class="named-paragraph-number">5.8.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">max_weak_id</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::url_name_to_symbol</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">I</span><span class="string-syntax">"/main/synoptic/kinds/BASE_KIND_HWM"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">max_weak_id</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">M</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Symbols::evaluate_to_int</span><span class="plain-syntax">(</span><span class="identifier-syntax">max_weak_id</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">M</span><span class="plain-syntax"> != </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_8_2" class="named-paragraph-link"><span class="named-paragraph">Decide who gets a VPH</span><span class="named-paragraph-number">5.8.2</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_8_3" class="named-paragraph-link"><span class="named-paragraph">Write the VPH lookup array</span><span class="named-paragraph-number">5.8.3</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">w</span><span class="plain-syntax">=1; </span><span class="identifier-syntax">w</span><span class="plain-syntax"><</span><span class="identifier-syntax">M</span><span class="plain-syntax">; </span><span class="identifier-syntax">w</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kinds_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-iap.html#SP7" class="function-link"><span class="function-syntax">CodeGen::IP::weak_id</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">) == </span><span class="identifier-syntax">w</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::get_flag</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">VPH_MARK_BIT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">instance_name</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">instance_name</span><span class="plain-syntax">, </span><span class="string-syntax">"VPH_%d"</span><span class="plain-syntax">, </span><span class="identifier-syntax">w</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::declare_instance</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"VPH_Class"</span><span class="plain-syntax">, </span><span class="identifier-syntax">instance_name</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">N</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">N</span><span class="plain-syntax">, </span><span class="string-syntax">"%d"</span><span class="plain-syntax">, </span><span class="identifier-syntax">Inter::Kind::instance_count</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::assign_property</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"value_range"</span><span class="plain-syntax">, </span><span class="identifier-syntax">N</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">N</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">p</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">p</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_properties</span><span class="plain-syntax">; </span><span class="identifier-syntax">p</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">props_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">p</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP10" class="function-link"><span class="function-syntax">CodeGen::unmark</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_node_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">FL</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Inter::Warehouse::get_frame_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">InterTree::warehouse</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">), </span><span class="identifier-syntax">Inter::Kind::permissions_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_8_4" class="named-paragraph-link"><span class="named-paragraph">Work through this frame list of permissions</span><span class="named-paragraph-number">5.8.4</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">in</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">in</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">instances_in_declaration_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">in</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Kind::is_a</span><span class="plain-syntax">(</span><span class="identifier-syntax">Inter::Instance::kind_of</span><span class="plain-syntax">(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">), </span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_node_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">FL</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Inter::Warehouse::get_frame_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">InterTree::warehouse</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">), </span><span class="identifier-syntax">Inter::Instance::permissions_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_8_4" class="named-paragraph-link"><span class="named-paragraph">Work through this frame list of permissions</span><span class="named-paragraph-number">5.8.4</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::end_instance</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"VPH_Class"</span><span class="plain-syntax">, </span><span class="identifier-syntax">instance_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">instance_name</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_8_5" class="named-paragraph-link"><span class="named-paragraph">Compile the property stick arrays</span><span class="named-paragraph-number">5.8.5</span></a></span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5">§5</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_8_1" class="paragraph-anchor"></a><b>§5.8.1. </b>It's convenient to be able to distinguish, at run-time, which objects are
|
|
the VPH objects used only for kind-property indexing; we can test if <span class="extract"><span class="extract-syntax">O</span></span> is
|
|
such an object with the I6 condition <span class="extract"><span class="extract-syntax">(O ofclass VPH_Class)</span></span>.
|
|
</p>
|
|
|
|
<p class="commentary">The property <span class="extract"><span class="extract-syntax">value_range</span></span> for a VPH object is the number <span class="extract"><span class="extract-syntax">N</span></span> such that the
|
|
legal values at run-time for this kind are <span class="extract"><span class="extract-syntax">1, 2, 3, ..., N</span></span>: or in other
|
|
words, the number of instances of this kind.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Define the I6 VPH class</span><span class="named-paragraph-number">5.8.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::declare_class</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"VPH_Class"</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"Class"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::end_class</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"VPH_Class"</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5_8">§5.8</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_8_2" class="paragraph-anchor"></a><b>§5.8.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Decide who gets a VPH</span><span class="named-paragraph-number">5.8.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kinds_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-iap.html#SP9" class="function-link"><span class="function-syntax">CodeGen::IP::is_kind_of_object</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">)) </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> == </span><span class="identifier-syntax">object_kind_symbol</span><span class="plain-syntax">) </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> == </span><span class="identifier-syntax">unchecked_kind_symbol</span><span class="plain-syntax">) </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">vph_me</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_node_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">FL</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Inter::Warehouse::get_frame_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">InterTree::warehouse</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">), </span><span class="identifier-syntax">Inter::Kind::permissions_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">FL</span><span class="plain-syntax">-></span><span class="identifier-syntax">first_in_inl</span><span class="plain-syntax">) </span><span class="identifier-syntax">vph_me</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">in</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">in</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">instances_in_declaration_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">in</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Kind::is_a</span><span class="plain-syntax">(</span><span class="identifier-syntax">Inter::Instance::kind_of</span><span class="plain-syntax">(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">), </span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_node_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">FL</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Inter::Warehouse::get_frame_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">InterTree::warehouse</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">), </span><span class="identifier-syntax">Inter::Instance::permissions_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">FL</span><span class="plain-syntax">-></span><span class="identifier-syntax">first_in_inl</span><span class="plain-syntax">) </span><span class="identifier-syntax">vph_me</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">vph_me</span><span class="plain-syntax">) </span><span class="identifier-syntax">Inter::Symbols::set_flag</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">VPH_MARK_BIT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5_8">§5.8</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP_1" class="paragraph-anchor"></a><b>§.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Look through this frame list of permissions</span><span class="named-paragraph-number">.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<ul class="endnotetexts"><li>This code is never used.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_8_3" class="paragraph-anchor"></a><b>§5.8.3. </b>This array is indexed by the weak kind ID of <span class="extract"><span class="extract-syntax">K</span></span>. The entry is 0 if <span class="extract"><span class="extract-syntax">K</span></span>
|
|
doesn't have a VPH, or the object number of its VPH if it has.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Write the VPH lookup array</span><span class="named-paragraph-number">5.8.3</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::begin_array</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"value_property_holders"</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"0"</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">vph</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">w</span><span class="plain-syntax">=1; </span><span class="identifier-syntax">w</span><span class="plain-syntax"><</span><span class="identifier-syntax">M</span><span class="plain-syntax">; </span><span class="identifier-syntax">w</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">written</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kinds_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-iap.html#SP7" class="function-link"><span class="function-syntax">CodeGen::IP::weak_id</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">) == </span><span class="identifier-syntax">w</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::get_flag</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">VPH_MARK_BIT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">written</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">vph</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">vph</span><span class="plain-syntax">, </span><span class="string-syntax">"VPH_%d"</span><span class="plain-syntax">, </span><span class="identifier-syntax">w</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::mangled_array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">vph</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">vph</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">written</span><span class="plain-syntax">) </span><span class="identifier-syntax">vph</span><span class="plain-syntax">++; </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"0"</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::end_array</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_8_3_1" class="named-paragraph-link"><span class="named-paragraph">Stub a faux VPH if none have otherwise been created</span><span class="named-paragraph-number">5.8.3.1</span></a></span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5_8">§5.8</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_8_3_1" class="paragraph-anchor"></a><b>§5.8.3.1. </b>In the event that no value instances have properties, there'll be no
|
|
instances of the <span class="extract"><span class="extract-syntax">VPH_Class</span></span>, and no I6 object will be compiled with a
|
|
<span class="extract"><span class="extract-syntax">value_range</span></span> property; that means I6 code referring to this will fail with an
|
|
I6 error. We don't want that, so if necessary we compile a useless VPH object
|
|
just to force the property into being.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Stub a faux VPH if none have otherwise been created</span><span class="named-paragraph-number">5.8.3.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">vph</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"VPH_Class UnusedVPH with value_range 0;\n"</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5_8_3">§5.8.3</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_8_4" class="paragraph-anchor"></a><b>§5.8.4. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Work through this frame list of permissions</span><span class="named-paragraph-number">5.8.4</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">X</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_INTER_NODE_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">FL</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">PROP_PERM_IFLD</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"no property"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-cg.html#SP10" class="function-link"><span class="function-syntax">CodeGen::marked</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP10" class="function-link"><span class="function-syntax">CodeGen::mark</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">call_it</span><span class="plain-syntax"> = </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">STORAGE_PERM_IFLD</span><span class="plain-syntax">]) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">store</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">STORAGE_PERM_IFLD</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">store</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"bad PP in inter"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::assign_mangled_property</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">call_it</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">store</span><span class="plain-syntax">), </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">ident</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">kov_value_stick</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kvs</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CREATE</span><span class="plain-syntax">(</span><span class="reserved-syntax">kov_value_stick</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">kvs</span><span class="plain-syntax">-></span><span class="element-syntax">identifier</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::new</span><span class="plain-syntax">();</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">kvs</span><span class="plain-syntax">-></span><span class="element-syntax">identifier</span><span class="plain-syntax">, </span><span class="string-syntax">"KOVP_%d_P%d"</span><span class="plain-syntax">, </span><span class="identifier-syntax">w</span><span class="plain-syntax">, </span><a href="2-iap.html#SP7" class="function-link"><span class="function-syntax">CodeGen::IP::pnum</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">kvs</span><span class="plain-syntax">-></span><span class="element-syntax">prop</span><span class="plain-syntax"> = </span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">kvs</span><span class="plain-syntax">-></span><span class="element-syntax">kind_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">kvs</span><span class="plain-syntax">-></span><span class="element-syntax">node</span><span class="plain-syntax"> = </span><span class="identifier-syntax">X</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">ADD_TO_LINKED_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">kvs</span><span class="plain-syntax">, </span><span class="reserved-syntax">kov_value_stick</span><span class="plain-syntax">, </span><span class="identifier-syntax">stick_list</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::assign_mangled_property</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">call_it</span><span class="plain-syntax">, </span><span class="identifier-syntax">kvs</span><span class="plain-syntax">-></span><span class="element-syntax">identifier</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">ident</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5_8">§5.8</a> (twice).</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_8_5" class="paragraph-anchor"></a><b>§5.8.5. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Compile the property stick arrays</span><span class="named-paragraph-number">5.8.5</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">kov_value_stick</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kvs</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_OVER_LINKED_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">kvs</span><span class="plain-syntax">, </span><span class="reserved-syntax">kov_value_stick</span><span class="plain-syntax">, </span><span class="identifier-syntax">stick_list</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kvs</span><span class="plain-syntax">-></span><span class="element-syntax">prop</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kvs</span><span class="plain-syntax">-></span><span class="element-syntax">kind_name</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ident</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kvs</span><span class="plain-syntax">-></span><span class="element-syntax">identifier</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">X</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kvs</span><span class="plain-syntax">-></span><span class="element-syntax">node</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_8_5_1" class="named-paragraph-link"><span class="named-paragraph">Compile a stick of property values and put its address here</span><span class="named-paragraph-number">5.8.5.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5_8">§5.8</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_8_5_1" class="paragraph-anchor"></a><b>§5.8.5.1. </b>These little arrays are sticks of property values, and they are laid out
|
|
as if they were column arrays in a Table data structure. This means they must
|
|
be <span class="extract"><span class="extract-syntax">table</span></span> arrays (which wastes one word of memory) and must have blanked-out
|
|
table column header words at the front (which wastes a further <span class="extract"><span class="extract-syntax">COL_HSIZE</span></span>
|
|
words). But the cost is a simple overhead, not rising with the number of
|
|
instances, and it's a small price for the gain in simplicity and speed.
|
|
</p>
|
|
|
|
<p class="commentary">The entries here are bracketed to avoid the Inform 6 syntax ambiguity between
|
|
<span class="extract"><span class="extract-syntax">4 -5</span></span> (two entries, four followed by minus five) and <span class="extract"><span class="extract-syntax">4-5</span></span> (one entry, just
|
|
minus one). Inform 6 always uses the second interpretation, so just in case
|
|
there are negative literal integers in these array entries, we use
|
|
brackets: thus <span class="extract"><span class="extract-syntax">(4) (-5)</span></span>. This cannot be confused with function calling
|
|
because I6 doesn't allow function calls in a constant context.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Compile a stick of property values and put its address here</span><span class="named-paragraph-number">5.8.5.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::begin_array</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">ident</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="constant-syntax">TABLE_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"0"</span><span class="plain-syntax">, </span><span class="constant-syntax">TABLE_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"0"</span><span class="plain-syntax">, </span><span class="constant-syntax">TABLE_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">j</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">j</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">j</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">instances_in_declaration_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">j</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Kind::is_a</span><span class="plain-syntax">(</span><span class="identifier-syntax">Inter::Instance::kind_of</span><span class="plain-syntax">(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">), </span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">found</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_node_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">PVL</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Inode::ID_to_frame_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Inter::Instance::properties_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_8_5_1_1" class="named-paragraph-link"><span class="named-paragraph">Work through this frame list of values</span><span class="named-paragraph-number">5.8.5.1.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">PVL</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inode::ID_to_frame_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Inter::Kind::properties_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_8_5_1_1" class="named-paragraph-link"><span class="named-paragraph">Work through this frame list of values</span><span class="named-paragraph-number">5.8.5.1.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">found</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"0"</span><span class="plain-syntax">, </span><span class="constant-syntax">TABLE_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::end_array</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="constant-syntax">TABLE_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5_8_5">§5.8.5</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_8_5_1_1" class="paragraph-anchor"></a><b>§5.8.5.1.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Work through this frame list of values</span><span class="named-paragraph-number">5.8.5.1.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">Y</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_INTER_NODE_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">Y</span><span class="plain-syntax">, </span><span class="identifier-syntax">PVL</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">p_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_id</span><span class="plain-syntax">(</span><span class="identifier-syntax">Inter::Packages::scope_of</span><span class="plain-syntax">(</span><span class="identifier-syntax">Y</span><span class="plain-syntax">), </span><span class="identifier-syntax">Y</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">PROP_PVAL_IFLD</span><span class="plain-syntax">]);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">p_name</span><span class="plain-syntax"> == </span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">found</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">found</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">v1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Y</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">DVAL1_PVAL_IFLD</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">v2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Y</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">DVAL2_PVAL_IFLD</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">val</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP6" class="function-link"><span class="function-syntax">CodeGen::select_temporary</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">val</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::literal</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">Inter::Packages::scope_of</span><span class="plain-syntax">(</span><span class="identifier-syntax">Y</span><span class="plain-syntax">), </span><span class="identifier-syntax">v1</span><span class="plain-syntax">, </span><span class="identifier-syntax">v2</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP6" class="function-link"><span class="function-syntax">CodeGen::deselect_temporary</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">val</span><span class="plain-syntax">, </span><span class="constant-syntax">TABLE_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">val</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5_8_5_1">§5.8.5.1</a> (twice).</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_9" class="paragraph-anchor"></a><b>§5.9. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Write an I6 Class definition for each kind of object</span><span class="named-paragraph-number">5.9</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kinds_in_declaration_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> == </span><span class="identifier-syntax">object_kind_symbol</span><span class="plain-syntax">) ||</span>
|
|
<span class="plain-syntax"> (</span><a href="2-iap.html#SP9" class="function-link"><span class="function-syntax">CodeGen::IP::is_kind_of_object</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">))) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">super_class</span><span class="plain-syntax"> = </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">super_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Kind::super</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">super_name</span><span class="plain-syntax">) </span><span class="identifier-syntax">super_class</span><span class="plain-syntax"> = </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">super_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::declare_class</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">), </span><span class="identifier-syntax">super_class</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-iap.html#SP8" class="function-link"><span class="function-syntax">CodeGen::IP::append</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_node_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">FL</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Inter::Warehouse::get_frame_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">InterTree::warehouse</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">), </span><span class="identifier-syntax">Inter::Kind::properties_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="2-iap.html#SP8" class="function-link"><span class="function-syntax">CodeGen::IP::plist</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">FL</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::end_class</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5">§5</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_10" class="paragraph-anchor"></a><b>§5.10. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Write an I6 Object definition for each object instance</span><span class="named-paragraph-number">5.10</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">instances_in_declaration_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">D</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Symbols::definition</span><span class="plain-syntax">(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-iap.html#SP8" class="function-link"><span class="function-syntax">CodeGen::IP::object_instance</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">D</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5">§5</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_11" class="paragraph-anchor"></a><b>§5.11. </b>The following lets the run-time environment know what properties are
|
|
called, and which kinds of object are allowed to have them. This might look
|
|
a little odd: why does the run-time code need to know any of that?
|
|
</p>
|
|
|
|
<p class="commentary">The answer is that the Inform compiler will prevent grossly type-unsafe
|
|
property accesses at compile time — for example, asking if a number is
|
|
"recurring" (an either/or property of scenes), which can be ruled out
|
|
because numbers and scenes are wholly disjoint as values. But it will allow
|
|
any object property of any object to be accessed, because it's not usually
|
|
possible for the typechecker to know if an object value <span class="extract"><span class="extract-syntax">O</span></span> is a vehicle, a
|
|
direction, and so on. So the finer access controls for properties of
|
|
objects are left until run-time (whereas no such regime is needed for
|
|
properties of values). To make this possible, we need to tell the run-time
|
|
code what is and is not allowed.
|
|
</p>
|
|
|
|
<p class="commentary">The <span class="extract"><span class="extract-syntax">property_metadata</span></span> array is organised as a sequence of variable-sized
|
|
records. Because of that, we also need arrays telling us where to find
|
|
the start of the record for a given I6 property (or attribute): we have two
|
|
of these, called <span class="extract"><span class="extract-syntax">attributed_property_offsets</span></span> and <span class="extract"><span class="extract-syntax">valued_property_offsets</span></span>.
|
|
The dummy value <span class="extract"><span class="extract-syntax">-1</span></span> means that the relevant property has no metadata record,
|
|
though this won't happen for any property created by I7 source text.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Write the property metadata array</span><span class="named-paragraph-number">5.11</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">properties_found</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::begin_array</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"property_metadata"</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">pos</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">p</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">p</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_properties</span><span class="plain-syntax">; </span><span class="identifier-syntax">p</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">props_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">p</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::get_flag</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">ATTRIBUTE_MARK_BIT</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::property_offset</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">), </span><span class="identifier-syntax">pos</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">else</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::property_offset</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">), </span><span class="identifier-syntax">pos</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_11_1" class="named-paragraph-link"><span class="named-paragraph">Write the property name in double quotes</span><span class="named-paragraph-number">5.11.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_11_2" class="named-paragraph-link"><span class="named-paragraph">Write a list of kinds or objects which are permitted to have this property</span><span class="named-paragraph-number">5.11.2</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::mangled_array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"NULL"</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">pos</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::end_array</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5">§5</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_11_1" class="paragraph-anchor"></a><b>§5.11.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Write the property name in double quotes</span><span class="named-paragraph-number">5.11.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pname</span><span class="plain-syntax"> = </span><span class="identifier-syntax">I</span><span class="string-syntax">"<nameless>"</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">PROPERTY_NAME_IANN</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> > </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">pname</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Warehouse::get_text</span><span class="plain-syntax">(</span><span class="identifier-syntax">InterTree::warehouse</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">), (</span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax">) </span><span class="identifier-syntax">N</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP6" class="function-link"><span class="function-syntax">CodeGen::select_temporary</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">entry</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP9" class="function-link"><span class="function-syntax">CodeGen::Targets::compile_literal_text</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">pname</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP6" class="function-link"><span class="function-syntax">CodeGen::deselect_temporary</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">entry</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">entry</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">pos</span><span class="plain-syntax">++;</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5_11">§5.11</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_11_2" class="paragraph-anchor"></a><b>§5.11.2. </b>A complete list here would be wasteful both of space and run-time
|
|
checking time, but we only need a list \(O_1, O_2, ..., O_k\) such that for
|
|
each \(W\) allowed to have the property, either \(W = O_i\) for some \(i\), or
|
|
\(W\) is of kind \(O_i\) for some \(i\) (perhaps indirectly).
|
|
</p>
|
|
|
|
<p class="commentary">In a tricksy complication, we need to allow for the possibility that two
|
|
or more different I7 properties are actually equal at run-time. This wouldn't
|
|
happen by itself, but does happen if two different properties are translated
|
|
to the same I6 property, and in fact the template does this: "lighted" and
|
|
"lit" both translate to I6 <span class="extract"><span class="extract-syntax">light</span></span>. The only way to reconcile this is to
|
|
make the list a union of the lists of both. This does mean the routine
|
|
runs in \(O(P^2N)\) time, where \(P\) is the number of properties and \(N\) the
|
|
number of objects, but we can live with that. \(P\) does not in practice rise
|
|
linearly with the size of the source text, even though \(N\) does.
|
|
</p>
|
|
|
|
<p class="commentary"><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Write a list of kinds or objects which are permitted to have this property</span><span class="named-paragraph-number">5.11.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">e</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">e</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_properties</span><span class="plain-syntax">; </span><span class="identifier-syntax">e</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">eprop_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">props_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">e</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::eq</span><span class="plain-syntax">(</span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">eprop_name</span><span class="plain-syntax">), </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">))) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_node_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">EVL</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Inter::Warehouse::get_frame_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">InterTree::warehouse</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Inter::Property::permissions_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">eprop_name</span><span class="plain-syntax">));</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_11_2_1" class="named-paragraph-link"><span class="named-paragraph">List any O with an explicit permission</span><span class="named-paragraph-number">5.11.2.1</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-iap.html#SP5_11_2_2" class="named-paragraph-link"><span class="named-paragraph">List all top-level kinds if "object" itself has an explicit permission</span><span class="named-paragraph-number">5.11.2.2</span></a></span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5_11">§5.11</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_11_2_1" class="paragraph-anchor"></a><b>§5.11.2.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">List any O with an explicit permission</span><span class="named-paragraph-number">5.11.2.1</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">k</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">k</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">k</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kinds_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">k</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-iap.html#SP9" class="function-link"><span class="function-syntax">CodeGen::IP::is_kind_of_object</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">X</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_INTER_NODE_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">EVL</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">owner_name</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">OWNER_PERM_IFLD</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">owner_name</span><span class="plain-syntax"> == </span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::mangled_array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">), </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">pos</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">in</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">in</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_instance_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">in</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">instances_in_declaration_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">in</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-iap.html#SP9" class="function-link"><span class="function-syntax">CodeGen::IP::is_kind_of_object</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">Inter::Instance::kind_of</span><span class="plain-syntax">(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">))) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">X</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_INTER_NODE_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">EVL</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">owner_name</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">OWNER_PERM_IFLD</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">owner_name</span><span class="plain-syntax"> == </span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::mangled_array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">), </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">pos</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5_11_2">§5.11.2</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_11_2_2" class="paragraph-anchor"></a><b>§5.11.2.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">List all top-level kinds if "object" itself has an explicit permission</span><span class="named-paragraph-number">5.11.2.2</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">eprop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">RTO_IANN</span><span class="plain-syntax">) < </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">X</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_INTER_NODE_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">EVL</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">owner_name</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">OWNER_PERM_IFLD</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">owner_name</span><span class="plain-syntax"> == </span><span class="identifier-syntax">object_kind_symbol</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::mangled_array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"K0_kind"</span><span class="plain-syntax">, </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">pos</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">k</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">k</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_kind_frames</span><span class="plain-syntax">; </span><span class="identifier-syntax">k</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">kinds_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">k</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Kind::super</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">) == </span><span class="identifier-syntax">object_kind_symbol</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP18" class="function-link"><span class="function-syntax">CodeGen::Targets::mangled_array_entry</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">), </span><span class="constant-syntax">WORD_ARRAY_FORMAT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">pos</span><span class="plain-syntax">++;</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5_11_2">§5.11.2</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP5_12" class="paragraph-anchor"></a><b>§5.12. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Stub the properties</span><span class="named-paragraph-number">5.12</span></span><span class="comment-syntax"> =</span>
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">p</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">p</span><span class="plain-syntax"><</span><span class="identifier-syntax">no_properties</span><span class="plain-syntax">; </span><span class="identifier-syntax">p</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">props_in_source_order</span><span class="plain-syntax">[</span><span class="identifier-syntax">p</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">ASSIMILATED_IANN</span><span class="plain-syntax">) != </span><span class="constant-syntax">1</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP10" class="function-link"><span class="function-syntax">CodeGen::Targets::declare_property</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
</pre>
|
|
<ul class="endnotetexts"><li>This code is used in <a href="2-iap.html#SP5">§5</a>.</li></ul>
|
|
<p class="commentary firstcommentary"><a id="SP6" class="paragraph-anchor"></a><b>§6. Instances. </b></p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::instance</span><button class="popup" onclick="togglePopup('usagePopup5')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup5">Usage of <span class="code-font"><span class="function-syntax">CodeGen::IP::instance</span></span>:<br/>Frame Control - <a href="2-fc.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">DEFN_INST_IFLD</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inst_kind</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">KIND_INST_IFLD</span><span class="plain-syntax">);</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Kind::is_a</span><span class="plain-syntax">(</span><span class="identifier-syntax">inst_kind</span><span class="plain-syntax">, </span><span class="identifier-syntax">object_kind_symbol</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">val1</span><span class="plain-syntax"> = </span><span class="identifier-syntax">P</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">VAL1_INST_IFLD</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">val2</span><span class="plain-syntax"> = </span><span class="identifier-syntax">P</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">VAL2_INST_IFLD</span><span class="plain-syntax">];</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">defined</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">val1</span><span class="plain-syntax"> == </span><span class="identifier-syntax">UNDEF_IVAL</span><span class="plain-syntax">) </span><span class="identifier-syntax">defined</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">generated_segment</span><span class="plain-syntax"> *</span><span class="identifier-syntax">saved</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP5" class="function-link"><span class="function-syntax">CodeGen::select</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-ft.html#SP4" class="function-link"><span class="function-syntax">CodeGen::Targets::basic_constant_segment</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP7" class="function-link"><span class="function-syntax">CodeGen::current</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-ft.html#SP14" class="function-link"><span class="function-syntax">CodeGen::Targets::begin_constant</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">), </span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">defined</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">)) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">defined</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">hex</span><span class="plain-syntax"> = </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Annotations::find</span><span class="plain-syntax">(&(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">-></span><span class="identifier-syntax">ann_set</span><span class="plain-syntax">), </span><span class="identifier-syntax">HEX_IANN</span><span class="plain-syntax">)) </span><span class="identifier-syntax">hex</span><span class="plain-syntax"> = </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">hex</span><span class="plain-syntax">) </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"$%x"</span><span class="plain-syntax">, </span><span class="identifier-syntax">val2</span><span class="plain-syntax">); </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%d"</span><span class="plain-syntax">, </span><span class="identifier-syntax">val2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP14" class="function-link"><span class="function-syntax">CodeGen::Targets::end_constant</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">), </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> }</span>
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|
<span class="plain-syntax"> </span><a href="2-cg.html#SP5" class="function-link"><span class="function-syntax">CodeGen::deselect</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">saved</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
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|
<p class="commentary firstcommentary"><a id="SP7" class="paragraph-anchor"></a><b>§7. </b></p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::pnum</span><button class="popup" onclick="togglePopup('usagePopup6')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup6">Usage of <span class="code-font"><span class="function-syntax">CodeGen::IP::pnum</span></span>:<br/><a href="2-iap.html#SP5_8_4">§5.8.4</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">SOURCE_ORDER_IANN</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
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|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::compare_kind_symbols</span><button class="popup" onclick="togglePopup('usagePopup7')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup7">Usage of <span class="code-font"><span class="function-syntax">CodeGen::IP::compare_kind_symbols</span></span>:<br/><a href="2-iap.html#SP5_1">§5.1</a>, <a href="2-iap.html#SP5_2">§5.2</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="reserved-syntax">void</span><span class="plain-syntax"> *</span><span class="identifier-syntax">elem1</span><span class="plain-syntax">, </span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="reserved-syntax">void</span><span class="plain-syntax"> *</span><span class="identifier-syntax">elem2</span><span class="plain-syntax">) {</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **</span><span class="identifier-syntax">e1</span><span class="plain-syntax"> = (</span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **) </span><span class="identifier-syntax">elem1</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **</span><span class="identifier-syntax">e2</span><span class="plain-syntax"> = (</span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **) </span><span class="identifier-syntax">elem2</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((*</span><span class="identifier-syntax">e1</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (*</span><span class="identifier-syntax">e2</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"Disaster while sorting kinds"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">s1</span><span class="plain-syntax"> = </span><a href="2-iap.html#SP7" class="function-link"><span class="function-syntax">CodeGen::IP::kind_sequence_number</span></a><span class="plain-syntax">(*</span><span class="identifier-syntax">e1</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">s2</span><span class="plain-syntax"> = </span><a href="2-iap.html#SP7" class="function-link"><span class="function-syntax">CodeGen::IP::kind_sequence_number</span></a><span class="plain-syntax">(*</span><span class="identifier-syntax">e2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">s1</span><span class="plain-syntax"> != </span><span class="identifier-syntax">s2</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">s1</span><span class="plain-syntax">-</span><span class="identifier-syntax">s2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">Inter::Symbols::sort_number</span><span class="plain-syntax">(*</span><span class="identifier-syntax">e1</span><span class="plain-syntax">) - </span><span class="identifier-syntax">Inter::Symbols::sort_number</span><span class="plain-syntax">(*</span><span class="identifier-syntax">e2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::compare_kind_symbols_decl</span><button class="popup" onclick="togglePopup('usagePopup8')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup8">Usage of <span class="code-font"><span class="function-syntax">CodeGen::IP::compare_kind_symbols_decl</span></span>:<br/><a href="2-iap.html#SP5_3">§5.3</a>, <a href="2-iap.html#SP5_4">§5.4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="reserved-syntax">void</span><span class="plain-syntax"> *</span><span class="identifier-syntax">elem1</span><span class="plain-syntax">, </span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="reserved-syntax">void</span><span class="plain-syntax"> *</span><span class="identifier-syntax">elem2</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **</span><span class="identifier-syntax">e1</span><span class="plain-syntax"> = (</span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **) </span><span class="identifier-syntax">elem1</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **</span><span class="identifier-syntax">e2</span><span class="plain-syntax"> = (</span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> **) </span><span class="identifier-syntax">elem2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((*</span><span class="identifier-syntax">e1</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (*</span><span class="identifier-syntax">e2</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">))</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"Disaster while sorting kinds"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">s1</span><span class="plain-syntax"> = </span><a href="2-iap.html#SP7" class="function-link"><span class="function-syntax">CodeGen::IP::kind_sequence_number_decl</span></a><span class="plain-syntax">(*</span><span class="identifier-syntax">e1</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">s2</span><span class="plain-syntax"> = </span><a href="2-iap.html#SP7" class="function-link"><span class="function-syntax">CodeGen::IP::kind_sequence_number_decl</span></a><span class="plain-syntax">(*</span><span class="identifier-syntax">e2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">s1</span><span class="plain-syntax"> != </span><span class="identifier-syntax">s2</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">s1</span><span class="plain-syntax">-</span><span class="identifier-syntax">s2</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">Inter::Symbols::sort_number</span><span class="plain-syntax">(*</span><span class="identifier-syntax">e1</span><span class="plain-syntax">) - </span><span class="identifier-syntax">Inter::Symbols::sort_number</span><span class="plain-syntax">(*</span><span class="identifier-syntax">e2</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::kind_sequence_number</span><span class="plain-syntax">(</span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">SOURCE_ORDER_IANN</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">100000000</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::kind_sequence_number_decl</span><span class="plain-syntax">(</span><span class="reserved-syntax">const</span><span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">DECLARATION_ORDER_IANN</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">100000000</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::weak_id</span><button class="popup" onclick="togglePopup('usagePopup9')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup9">Usage of <span class="code-font"><span class="function-syntax">CodeGen::IP::weak_id</span></span>:<br/><a href="2-iap.html#SP5_8">§5.8</a>, <a href="2-iap.html#SP5_8_3">§5.8.3</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pack</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Packages::container</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">-></span><span class="identifier-syntax">definition</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">weak_s</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Metadata::read_optional_symbol</span><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"^weak_id"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">alt_N</span><span class="plain-syntax"> = -1;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">weak_s</span><span class="plain-syntax">) </span><span class="identifier-syntax">alt_N</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Symbols::evaluate_to_int</span><span class="plain-syntax">(</span><span class="identifier-syntax">weak_s</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">alt_N</span><span class="plain-syntax"> >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">alt_N</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP8" class="paragraph-anchor"></a><b>§8. </b>For the I6 header syntax, see the DM4. Note that the "hardwired" short
|
|
name is intentionally made blank: we always use I6's <span class="extract"><span class="extract-syntax">short_name</span></span> property
|
|
instead. I7's spatial plugin, if loaded (as it usually is), will have
|
|
annotated the Inter symbol for the object with an arrow count, that is,
|
|
a measure of its spatial depth. This we translate into I6 arrow notation.
|
|
If the spatial plugin wasn't loaded then we have no notion of containment,
|
|
all arrow counts are 0, and we define a flat sequence of free-standing objects.
|
|
</p>
|
|
|
|
<p class="commentary">One last oddball thing is that direction objects have to be compiled in I6
|
|
as if they were spatially inside a special object called <span class="extract"><span class="extract-syntax">Compass</span></span>. This doesn't
|
|
really make much conceptual sense, and I7 dropped the idea — it has no
|
|
"compass".
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::object_instance</span><button class="popup" onclick="togglePopup('usagePopup10')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup10">Usage of <span class="code-font"><span class="function-syntax">CodeGen::IP::object_instance</span></span>:<br/><a href="2-iap.html#SP5_10">§5.10</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">DEFN_INST_IFLD</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">inst_kind</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">, </span><span class="identifier-syntax">KIND_INST_IFLD</span><span class="plain-syntax">);</span>
|
|
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Kind::is_a</span><span class="plain-syntax">(</span><span class="identifier-syntax">inst_kind</span><span class="plain-syntax">, </span><span class="identifier-syntax">object_kind_symbol</span><span class="plain-syntax">)) {</span>
|
|
<span class="comment-syntax"> text_stream *OUT = CodeGen::current(gen);</span>
|
|
<span class="comment-syntax"> WRITE("Object ");</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">ARROW_COUNT_IANN</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">is_dir</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Kind::is_a</span><span class="plain-syntax">(</span><span class="identifier-syntax">inst_kind</span><span class="plain-syntax">, </span><span class="identifier-syntax">direction_kind_symbol</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::declare_instance</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inst_kind</span><span class="plain-syntax">), </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">), </span><span class="identifier-syntax">c</span><span class="plain-syntax">, </span><span class="identifier-syntax">is_dir</span><span class="plain-syntax">);</span>
|
|
|
|
<span class="comment-syntax"> for (int i=0; i<c; i++) WRITE("-> ");</span>
|
|
<span class="comment-syntax"> WRITE("%S \"\"", CodeGen::CL::name(inst_name));</span>
|
|
<span class="comment-syntax"> if (Inter::Kind::is_a(inst_kind, direction_kind_symbol)) { WRITE(" Compass"); }</span>
|
|
<span class="comment-syntax"> WRITE("\n class %S\n", CodeGen::CL::name(inst_kind));</span>
|
|
<span class="plain-syntax"> </span><a href="2-iap.html#SP8" class="function-link"><span class="function-syntax">CodeGen::IP::append</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_node_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">FL</span><span class="plain-syntax"> =</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Inode::ID_to_frame_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">P</span><span class="plain-syntax">,</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">Inter::Instance::properties_list</span><span class="plain-syntax">(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><a href="2-iap.html#SP8" class="function-link"><span class="function-syntax">CodeGen::IP::plist</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">FL</span><span class="plain-syntax">);</span>
|
|
<span class="comment-syntax"> WRITE(";\n\n");</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::end_instance</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inst_kind</span><span class="plain-syntax">), </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">inst_name</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::plist</span><button class="popup" onclick="togglePopup('usagePopup11')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup11">Usage of <span class="code-font"><span class="function-syntax">CodeGen::IP::plist</span></span>:<br/><a href="2-iap.html#SP5_9">§5.9</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_node_list</span><span class="plain-syntax"> *</span><span class="identifier-syntax">FL</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">FL</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"no properties list"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">X</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">LOOP_THROUGH_INTER_NODE_LIST</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">FL</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::symbol_from_frame_data</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">, </span><span class="identifier-syntax">PROP_PVAL_IFLD</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"no property"</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">call_it</span><span class="plain-syntax"> = </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Symbols::get_flag</span><span class="plain-syntax">(</span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">ATTRIBUTE_MARK_BIT</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">X</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">DVAL1_PVAL_IFLD</span><span class="plain-syntax">] == </span><span class="identifier-syntax">LITERAL_IVAL</span><span class="plain-syntax">) &&</span>
|
|
<span class="plain-syntax"> (</span><span class="identifier-syntax">X</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">DVAL2_PVAL_IFLD</span><span class="plain-syntax">] == </span><span class="constant-syntax">0</span><span class="plain-syntax">)) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::assign_property</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">call_it</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"0"</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::assign_property</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">call_it</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="string-syntax">"1"</span><span class="plain-syntax">, </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP6" class="function-link"><span class="function-syntax">CodeGen::select_temporary</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">OUT</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::optimise_property_value</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">prop_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">X</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::literal</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">Inter::Packages::scope_of</span><span class="plain-syntax">(</span><span class="identifier-syntax">X</span><span class="plain-syntax">),</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">X</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">DVAL1_PVAL_IFLD</span><span class="plain-syntax">], </span><span class="identifier-syntax">X</span><span class="plain-syntax">-></span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="identifier-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">DVAL2_PVAL_IFLD</span><span class="plain-syntax">], </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><a href="2-cg.html#SP6" class="function-link"><span class="function-syntax">CodeGen::deselect_temporary</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><a href="2-ft.html#SP12" class="function-link"><span class="function-syntax">CodeGen::Targets::assign_property</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">call_it</span><span class="plain-syntax">, </span><span class="identifier-syntax">OUT</span><span class="plain-syntax">, </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">OUT</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
|
|
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::append</span><button class="popup" onclick="togglePopup('usagePopup12')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup12">Usage of <span class="code-font"><span class="function-syntax">CodeGen::IP::append</span></span>:<br/><a href="2-iap.html#SP5_9">§5.9</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">symb</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP7" class="function-link"><span class="function-syntax">CodeGen::current</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_tree</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax"> = </span><span class="identifier-syntax">gen</span><span class="plain-syntax">-></span><span class="element-syntax">from</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Symbols::read_annotation_t</span><span class="plain-syntax">(</span><span class="identifier-syntax">symb</span><span class="plain-syntax">, </span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="identifier-syntax">APPEND_IANN</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Str::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">) == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" "</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">L</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">=0; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">L</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">wchar_t</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::get_at</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> == </span><span class="constant-syntax">URL_SYMBOL_CHAR</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax">++; </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="identifier-syntax">L</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">wchar_t</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Str::get_at</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="identifier-syntax">i</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> == </span><span class="constant-syntax">URL_SYMBOL_CHAR</span><span class="plain-syntax">) </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">PUT_TO</span><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">, </span><span class="identifier-syntax">c</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">symb</span><span class="plain-syntax"> = </span><span class="identifier-syntax">InterSymbolsTables::url_name_to_symbol</span><span class="plain-syntax">(</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">T</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"%S"</span><span class="plain-syntax">, </span><a href="2-cal.html#SP2" class="function-link"><span class="function-syntax">CodeGen::CL::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">symb</span><span class="plain-syntax">));</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">DISCARD_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">T</span><span class="plain-syntax">)</span>
|
|
<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> </span><span class="identifier-syntax">PUT</span><span class="plain-syntax">(</span><span class="identifier-syntax">c</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">c</span><span class="plain-syntax"> == </span><span class="character-syntax">'\n'</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">i</span><span class="plain-syntax"> != </span><span class="identifier-syntax">Str::len</span><span class="plain-syntax">(</span><span class="identifier-syntax">S</span><span class="plain-syntax">)-1)) </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" "</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> }</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP9" class="paragraph-anchor"></a><b>§9. </b></p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
|
|
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::is_kind_of_object</span><button class="popup" onclick="togglePopup('usagePopup13')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup13">Usage of <span class="code-font"><span class="function-syntax">CodeGen::IP::is_kind_of_object</span></span>:<br/><a href="2-iap.html#SP4_1">§4.1</a>, <a href="2-iap.html#SP5_6">§5.6</a>, <a href="2-iap.html#SP5_7">§5.7</a>, <a href="2-iap.html#SP5_8_2">§5.8.2</a>, <a href="2-iap.html#SP5_9">§5.9</a>, <a href="2-iap.html#SP5_11_2_1">§5.11.2.1</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">) {</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> == </span><span class="identifier-syntax">object_kind_symbol</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="identifier-syntax">inter_data_type</span><span class="plain-syntax"> *</span><span class="identifier-syntax">idt</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Kind::data_type</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">idt</span><span class="plain-syntax"> == </span><span class="identifier-syntax">unchecked_idt</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">Inter::Kind::is_a</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">object_kind_symbol</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">TRUE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">}</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP10" class="paragraph-anchor"></a><b>§10. </b>Counting kinds of object, not very quickly:
|
|
</p>
|
|
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<pre class="displayed-code all-displayed-code code-font">
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<span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="function-syntax">CodeGen::IP::kind_of_object_count</span><button class="popup" onclick="togglePopup('usagePopup14')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup14">Usage of <span class="code-font"><span class="function-syntax">CodeGen::IP::kind_of_object_count</span></span>:<br/><a href="2-iap.html#SP5_7">§5.7</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) || (</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax"> == </span><span class="identifier-syntax">object_kind_symbol</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">N</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Inter::Symbols::read_annotation</span><span class="plain-syntax">(</span><span class="identifier-syntax">kind_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">OBJECT_KIND_COUNTER_IANN</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">N</span><span class="plain-syntax"> >= </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> (</span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax">) </span><span class="identifier-syntax">N</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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