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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../compiler.html">Inter Modules</a></li><li><a href="index.html">bytecode</a></li><li><a href="index.html#2">Chapter 2: Interoperability</a></li><li><b>Transmigration</b></li></ul></div>
<p class="purpose">To move packages between repositories.</p>
<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>&#167;1. </b></p>
<pre class="displayed-code all-displayed-code code-font">
<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">ipct_cache_count</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
<span class="reserved-syntax">void</span><span class="plain-syntax"> </span><span class="function-syntax">Inter::Transmigration::cache</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">Inter::Transmigration::cache</span></span>:<br/><a href="2-trn.html#SP3">&#167;3</a>, <a href="2-trn.html#SP3_1">&#167;3.1</a>, <a href="2-trn.html#SP3_2">&#167;3.2</a>, <a href="2-trn.html#SP3_3">&#167;3.3</a>, <a href="2-trn.html#SP4_1">&#167;4.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">S</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">V</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">S</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">linked_to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">V</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">S</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">link_time</span><span class="plain-syntax"> = </span><span class="identifier-syntax">ipct_cache_count</span><span class="plain-syntax">;</span>
<span class="plain-syntax">}</span>
<span class="reserved-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="function-syntax">Inter::Transmigration::cached_equivalent</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">Inter::Transmigration::cached_equivalent</span></span>:<br/><a href="2-trn.html#SP3">&#167;3</a>, <a href="2-trn.html#SP3_1">&#167;3.1</a>, <a href="2-trn.html#SP3_2">&#167;3.2</a>, <a href="2-trn.html#SP3_3">&#167;3.3</a>, <a href="2-trn.html#SP4_1">&#167;4.1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_symbol</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">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">S</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">link_time</span><span class="plain-syntax"> == </span><span class="identifier-syntax">ipct_cache_count</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">S</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">linked_to</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">NULL</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">Inter::Transmigration::move</span><span class="plain-syntax">(</span><span class="reserved-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">migrant</span><span class="plain-syntax">, </span><span class="reserved-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">destination</span><span class="plain-syntax">, </span><span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="identifier-syntax">tidy_origin</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::make_names_exist</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">migrant</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_tree</span><span class="plain-syntax"> *</span><span class="identifier-syntax">origin_tree</span><span class="plain-syntax"> = </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::tree</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">migrant</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_tree</span><span class="plain-syntax"> *</span><span class="identifier-syntax">destination_tree</span><span class="plain-syntax"> = </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::tree</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">destination</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">origin</span><span class="plain-syntax"> = </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::parent</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">migrant</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_bookmark</span><span class="plain-syntax"> </span><span class="identifier-syntax">deletion_point</span><span class="plain-syntax">, </span><span class="identifier-syntax">insertion_point</span><span class="plain-syntax">, </span><span class="identifier-syntax">primitives_point</span><span class="plain-syntax">, </span><span class="identifier-syntax">ptypes_point</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-trn.html#SP1_1" class="named-paragraph-link"><span class="named-paragraph">Create these bookmarks</span><span class="named-paragraph-number">1.1</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-trn.html#SP1_2" class="named-paragraph-link"><span class="named-paragraph">Mark the insertion and deletion points with comments</span><span class="named-paragraph-number">1.2</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-trn.html#SP1_3" class="named-paragraph-link"><span class="named-paragraph">Physically move the subtree to its new home</span><span class="named-paragraph-number">1.3</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-trn.html#SP1_4" class="named-paragraph-link"><span class="named-paragraph">Correct any references from the migrant to the origin</span><span class="named-paragraph-number">1.4</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">tidy_origin</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-trn.html#SP1_5" class="named-paragraph-link"><span class="named-paragraph">Correct any references from the origin to the migrant</span><span class="named-paragraph-number">1.5</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">connectors</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Site::connectors_package</span><span class="plain-syntax">(</span><span class="identifier-syntax">origin_tree</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">connectors</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_symbols_table</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">connectors</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">T</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">"package with no symbols"</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="function-syntax">&lt;T-&gt;</span><span class="element-syntax">size</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">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">symb</span><span class="plain-syntax"> = </span><span class="identifier-syntax">T</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_array</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">symb</span><span class="plain-syntax">) &amp;&amp; (</span><a href="2-sym.html#SP2" class="function-link"><span class="function-syntax">Inter::Symbols::get_scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">symb</span><span class="plain-syntax">) == </span><span class="constant-syntax">SOCKET_ISYMS</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">target</span><span class="plain-syntax"> = </span><span class="identifier-syntax">symb</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</span><span class="plain-syntax">) </span><span class="identifier-syntax">target</span><span class="plain-syntax"> = </span><span class="identifier-syntax">target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">target_package</span><span class="plain-syntax"> = </span><span class="identifier-syntax">target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">owning_table</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">owning_package</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">target_package</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">target_package</span><span class="plain-syntax"> != </span><span class="identifier-syntax">migrant</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">target_package</span><span class="plain-syntax"> = </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::parent</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">target_package</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">target_package</span><span class="plain-syntax"> == </span><span class="identifier-syntax">migrant</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">INTER_CONNECTORS</span><span class="plain-syntax">, </span><span class="string-syntax">"Origin offers socket inside migrant: $3 == $3\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">symb</span><span class="plain-syntax">, </span><span class="identifier-syntax">target</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">equivalent</span><span class="plain-syntax"> = </span><a href="2-cnn.html#SP1" class="function-link"><span class="function-syntax">Inter::Connectors::find_socket</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">destination_tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">symb</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_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">equivalent</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">e_target</span><span class="plain-syntax"> = </span><span class="identifier-syntax">equivalent</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">e_target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</span><span class="plain-syntax">) </span><span class="identifier-syntax">e_target</span><span class="plain-syntax"> = </span><span class="identifier-syntax">e_target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</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-sym.html#SP4" class="function-link"><span class="function-syntax">Inter::Symbols::is_defined</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">e_target</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">INTER_CONNECTORS</span><span class="plain-syntax">, </span><span class="string-syntax">"Able to match with $3 == $3\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">equivalent</span><span class="plain-syntax">, </span><span class="identifier-syntax">equivalent</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">equivalent</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">target</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">e_target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">target</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">LOGIF</span><span class="plain-syntax">(</span><span class="identifier-syntax">INTER_CONNECTORS</span><span class="plain-syntax">, </span><span class="string-syntax">"Clash of sockets\n"</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-cnn.html#SP1" class="function-link"><span class="function-syntax">Inter::Connectors::socket</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">destination_tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">symb</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">symb</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>
</pre>
<p class="commentary firstcommentary"><a id="SP_1" class="paragraph-anchor"></a><b>&#167;.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Log sockets in origin tree</span><span class="named-paragraph-number">.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">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"\n\n\nList of sockets in origin tree:\n"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">connectors</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Site::connectors_package</span><span class="plain-syntax">(</span><span class="identifier-syntax">origin_tree</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">connectors</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_symbols_table</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">connectors</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">T</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">"package with no symbols"</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="function-syntax">&lt;T-&gt;</span><span class="element-syntax">size</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">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">symb</span><span class="plain-syntax"> = </span><span class="identifier-syntax">T</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_array</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">symb</span><span class="plain-syntax">) &amp;&amp; (</span><a href="2-sym.html#SP2" class="function-link"><span class="function-syntax">Inter::Symbols::get_scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">symb</span><span class="plain-syntax">) == </span><span class="constant-syntax">SOCKET_ISYMS</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">"$3\n"</span><span class="plain-syntax">, </span><span class="identifier-syntax">symb</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="identifier-syntax">LOG</span><span class="plain-syntax">(</span><span class="string-syntax">"---\n\n"</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is never used.</li></ul>
<p class="commentary firstcommentary"><a id="SP1_1" class="paragraph-anchor"></a><b>&#167;1.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Create these bookmarks</span><span class="named-paragraph-number">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">deletion_point</span><span class="plain-syntax"> =</span>
<span class="plain-syntax"> </span><a href="2-bkm.html#SP1" class="function-link"><span class="function-syntax">Inter::Bookmarks::after_this_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">migrant</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package_head</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">migrant</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package_head</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">insertion_point</span><span class="plain-syntax"> =</span>
<span class="plain-syntax"> </span><a href="2-bkm.html#SP1" class="function-link"><span class="function-syntax">Inter::Bookmarks::at_end_of_this_package</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">destination</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">prims</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">LOOP_THROUGH_INTER_CHILDREN</span><span class="plain-syntax">(</span><span class="identifier-syntax">F</span><span class="plain-syntax">, </span><span class="identifier-syntax">destination</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package_head</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">tree</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">root_node</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">F</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">W</span><span class="plain-syntax">.</span><span class="element-syntax">data</span><span class="plain-syntax">[</span><span class="constant-syntax">ID_IFLD</span><span class="plain-syntax">] == </span><span class="constant-syntax">PRIMITIVE_IST</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">prims</span><span class="plain-syntax"> = </span><span class="identifier-syntax">F</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">prims</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">"dest has no prims"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">primitives_point</span><span class="plain-syntax"> = </span><a href="2-bkm.html#SP1" class="function-link"><span class="function-syntax">Inter::Bookmarks::after_this_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">destination</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package_head</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">prims</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ptypes</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">LOOP_THROUGH_INTER_CHILDREN</span><span class="plain-syntax">(</span><span class="identifier-syntax">F</span><span class="plain-syntax">, </span><span class="identifier-syntax">destination</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package_head</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">tree</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">root_node</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">F</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">W</span><span class="plain-syntax">.</span><span class="element-syntax">data</span><span class="plain-syntax">[</span><span class="constant-syntax">ID_IFLD</span><span class="plain-syntax">] == </span><span class="constant-syntax">PACKAGETYPE_IST</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">ptypes</span><span class="plain-syntax"> = </span><span class="identifier-syntax">F</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">ptypes</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">"dest has no prims"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">ptypes_point</span><span class="plain-syntax"> = </span><a href="2-bkm.html#SP1" class="function-link"><span class="function-syntax">Inter::Bookmarks::after_this_node</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">destination</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package_head</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">ptypes</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-trn.html#SP1">&#167;1</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP1_2" class="paragraph-anchor"></a><b>&#167;1.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Mark the insertion and deletion points with comments</span><span class="named-paragraph-number">1.2</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="constant-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">C1</span><span class="plain-syntax"> = </span><a href="2-tw.html#SP3" class="function-link"><span class="function-syntax">Inter::Warehouse::create_text</span></a><span class="plain-syntax">(</span><a href="2-bkm.html#SP1" class="function-link"><span class="function-syntax">Inter::Bookmarks::warehouse</span></a><span class="plain-syntax">(&amp;</span><span class="identifier-syntax">deletion_point</span><span class="plain-syntax">), </span><a href="2-bkm.html#SP1" class="function-link"><span class="function-syntax">Inter::Bookmarks::package</span></a><span class="plain-syntax">(&amp;</span><span class="identifier-syntax">deletion_point</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-tw.html#SP3" class="function-link"><span class="function-syntax">Inter::Warehouse::get_text</span></a><span class="plain-syntax">(</span><a href="2-bkm.html#SP1" class="function-link"><span class="function-syntax">Inter::Bookmarks::warehouse</span></a><span class="plain-syntax">(&amp;</span><span class="identifier-syntax">deletion_point</span><span class="plain-syntax">), </span><span class="identifier-syntax">C1</span><span class="plain-syntax">),</span>
<span class="plain-syntax"> </span><span class="string-syntax">"Exported %S here"</span><span class="plain-syntax">, </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">migrant</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><a href="4-tcc.html#SP1" class="function-link"><span class="function-syntax">Inter::Comment::new</span></a><span class="plain-syntax">(&amp;</span><span class="identifier-syntax">deletion_point</span><span class="plain-syntax">, (</span><span class="constant-syntax">inter_ti</span><span class="plain-syntax">) </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::baseline</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">migrant</span><span class="plain-syntax">), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">C1</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="constant-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">C2</span><span class="plain-syntax"> = </span><a href="2-tw.html#SP3" class="function-link"><span class="function-syntax">Inter::Warehouse::create_text</span></a><span class="plain-syntax">(</span><a href="2-bkm.html#SP1" class="function-link"><span class="function-syntax">Inter::Bookmarks::warehouse</span></a><span class="plain-syntax">(&amp;</span><span class="identifier-syntax">insertion_point</span><span class="plain-syntax">), </span><a href="2-bkm.html#SP1" class="function-link"><span class="function-syntax">Inter::Bookmarks::package</span></a><span class="plain-syntax">(&amp;</span><span class="identifier-syntax">insertion_point</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-tw.html#SP3" class="function-link"><span class="function-syntax">Inter::Warehouse::get_text</span></a><span class="plain-syntax">(</span><a href="2-bkm.html#SP1" class="function-link"><span class="function-syntax">Inter::Bookmarks::warehouse</span></a><span class="plain-syntax">(&amp;</span><span class="identifier-syntax">insertion_point</span><span class="plain-syntax">), </span><span class="identifier-syntax">C2</span><span class="plain-syntax">),</span>
<span class="plain-syntax"> </span><span class="string-syntax">"Imported %S here"</span><span class="plain-syntax">, </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">migrant</span><span class="plain-syntax">));</span>
<span class="plain-syntax"> </span><a href="4-tcc.html#SP1" class="function-link"><span class="function-syntax">Inter::Comment::new</span></a><span class="plain-syntax">(&amp;</span><span class="identifier-syntax">insertion_point</span><span class="plain-syntax">, (</span><span class="constant-syntax">inter_ti</span><span class="plain-syntax">) </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::baseline</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">destination</span><span class="plain-syntax">) + </span><span class="constant-syntax">1</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">C2</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-trn.html#SP1">&#167;1</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP1_3" class="paragraph-anchor"></a><b>&#167;1.3. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Physically move the subtree to its new home</span><span class="named-paragraph-number">1.3</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-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::remove_subpackage_name</span></a><span class="plain-syntax">(</span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::parent</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">migrant</span><span class="plain-syntax">), </span><span class="identifier-syntax">migrant</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::add_subpackage_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">destination</span><span class="plain-syntax">, </span><span class="identifier-syntax">migrant</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-bkm.html#SP1" class="function-link"><span class="function-syntax">Inter::Bookmarks::insert</span></a><span class="plain-syntax">(&amp;</span><span class="identifier-syntax">insertion_point</span><span class="plain-syntax">, </span><span class="identifier-syntax">migrant</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package_head</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-trn.html#SP1">&#167;1</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>&#167;2. </b></p>
<pre class="displayed-code all-displayed-code code-font">
<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">ipct_state</span><span class="plain-syntax"> {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">migrant</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">destination</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_bookmark</span><span class="plain-syntax"> *</span><span class="identifier-syntax">primitives_point</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_bookmark</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ptypes_point</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_tree</span><span class="plain-syntax"> *</span><span class="identifier-syntax">origin_tree</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_tree</span><span class="plain-syntax"> *</span><span class="identifier-syntax">destination_tree</span><span class="plain-syntax">;</span>
<span class="plain-syntax">} </span><span class="reserved-syntax">ipct_state</span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>The structure ipct_state is private to this section.</li></ul>
<p class="commentary firstcommentary"><a id="SP_1" class="paragraph-anchor"></a><b>&#167;.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Initialise the IPCT state</span><span class="named-paragraph-number">.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">ipct_cache_count</span><span class="plain-syntax">++;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">ipct</span><span class="plain-syntax">.</span><span class="element-syntax">migrant</span><span class="plain-syntax"> = </span><span class="identifier-syntax">migrant</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">ipct</span><span class="plain-syntax">.</span><span class="element-syntax">destination</span><span class="plain-syntax"> = </span><span class="identifier-syntax">destination</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">ipct</span><span class="plain-syntax">.</span><span class="element-syntax">origin_tree</span><span class="plain-syntax"> = </span><span class="identifier-syntax">origin_tree</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">ipct</span><span class="plain-syntax">.</span><span class="element-syntax">destination_tree</span><span class="plain-syntax"> = </span><span class="identifier-syntax">destination_tree</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">ipct</span><span class="plain-syntax">.</span><span class="element-syntax">primitives_point</span><span class="plain-syntax"> = &amp;</span><span class="identifier-syntax">primitives_point</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">ipct</span><span class="plain-syntax">.</span><span class="element-syntax">ptypes_point</span><span class="plain-syntax"> = &amp;</span><span class="identifier-syntax">ptypes_point</span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-trn.html#SP1_4">&#167;1.4</a>, <a href="2-trn.html#SP1_5">&#167;1.5</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP1_4" class="paragraph-anchor"></a><b>&#167;1.4. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Correct any references from the migrant to the origin</span><span class="named-paragraph-number">1.4</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">ipct_state</span><span class="plain-syntax"> </span><span class="identifier-syntax">ipct</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-trn.html#SP_1" class="named-paragraph-link"><span class="named-paragraph">Initialise the IPCT state</span><span class="named-paragraph-number">.1</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><a href="2-it.html#SP5" class="function-link"><span class="function-syntax">InterTree::traverse</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">destination</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package_head</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">tree</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><a href="2-trn.html#SP3" class="function-link"><span class="function-syntax">Inter::Transmigration::correct_migrant</span></a><span class="plain-syntax">, &amp;</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">, </span><span class="identifier-syntax">migrant</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-trn.html#SP1">&#167;1</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>&#167;3. </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">Inter::Transmigration::correct_migrant</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">Inter::Transmigration::correct_migrant</span></span>:<br/><a href="2-trn.html#SP1_4">&#167;1.4</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_tree</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="reserved-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>
<span class="plain-syntax"> </span><span class="reserved-syntax">ipct_state</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ipct</span><span class="plain-syntax"> = (</span><span class="reserved-syntax">ipct_state</span><span class="plain-syntax"> *) </span><span class="identifier-syntax">state</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">P</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">tree</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">P</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">W</span><span class="plain-syntax">.</span><span class="element-syntax">data</span><span class="plain-syntax">[</span><span class="constant-syntax">ID_IFLD</span><span class="plain-syntax">] == </span><span class="constant-syntax">INV_IST</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">P</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">W</span><span class="plain-syntax">.</span><span class="element-syntax">data</span><span class="plain-syntax">[</span><span class="constant-syntax">METHOD_INV_IFLD</span><span class="plain-syntax">] == </span><span class="constant-syntax">INVOKED_PRIMITIVE</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">primitive</span><span class="plain-syntax"> =</span>
<span class="plain-syntax"> </span><a href="2-st.html#SP6" class="function-link"><span class="function-syntax">InterSymbolsTables::symbol_from_id</span></a><span class="plain-syntax">(</span><a href="2-it.html#SP2" class="function-link"><span class="function-syntax">InterTree::global_scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">origin_tree</span><span class="plain-syntax">), </span><span class="identifier-syntax">P</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">W</span><span class="plain-syntax">.</span><span class="element-syntax">data</span><span class="plain-syntax">[</span><span class="constant-syntax">INVOKEE_INV_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">primitive</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-trn.html#SP3_1" class="named-paragraph-link"><span class="named-paragraph">Correct the reference to this primitive</span><span class="named-paragraph-number">3.1</span></a></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">P</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="element-syntax">data</span><span class="plain-syntax">[</span><span class="constant-syntax">ID_IFLD</span><span class="plain-syntax">] == </span><span class="constant-syntax">PACKAGE_IST</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pack</span><span class="plain-syntax"> = </span><a href="4-tpc3.html#SP2" class="function-link"><span class="function-syntax">Inter::Package::defined_by_frame</span></a><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">pack</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 package defined here"</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-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::is_linklike</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-trn.html#SP3_2" class="named-paragraph-link"><span class="named-paragraph">Correct the reference to this package type</span><span class="named-paragraph-number">3.2</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_symbols_table</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">pack</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">T</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">"package with no symbols"</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="function-syntax">&lt;T-&gt;</span><span class="element-syntax">size</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">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">symb</span><span class="plain-syntax"> = </span><span class="identifier-syntax">T</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_array</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">symb</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">symb</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">equated_to</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">target</span><span class="plain-syntax"> = </span><span class="identifier-syntax">symb</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</span><span class="plain-syntax">) </span><span class="identifier-syntax">target</span><span class="plain-syntax"> = </span><span class="identifier-syntax">target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</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-sym.html#SP4" class="function-link"><span class="function-syntax">Inter::Symbols::read_annotation</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">target</span><span class="plain-syntax">, </span><span class="constant-syntax">VENEER_IANN</span><span class="plain-syntax">) &gt; </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">symb</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">Veneer::find</span><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">destination</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package_head</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_name</span><span class="plain-syntax">, </span><span class="identifier-syntax">Produce::kind_to_symbol</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">else</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="2-sym.html#SP2" class="function-link"><span class="function-syntax">Inter::Symbols::get_scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">target</span><span class="plain-syntax">) == </span><span class="constant-syntax">PLUG_ISYMS</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">equivalent</span><span class="plain-syntax"> = </span><a href="2-trn.html#SP1" class="function-link"><span class="function-syntax">Inter::Transmigration::cached_equivalent</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">target</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">equivalent</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">equivalent</span><span class="plain-syntax"> = </span><a href="2-cnn.html#SP1" class="function-link"><span class="function-syntax">Inter::Connectors::find_plug</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">destination</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package_head</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_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">equivalent</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">equivalent</span><span class="plain-syntax"> = </span><a href="2-cnn.html#SP1" class="function-link"><span class="function-syntax">Inter::Connectors::plug</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">destination</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package_head</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_name</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><a href="2-trn.html#SP1" class="function-link"><span class="function-syntax">Inter::Transmigration::cache</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">target</span><span class="plain-syntax">, </span><span class="identifier-syntax">equivalent</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">symb</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">equivalent</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">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">target_package</span><span class="plain-syntax"> = </span><span class="identifier-syntax">target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">owning_table</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">owning_package</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">target_package</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">target_package</span><span class="plain-syntax"> != </span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">migrant</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">target_package</span><span class="plain-syntax"> = </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::parent</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">target_package</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">target_package</span><span class="plain-syntax"> != </span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">migrant</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-trn.html#SP3_3" class="named-paragraph-link"><span class="named-paragraph">Correct the reference to this symbol</span><span class="named-paragraph-number">3.3</span></a></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>
<p class="commentary firstcommentary"><a id="SP3_1" class="paragraph-anchor"></a><b>&#167;3.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Correct the reference to this primitive</span><span class="named-paragraph-number">3.1</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">equivalent_primitive</span><span class="plain-syntax"> = </span><a href="2-trn.html#SP1" class="function-link"><span class="function-syntax">Inter::Transmigration::cached_equivalent</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">primitive</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">equivalent_primitive</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">equivalent_primitive</span><span class="plain-syntax"> = </span><a href="2-st.html#SP4" class="function-link"><span class="function-syntax">InterSymbolsTables::symbol_from_name</span></a><span class="plain-syntax">(</span><a href="2-it.html#SP2" class="function-link"><span class="function-syntax">InterTree::global_scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">destination_tree</span><span class="plain-syntax">), </span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_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">equivalent_primitive</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-trn.html#SP3_1_1" class="named-paragraph-link"><span class="named-paragraph">Duplicate this primitive</span><span class="named-paragraph-number">3.1.1</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">equivalent_primitive</span><span class="plain-syntax">) </span><a href="2-trn.html#SP1" class="function-link"><span class="function-syntax">Inter::Transmigration::cache</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">primitive</span><span class="plain-syntax">, </span><span class="identifier-syntax">equivalent_primitive</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">equivalent_primitive</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">P</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="element-syntax">data</span><span class="plain-syntax">[</span><span class="constant-syntax">INVOKEE_INV_IFLD</span><span class="plain-syntax">] = </span><a href="2-st.html#SP9" class="function-link"><span class="function-syntax">InterSymbolsTables::id_from_symbol_inner</span></a><span class="plain-syntax">(</span><a href="2-it.html#SP2" class="function-link"><span class="function-syntax">InterTree::global_scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">destination_tree</span><span class="plain-syntax">), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">equivalent_primitive</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-trn.html#SP3">&#167;3</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP3_1_1" class="paragraph-anchor"></a><b>&#167;3.1.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Duplicate this primitive</span><span class="named-paragraph-number">3.1.1</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">equivalent_primitive</span><span class="plain-syntax"> = </span><a href="2-st.html#SP4" class="function-link"><span class="function-syntax">InterSymbolsTables::symbol_from_name_creating</span></a><span class="plain-syntax">(</span><a href="2-it.html#SP2" class="function-link"><span class="function-syntax">InterTree::global_scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">destination_tree</span><span class="plain-syntax">), </span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_name</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">D</span><span class="plain-syntax"> = </span><a href="2-in.html#SP4" class="function-link"><span class="function-syntax">Inode::fill_1</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">primitives_point</span><span class="plain-syntax">, </span><span class="constant-syntax">PRIMITIVE_IST</span><span class="plain-syntax">, </span><a href="2-st.html#SP9" class="function-link"><span class="function-syntax">InterSymbolsTables::id_from_symbol_inner</span></a><span class="plain-syntax">(</span><a href="2-it.html#SP2" class="function-link"><span class="function-syntax">InterTree::global_scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">destination_tree</span><span class="plain-syntax">), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">equivalent_primitive</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>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">old_D</span><span class="plain-syntax"> = </span><span class="identifier-syntax">primitive</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">definition</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">=</span><span class="constant-syntax">CAT_PRIM_IFLD</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="function-syntax">&lt;old_D-&gt;</span><span class="element-syntax">W</span><span class="plain-syntax">.</span><span class="element-syntax">extent</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-in.html#SP5" class="function-link"><span class="function-syntax">Inode::extend</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">D</span><span class="plain-syntax">, (</span><span class="constant-syntax">inter_ti</span><span class="plain-syntax">) </span><span class="constant-syntax">1</span><span class="plain-syntax">) == </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">) </span><span class="identifier-syntax">internal_error</span><span class="plain-syntax">(</span><span class="string-syntax">"can't extend"</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">D</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="element-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">] = </span><span class="identifier-syntax">old_D</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">W</span><span class="plain-syntax">.</span><span class="element-syntax">data</span><span class="plain-syntax">[</span><span class="identifier-syntax">i</span><span class="plain-syntax">];</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_error_message</span><span class="plain-syntax"> *</span><span class="identifier-syntax">E</span><span class="plain-syntax"> = </span><a href="3-dfn.html#SP4" class="function-link"><span class="function-syntax">Inter::Defn::verify_construct</span></a><span class="plain-syntax">(</span><a href="2-bkm.html#SP1" class="function-link"><span class="function-syntax">Inter::Bookmarks::package</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">primitives_point</span><span class="plain-syntax">), </span><span class="identifier-syntax">D</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">E</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><a href="3-ie.html#SP1" class="function-link"><span class="function-syntax">Inter::Errors::issue</span></a><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">equivalent_primitive</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">else</span><span class="plain-syntax"> {</span>
<span class="plain-syntax"> </span><a href="2-bkm.html#SP1" class="function-link"><span class="function-syntax">Inter::Bookmarks::insert</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">primitives_point</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-trn.html#SP3_1">&#167;3.1</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP3_2" class="paragraph-anchor"></a><b>&#167;3.2. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Correct the reference to this package type</span><span class="named-paragraph-number">3.2</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">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">original_ptype</span><span class="plain-syntax"> =</span>
<span class="plain-syntax"> </span><a href="2-st.html#SP6" class="function-link"><span class="function-syntax">InterSymbolsTables::symbol_from_id</span></a><span class="plain-syntax">(</span>
<span class="plain-syntax"> </span><a href="2-it.html#SP2" class="function-link"><span class="function-syntax">InterTree::global_scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">origin_tree</span><span class="plain-syntax">), </span><span class="identifier-syntax">P</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">W</span><span class="plain-syntax">.</span><span class="element-syntax">data</span><span class="plain-syntax">[</span><span class="constant-syntax">PTYPE_PACKAGE_IFLD</span><span class="plain-syntax">]);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">equivalent_ptype</span><span class="plain-syntax"> = </span><a href="2-trn.html#SP1" class="function-link"><span class="function-syntax">Inter::Transmigration::cached_equivalent</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">original_ptype</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">equivalent_ptype</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">equivalent_ptype</span><span class="plain-syntax"> = </span><a href="2-st.html#SP4" class="function-link"><span class="function-syntax">InterSymbolsTables::symbol_from_name</span></a><span class="plain-syntax">(</span><a href="2-it.html#SP2" class="function-link"><span class="function-syntax">InterTree::global_scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">destination_tree</span><span class="plain-syntax">), </span><span class="identifier-syntax">original_ptype</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_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">equivalent_ptype</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) </span><span class="named-paragraph-container code-font"><a href="2-trn.html#SP3_2_1" class="named-paragraph-link"><span class="named-paragraph">Duplicate this package type</span><span class="named-paragraph-number">3.2.1</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">equivalent_ptype</span><span class="plain-syntax">) </span><a href="2-trn.html#SP1" class="function-link"><span class="function-syntax">Inter::Transmigration::cache</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">original_ptype</span><span class="plain-syntax">, </span><span class="identifier-syntax">equivalent_ptype</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">equivalent_ptype</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">P</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="element-syntax">data</span><span class="plain-syntax">[</span><span class="constant-syntax">PTYPE_PACKAGE_IFLD</span><span class="plain-syntax">] = </span><a href="2-st.html#SP9" class="function-link"><span class="function-syntax">InterSymbolsTables::id_from_symbol_inner</span></a><span class="plain-syntax">(</span><a href="2-it.html#SP2" class="function-link"><span class="function-syntax">InterTree::global_scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">destination_tree</span><span class="plain-syntax">), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">equivalent_ptype</span><span class="plain-syntax">);</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-trn.html#SP3">&#167;3</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP3_2_1" class="paragraph-anchor"></a><b>&#167;3.2.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Duplicate this package type</span><span class="named-paragraph-number">3.2.1</span></span><span class="comment-syntax"> =</span>
</p>
<pre class="displayed-code all-displayed-code code-font">
<span class="plain-syntax"> </span><span class="identifier-syntax">equivalent_ptype</span><span class="plain-syntax"> = </span><a href="2-st.html#SP4" class="function-link"><span class="function-syntax">InterSymbolsTables::symbol_from_name_creating</span></a><span class="plain-syntax">(</span><a href="2-it.html#SP2" class="function-link"><span class="function-syntax">InterTree::global_scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">destination_tree</span><span class="plain-syntax">), </span><span class="identifier-syntax">original_ptype</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_name</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">D</span><span class="plain-syntax"> = </span><a href="2-in.html#SP4" class="function-link"><span class="function-syntax">Inode::fill_1</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">ptypes_point</span><span class="plain-syntax">, </span><span class="constant-syntax">PACKAGETYPE_IST</span><span class="plain-syntax">, </span><a href="2-st.html#SP9" class="function-link"><span class="function-syntax">InterSymbolsTables::id_from_symbol_inner</span></a><span class="plain-syntax">(</span><a href="2-it.html#SP2" class="function-link"><span class="function-syntax">InterTree::global_scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">destination_tree</span><span class="plain-syntax">), </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">equivalent_ptype</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>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_error_message</span><span class="plain-syntax"> *</span><span class="identifier-syntax">E</span><span class="plain-syntax"> = </span><a href="3-dfn.html#SP4" class="function-link"><span class="function-syntax">Inter::Defn::verify_construct</span></a><span class="plain-syntax">(</span><a href="2-bkm.html#SP1" class="function-link"><span class="function-syntax">Inter::Bookmarks::package</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">ptypes_point</span><span class="plain-syntax">), </span><span class="identifier-syntax">D</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">E</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><a href="3-ie.html#SP1" class="function-link"><span class="function-syntax">Inter::Errors::issue</span></a><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">equivalent_ptype</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">else</span><span class="plain-syntax"> {</span>
<span class="plain-syntax"> </span><a href="2-bkm.html#SP1" class="function-link"><span class="function-syntax">Inter::Bookmarks::insert</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">ptypes_point</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-trn.html#SP3_2">&#167;3.2</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP3_3" class="paragraph-anchor"></a><b>&#167;3.3. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Correct the reference to this symbol</span><span class="named-paragraph-number">3.3</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">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">equivalent</span><span class="plain-syntax"> = </span><a href="2-trn.html#SP1" class="function-link"><span class="function-syntax">Inter::Transmigration::cached_equivalent</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">target</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">equivalent</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">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">URL</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><a href="2-st.html#SP11" class="function-link"><span class="function-syntax">InterSymbolsTables::symbol_to_url_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">URL</span><span class="plain-syntax">, </span><span class="identifier-syntax">target</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">equivalent</span><span class="plain-syntax"> = </span><a href="2-st.html#SP11" class="function-link"><span class="function-syntax">InterSymbolsTables::url_name_to_symbol</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">destination</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package_head</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="identifier-syntax">URL</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">equivalent</span><span class="plain-syntax"> == </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">) &amp;&amp; (</span><a href="4-tkc.html#SP2" class="function-link"><span class="function-syntax">Inter::Kind::is</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">target</span><span class="plain-syntax">)))</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">equivalent</span><span class="plain-syntax"> = </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::search_resources_exhaustively</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">destination</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package_head</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_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">equivalent</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">equivalent</span><span class="plain-syntax"> = </span><a href="2-cnn.html#SP1" class="function-link"><span class="function-syntax">Inter::Connectors::plug</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">destination_tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">URL</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">URL</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><a href="2-trn.html#SP1" class="function-link"><span class="function-syntax">Inter::Transmigration::cache</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">target</span><span class="plain-syntax">, </span><span class="identifier-syntax">equivalent</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">symb</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">equated_to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">equivalent</span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-trn.html#SP3">&#167;3</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP1_5" class="paragraph-anchor"></a><b>&#167;1.5. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Correct any references from the origin to the migrant</span><span class="named-paragraph-number">1.5</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">ipct_state</span><span class="plain-syntax"> </span><span class="identifier-syntax">ipct</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-trn.html#SP_1" class="named-paragraph-link"><span class="named-paragraph">Initialise the IPCT state</span><span class="named-paragraph-number">.1</span></a></span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><a href="2-it.html#SP5" class="function-link"><span class="function-syntax">InterTree::traverse</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">origin</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">package_head</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">tree</span><span class="plain-syntax">,</span>
<span class="plain-syntax"> </span><a href="2-trn.html#SP4" class="function-link"><span class="function-syntax">Inter::Transmigration::correct_origin</span></a><span class="plain-syntax">, &amp;</span><span class="identifier-syntax">ipct</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>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-trn.html#SP1">&#167;1</a>.</li></ul>
<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>&#167;4. </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">Inter::Transmigration::correct_origin</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">Inter::Transmigration::correct_origin</span></span>:<br/><a href="2-trn.html#SP1_5">&#167;1.5</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">inter_tree</span><span class="plain-syntax"> *</span><span class="identifier-syntax">I</span><span class="plain-syntax">, </span><span class="reserved-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>
<span class="plain-syntax"> </span><span class="reserved-syntax">ipct_state</span><span class="plain-syntax"> *</span><span class="identifier-syntax">ipct</span><span class="plain-syntax"> = (</span><span class="reserved-syntax">ipct_state</span><span class="plain-syntax"> *) </span><span class="identifier-syntax">state</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</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">W</span><span class="plain-syntax">.</span><span class="element-syntax">data</span><span class="plain-syntax">[</span><span class="constant-syntax">ID_IFLD</span><span class="plain-syntax">] == </span><span class="constant-syntax">PACKAGE_IST</span><span class="plain-syntax">) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">pack</span><span class="plain-syntax"> = </span><a href="4-tpc3.html#SP2" class="function-link"><span class="function-syntax">Inter::Package::defined_by_frame</span></a><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">pack</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 package defined here"</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-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::is_linklike</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">pack</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_symbols_table</span><span class="plain-syntax"> *</span><span class="identifier-syntax">T</span><span class="plain-syntax"> = </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::scope</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">pack</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">T</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">"package with no symbols"</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="function-syntax">&lt;T-&gt;</span><span class="element-syntax">size</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">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">symb</span><span class="plain-syntax"> = </span><span class="identifier-syntax">T</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">symbol_array</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">symb</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">symb</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">equated_to</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">target</span><span class="plain-syntax"> = </span><span class="identifier-syntax">symb</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</span><span class="plain-syntax">) </span><span class="identifier-syntax">target</span><span class="plain-syntax"> = </span><span class="identifier-syntax">target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">equated_to</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">inter_package</span><span class="plain-syntax"> *</span><span class="identifier-syntax">target_package</span><span class="plain-syntax"> = </span><span class="identifier-syntax">target</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">owning_table</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">owning_package</span><span class="plain-syntax">;</span>
<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">target_package</span><span class="plain-syntax">) &amp;&amp; (</span><span class="identifier-syntax">target_package</span><span class="plain-syntax"> != </span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">migrant</span><span class="plain-syntax">)) {</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">target_package</span><span class="plain-syntax"> = </span><a href="2-pck.html#SP3" class="function-link"><span class="function-syntax">Inter::Packages::parent</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">target_package</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">target_package</span><span class="plain-syntax"> == </span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">migrant</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><span class="named-paragraph-container code-font"><a href="2-trn.html#SP4_1" class="named-paragraph-link"><span class="named-paragraph">Correct the origin reference to this migrant symbol</span><span class="named-paragraph-number">4.1</span></a></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>
<p class="commentary firstcommentary"><a id="SP4_1" class="paragraph-anchor"></a><b>&#167;4.1. </b><span class="named-paragraph-container code-font"><span class="named-paragraph-defn">Correct the origin reference to this migrant symbol</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="reserved-syntax">inter_symbol</span><span class="plain-syntax"> *</span><span class="identifier-syntax">equivalent</span><span class="plain-syntax"> = </span><a href="2-trn.html#SP1" class="function-link"><span class="function-syntax">Inter::Transmigration::cached_equivalent</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">target</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">equivalent</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">TEMPORARY_TEXT</span><span class="plain-syntax">(</span><span class="identifier-syntax">URL</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><a href="2-st.html#SP11" class="function-link"><span class="function-syntax">InterSymbolsTables::symbol_to_url_name</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">URL</span><span class="plain-syntax">, </span><span class="identifier-syntax">target</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">equivalent</span><span class="plain-syntax"> = </span><a href="2-cnn.html#SP1" class="function-link"><span class="function-syntax">Inter::Connectors::plug</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">ipct</span><span class="plain-syntax">-&gt;</span><span class="element-syntax">origin_tree</span><span class="plain-syntax">, </span><span class="identifier-syntax">URL</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">URL</span><span class="plain-syntax">)</span>
<span class="plain-syntax"> </span><a href="2-trn.html#SP1" class="function-link"><span class="function-syntax">Inter::Transmigration::cache</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">target</span><span class="plain-syntax">, </span><span class="identifier-syntax">equivalent</span><span class="plain-syntax">);</span>
<span class="plain-syntax"> }</span>
<span class="plain-syntax"> </span><span class="identifier-syntax">symb</span><span class="plain-syntax">-&gt;</span><span class="identifier-syntax">equated_to</span><span class="plain-syntax"> = </span><span class="identifier-syntax">equivalent</span><span class="plain-syntax">;</span>
</pre>
<ul class="endnotetexts"><li>This code is used in <a href="2-trn.html#SP4">&#167;4</a>.</li></ul>
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