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<!--Weave of 'Stacked Variables' generated by 7-->
<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../compiler.html">Inform7 Modules</a></li><li><a href="index.html">core</a></li><li><a href="index.html#21">Chapter 21: Rules and Rulebooks</a></li><li><b>Stacked Variables</b></li></ul><p class="purpose">To permit variables to have scopes intermediate between local and global: for example, to be shared by all rules in a given rulebook.</p>
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<ul class="toc"><li><a href="#SP1">&#167;1. Definitions</a></li></ul><hr class="tocbar">
<p class="inwebparagraph"><a id="SP1"></a><b>&#167;1. Definitions. </b></p>
<pre class="display">
<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">stacked_variable</span><span class="plain"> {</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="identifier">wording</span><span class="plain"> </span><span class="identifier">name</span><span class="plain">; </span><span class="comment"> text of the name</span>
<span class="reserved">struct</span><span class="plain"> </span><span class="identifier">parse_node</span><span class="plain"> *</span><span class="identifier">assigned_at</span><span class="plain">; </span><span class="comment"> sentence assigning it</span>
<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">nonlocal_variable</span><span class="plain"> *</span><span class="identifier">underlying_var</span><span class="plain">; </span><span class="comment"> the variable in question</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">owner_id</span><span class="plain">; </span><span class="comment"> who owns this</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">offset_in_owning_frame</span><span class="plain">; </span><span class="comment"> word offset of storage (counts from 0)</span>
<span class="reserved">struct</span><span class="plain"> </span><span class="identifier">wording</span><span class="plain"> </span><span class="identifier">match_wording_text</span><span class="plain">; </span><span class="comment"> matching text (relevant for action variables only)</span>
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<span class="identifier">MEMORY_MANAGEMENT</span>
<span class="plain">} </span><span class="reserved">stacked_variable</span><span class="plain">;</span>
<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">stacked_variable_list</span><span class="plain"> {</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="identifier">the_stv</span><span class="plain">; </span><span class="comment"> the STV</span>
<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">stacked_variable_list</span><span class="plain"> *</span><span class="identifier">next</span><span class="plain">; </span><span class="comment"> in linked list</span>
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<span class="identifier">MEMORY_MANAGEMENT</span>
<span class="plain">} </span><span class="reserved">stacked_variable_list</span><span class="plain">;</span>
<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">stacked_variable_owner</span><span class="plain"> {</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">no_stvs</span><span class="plain">;</span>
<span class="reserved">int</span><span class="plain"> </span><span class="identifier">recognition_id</span><span class="plain">;</span>
<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">stacked_variable_list</span><span class="plain"> *</span><span class="identifier">list_of_stvs</span><span class="plain">;</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="identifier">inter_name</span><span class="plain"> *</span><span class="identifier">stvo_iname</span><span class="plain">;</span>
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<span class="identifier">MEMORY_MANAGEMENT</span>
<span class="plain">} </span><span class="reserved">stacked_variable_owner</span><span class="plain">;</span>
<span class="reserved">typedef</span><span class="plain"> </span><span class="reserved">struct</span><span class="plain"> </span><span class="reserved">stacked_variable_owner_list</span><span class="plain"> {</span>
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<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">stacked_variable_owner</span><span class="plain"> *</span><span class="identifier">stvo</span><span class="plain">; </span><span class="comment"> the STO</span>
<span class="reserved">struct</span><span class="plain"> </span><span class="reserved">stacked_variable_owner_list</span><span class="plain"> *</span><span class="identifier">next</span><span class="plain">; </span><span class="comment"> in linked list</span>
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<span class="identifier">MEMORY_MANAGEMENT</span>
<span class="plain">} </span><span class="reserved">stacked_variable_owner_list</span><span class="plain">;</span>
</pre>
<p class="inwebparagraph"></p>
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<p class="endnote">The structure stacked_variable is accessed in 2/sq, 2/si, 5/ins, 5/nv, 8/ef, 9/ma, 9/pk, 11/sm, 14/lv, 14/ds2, 15/pr, 15/ep, 15/vp, 15/spr, 16/in, 16/cmw, 17/rs, 19/tc, 19/tb, 19/tod, 20/eq, 21/rl, 21/rl2, 21/fao, 21/rps, 21/ac, 22/pu, 22/dptd, 22/po, 22/pav, 25/cii, 26/uo, 26/ts and here.</p>
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<p class="endnote">The structure stacked_variable_list is accessed in 3/pd, 5/lp, 5/ut, 5/un, 5/ins, 6/rlt, 6/nv, 7/ns, 7/oaf, 7/rs, 9/tfa, 9/tbath, 9/rpt, 9/tc, 9/ma, 9/rk, 9/ass, 9/imp, 9/pd, 10/teav, 10/cap, 11/ap, 11/pr, 11/bas, 11/tc, 11/sm, 12/dtd, 12/cdp, 14/rv, 14/lv, 14/cn, 14/ds, 14/ds2, 15/cp, 16/is, 16/in, 19/tb, 19/rsft, 19/tod, 20/eq, 21/rl, 21/rl2, 21/fao, 21/rps, 21/ac, 22/ph, 22/tp, 22/tp2, 23/ad, 24/lv, 24/sf, 25/in, 25/pi, 25/cii, 25/cp, 26/uo, 26/tti, 26/pc, 26/ts, 27/cm and here.</p>
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<p class="endnote">The structure stacked_variable_owner is private to this section.</p>
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<p class="endnote">The structure stacked_variable_owner_list is accessed in 3/pd, 5/lp, 5/ut, 5/un, 5/ins, 6/rlt, 6/nv, 7/ns, 7/oaf, 7/rs, 9/tfa, 9/tbath, 9/rpt, 9/tc, 9/ma, 9/rk, 9/ass, 9/imp, 9/pd, 10/teav, 10/cap, 11/ap, 11/pr, 11/bas, 11/tc, 11/sm, 12/dtd, 12/cdp, 14/rv, 14/lv, 14/cn, 14/ds, 14/ds2, 15/cp, 16/is, 16/in, 19/tb, 19/rsft, 19/tod, 20/eq, 21/rl, 21/rl2, 21/fao, 21/rps, 21/ac, 22/ph, 22/tp, 22/tp2, 23/ad, 24/lv, 24/sf, 25/in, 25/pi, 25/cii, 25/cp, 26/uo, 26/tti, 26/pc, 26/ts, 27/cm and here.</p>
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<p class="inwebparagraph"><a id="SP2"></a><b>&#167;2. </b></p>
<pre class="display">
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">max_frame_size_needed</span><span class="plain"> = </span><span class="constant">0</span><span class="plain">;</span>
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</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP3"></a><b>&#167;3. </b></p>
<pre class="display">
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<span class="reserved">nonlocal_variable_emission</span><span class="plain"> </span><span class="functiontext">StackedVariables::how_to_lvalue<button class="popup" onclick="togglePopup('usagePopup1626')">...<span class="popuptext" id="usagePopup1626">Usage of <b>StackedVariables::how_to_lvalue</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="identifier">stv</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">stv</span><span class="plain">-&gt;</span><span class="identifier">owner_id</span><span class="plain"> == </span><span class="constant">ACTION_PROCESSING_RB</span><span class="plain">) &amp;&amp; (</span><span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">offset_in_owning_frame</span><span class="plain"> == </span><span class="constant">0</span><span class="plain">))</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="functiontext"><a href="5-nv.html#SP11">NonlocalVariables::nve_from_iname</a></span><span class="plain">(</span><span class="functiontext"><a href="27-hr.html#SP4">Hierarchy::find</a></span><span class="plain">(</span><span class="constant">ACTOR_HL</span><span class="plain">));</span>
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<span class="reserved">else</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="functiontext"><a href="5-nv.html#SP11">NonlocalVariables::nve_from_mstack</a></span><span class="plain">(</span><span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">owner_id</span><span class="plain">, </span><span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">offset_in_owning_frame</span><span class="plain">, </span><span class="identifier">FALSE</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="reserved">nonlocal_variable_emission</span><span class="plain"> </span><span class="functiontext">StackedVariables::how_to_rvalue<button class="popup" onclick="togglePopup('usagePopup1627')">...<span class="popuptext" id="usagePopup1627">Usage of <b>StackedVariables::how_to_rvalue</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="identifier">stv</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">stv</span><span class="plain">-&gt;</span><span class="identifier">owner_id</span><span class="plain"> == </span><span class="constant">ACTION_PROCESSING_RB</span><span class="plain">) &amp;&amp; (</span><span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">offset_in_owning_frame</span><span class="plain"> == </span><span class="constant">0</span><span class="plain">))</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="functiontext"><a href="5-nv.html#SP11">NonlocalVariables::nve_from_iname</a></span><span class="plain">(</span><span class="functiontext"><a href="27-hr.html#SP4">Hierarchy::find</a></span><span class="plain">(</span><span class="constant">ACTOR_HL</span><span class="plain">));</span>
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<span class="reserved">else</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="functiontext"><a href="5-nv.html#SP11">NonlocalVariables::nve_from_mstack</a></span><span class="plain">(</span><span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">owner_id</span><span class="plain">, </span><span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">offset_in_owning_frame</span><span class="plain">, </span><span class="identifier">TRUE</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">StackedVariables::get_owner_id<button class="popup" onclick="togglePopup('usagePopup1628')">...<span class="popuptext" id="usagePopup1628">Usage of <b>StackedVariables::get_owner_id</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="identifier">stv</span><span class="plain">) {</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">owner_id</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">StackedVariables::get_offset<button class="popup" onclick="togglePopup('usagePopup1629')">...<span class="popuptext" id="usagePopup1629">Usage of <b>StackedVariables::get_offset</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="identifier">stv</span><span class="plain">) {</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">offset_in_owning_frame</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="identifier">kind</span><span class="plain"> *</span><span class="functiontext">StackedVariables::get_kind<button class="popup" onclick="togglePopup('usagePopup1630')">...<span class="popuptext" id="usagePopup1630">Usage of <b>StackedVariables::get_kind</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="identifier">stv</span><span class="plain">) {</span>
<span class="reserved">nonlocal_variable</span><span class="plain"> *</span><span class="identifier">nlv</span><span class="plain"> = </span><span class="functiontext"><a href="#SP3">StackedVariables::get_variable</a></span><span class="plain">(</span><span class="identifier">stv</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain"> </span><span class="functiontext"><a href="5-nv.html#SP19">NonlocalVariables::kind</a></span><span class="plain">(</span><span class="identifier">nlv</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="reserved">nonlocal_variable</span><span class="plain"> *</span><span class="functiontext">StackedVariables::get_variable<button class="popup" onclick="togglePopup('usagePopup1631')">...<span class="popuptext" id="usagePopup1631">Usage of <b>StackedVariables::get_variable</b>:<br><a href="#SP3_1">&#167;3.1</a>, <a href="#SP3_2">&#167;3.2</a>, Type Expressions and Values - <a href="10-teav.html#SP16">&#167;16</a></span></button></span><span class="plain">(</span><span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="identifier">stv</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">stv</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">underlying_var</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">StackedVariables::set_matching_text<button class="popup" onclick="togglePopup('usagePopup1632')">...<span class="popuptext" id="usagePopup1632">Usage of <b>StackedVariables::set_matching_text</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="identifier">stv</span><span class="plain">, </span><span class="identifier">wording</span><span class="plain"> </span><span class="identifier">W</span><span class="plain">) {</span>
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<span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">match_wording_text</span><span class="plain"> = </span><span class="identifier">W</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="identifier">wording</span><span class="plain"> </span><span class="functiontext">StackedVariables::get_matching_text<button class="popup" onclick="togglePopup('usagePopup1633')">...<span class="popuptext" id="usagePopup1633">Usage of <b>StackedVariables::get_matching_text</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="identifier">stv</span><span class="plain">) {</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">match_wording_text</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="functiontext">StackedVariables::parse_match_clause<button class="popup" onclick="togglePopup('usagePopup1634')">...<span class="popuptext" id="usagePopup1634">Usage of <b>StackedVariables::parse_match_clause</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">stacked_variable_owner</span><span class="plain"> *</span><span class="identifier">stvo</span><span class="plain">,</span>
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<span class="identifier">wording</span><span class="plain"> </span><span class="identifier">W</span><span class="plain">) {</span>
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<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">stacked_variable_list</span><span class="plain"> *</span><span class="identifier">stvl</span><span class="plain"> = </span><span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">list_of_stvs</span><span class="plain">; </span><span class="identifier">stvl</span><span class="plain">; </span><span class="identifier">stvl</span><span class="plain"> = </span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain">)</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Wordings::starts_with</span><span class="plain">(</span><span class="identifier">W</span><span class="plain">, </span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">the_stv</span><span class="plain">-&gt;</span><span class="element">match_wording_text</span><span class="plain">))</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">the_stv</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
<span class="plain">}</span>
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<span class="reserved">stacked_variable_owner</span><span class="plain"> *</span><span class="functiontext">StackedVariables::new_owner<button class="popup" onclick="togglePopup('usagePopup1635')">...<span class="popuptext" id="usagePopup1635">Usage of <b>StackedVariables::new_owner</b>:<br>Rulebooks - <a href="21-rl2.html#SP10">&#167;10</a><br>Activities - <a href="21-ac.html#SP6">&#167;6</a></span></button></span><span class="plain">(</span><span class="reserved">int</span><span class="plain"> </span><span class="identifier">id</span><span class="plain">) {</span>
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<span class="reserved">stacked_variable_owner</span><span class="plain"> *</span><span class="identifier">stvo</span><span class="plain"> = </span><span class="identifier">CREATE</span><span class="plain">(</span><span class="reserved">stacked_variable_owner</span><span class="plain">);</span>
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<span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">recognition_id</span><span class="plain"> = </span><span class="identifier">id</span><span class="plain">;</span>
<span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">no_stvs</span><span class="plain"> = </span><span class="constant">0</span><span class="plain">;</span>
<span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">list_of_stvs</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
<span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">stvo_iname</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">stvo</span><span class="plain">;</span>
<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">StackedVariables::owner_empty<button class="popup" onclick="togglePopup('usagePopup1636')">...<span class="popuptext" id="usagePopup1636">Usage of <b>StackedVariables::owner_empty</b>:<br>Rulebooks - <a href="21-rl2.html#SP14">&#167;14</a>, <a href="21-rl2.html#SP14_1">&#167;14.1</a><br>Activities - <a href="21-ac.html#SP8">&#167;8</a></span></button></span><span class="plain">(</span><span class="reserved">stacked_variable_owner</span><span class="plain"> *</span><span class="identifier">stvo</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="identifier">no_stvs</span><span class="plain"> == </span><span class="constant">0</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">FALSE</span><span class="plain">;</span>
<span class="plain">}</span>
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<span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="functiontext">StackedVariables::add_empty<button class="popup" onclick="togglePopup('usagePopup1637')">...<span class="popuptext" id="usagePopup1637">Usage of <b>StackedVariables::add_empty</b>:<br>Rulebooks - <a href="21-rl2.html#SP14">&#167;14</a><br>Activities - <a href="21-ac.html#SP8">&#167;8</a></span></button></span><span class="plain">(</span><span class="reserved">stacked_variable_owner</span><span class="plain"> *</span><span class="identifier">stvo</span><span class="plain">,</span>
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<span class="identifier">wording</span><span class="plain"> </span><span class="identifier">W</span><span class="plain">, </span><span class="identifier">kind</span><span class="plain"> *</span><span class="identifier">K</span><span class="plain">) {</span>
<span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="identifier">stv</span><span class="plain"> = </span><span class="identifier">CREATE</span><span class="plain">(</span><span class="reserved">stacked_variable</span><span class="plain">);</span>
<span class="reserved">nonlocal_variable</span><span class="plain"> *</span><span class="identifier">q</span><span class="plain">;</span>
<span class="identifier">W</span><span class="plain"> = </span><span class="identifier">Articles::remove_the</span><span class="plain">(</span><span class="identifier">W</span><span class="plain">);</span>
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<span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">name</span><span class="plain"> = </span><span class="identifier">W</span><span class="plain">;</span>
<span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">owner_id</span><span class="plain"> = </span><span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">recognition_id</span><span class="plain">;</span>
<span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">offset_in_owning_frame</span><span class="plain"> = </span><span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">no_stvs</span><span class="plain">++;</span>
<span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">assigned_at</span><span class="plain"> = </span><span class="identifier">current_sentence</span><span class="plain">;</span>
<span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">match_wording_text</span><span class="plain"> = </span><span class="identifier">EMPTY_WORDING</span><span class="plain">;</span>
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<span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">list_of_stvs</span><span class="plain"> = </span><span class="functiontext"><a href="#SP3">StackedVariables::add_to_list</a></span><span class="plain">(</span><span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">list_of_stvs</span><span class="plain">, </span><span class="identifier">stv</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="identifier">no_stvs</span><span class="plain"> &gt; </span><span class="identifier">max_frame_size_needed</span><span class="plain">)</span>
<span class="identifier">max_frame_size_needed</span><span class="plain"> = </span><span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">no_stvs</span><span class="plain">;</span>
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<span class="identifier">q</span><span class="plain"> = </span><span class="functiontext"><a href="5-nv.html#SP6">NonlocalVariables::new_stacked</a></span><span class="plain">(</span><span class="identifier">W</span><span class="plain">, </span><span class="identifier">K</span><span class="plain">, </span><span class="identifier">stv</span><span class="plain">);</span>
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<span class="identifier">stv</span><span class="plain">-&gt;</span><span class="element">underlying_var</span><span class="plain"> = </span><span class="identifier">q</span><span class="plain">;</span>
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<span class="functiontext"><a href="5-nv.html#SP11">NonlocalVariables::set_I6_identifier</a></span><span class="plain">(</span><span class="identifier">q</span><span class="plain">, </span><span class="identifier">FALSE</span><span class="plain">, </span><span class="functiontext"><a href="#SP3">StackedVariables::how_to_rvalue</a></span><span class="plain">(</span><span class="identifier">stv</span><span class="plain">));</span>
<span class="functiontext"><a href="5-nv.html#SP11">NonlocalVariables::set_I6_identifier</a></span><span class="plain">(</span><span class="identifier">q</span><span class="plain">, </span><span class="identifier">TRUE</span><span class="plain">, </span><span class="functiontext"><a href="#SP3">StackedVariables::how_to_lvalue</a></span><span class="plain">(</span><span class="identifier">stv</span><span class="plain">));</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">stv</span><span class="plain">;</span>
<span class="plain">}</span>
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<span class="reserved">stacked_variable_owner_list</span><span class="plain"> *</span><span class="functiontext">StackedVariables::add_owner_to_list<button class="popup" onclick="togglePopup('usagePopup1638')">...<span class="popuptext" id="usagePopup1638">Usage of <b>StackedVariables::add_owner_to_list</b>:<br>Rulebooks - <a href="21-rl2.html#SP10">&#167;10</a>, <a href="21-rl2.html#SP14">&#167;14</a></span></button></span><span class="plain">(</span><span class="reserved">stacked_variable_owner_list</span><span class="plain"> *</span><span class="identifier">stvol</span><span class="plain">,</span>
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<span class="reserved">stacked_variable_owner</span><span class="plain"> *</span><span class="identifier">stvo</span><span class="plain">) {</span>
<span class="reserved">stacked_variable_owner_list</span><span class="plain"> *</span><span class="identifier">ostvol</span><span class="plain"> = </span><span class="identifier">stvol</span><span class="plain">;</span>
<span class="reserved">while</span><span class="plain"> (</span><span class="identifier">stvol</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">stvol</span><span class="plain">-&gt;</span><span class="identifier">stvo</span><span class="plain"> == </span><span class="identifier">stvo</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">ostvol</span><span class="plain">;</span>
<span class="reserved">stacked_variable_owner_list</span><span class="plain"> *</span><span class="identifier">nxt</span><span class="plain"> = </span><span class="identifier">stvol</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">nxt</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">break</span><span class="plain">;</span>
<span class="identifier">stvol</span><span class="plain"> = </span><span class="identifier">nxt</span><span class="plain">;</span>
<span class="plain">}</span>
<span class="reserved">stacked_variable_owner_list</span><span class="plain"> *</span><span class="identifier">nstvol</span><span class="plain"> = </span><span class="identifier">CREATE</span><span class="plain">(</span><span class="reserved">stacked_variable_owner_list</span><span class="plain">);</span>
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<span class="identifier">nstvol</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
<span class="identifier">nstvol</span><span class="plain">-&gt;</span><span class="element">stvo</span><span class="plain"> = </span><span class="identifier">stvo</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">stvol</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">nstvol</span><span class="plain">;</span>
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<span class="identifier">stvol</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain"> = </span><span class="identifier">nstvol</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">ostvol</span><span class="plain">;</span>
<span class="plain">}</span>
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<span class="reserved">stacked_variable_owner_list</span><span class="plain"> *</span><span class="functiontext">StackedVariables::append_owner_list<button class="popup" onclick="togglePopup('usagePopup1639')">...<span class="popuptext" id="usagePopup1639">Usage of <b>StackedVariables::append_owner_list</b>:<br>Rules - <a href="21-rl.html#SP16">&#167;16</a></span></button></span><span class="plain">(</span><span class="reserved">stacked_variable_owner_list</span><span class="plain"> *</span><span class="identifier">stvol</span><span class="plain">,</span>
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<span class="reserved">stacked_variable_owner_list</span><span class="plain"> *</span><span class="identifier">extras</span><span class="plain">) {</span>
<span class="identifier">LOGIF</span><span class="plain">(</span><span class="identifier">RULEBOOK_COMPILATION</span><span class="plain">,</span>
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<span class="string">"Appending list %08x to list %08x\n"</span><span class="plain">, (</span><span class="reserved">int</span><span class="plain">) </span><span class="identifier">extras</span><span class="plain">, (</span><span class="reserved">int</span><span class="plain">) </span><span class="identifier">stvol</span><span class="plain">);</span>
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<span class="reserved">stacked_variable_owner_list</span><span class="plain"> *</span><span class="identifier">new_head</span><span class="plain"> = </span><span class="identifier">stvol</span><span class="plain">;</span>
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<span class="reserved">for</span><span class="plain"> (; </span><span class="identifier">extras</span><span class="plain">; </span><span class="identifier">extras</span><span class="plain"> = </span><span class="identifier">extras</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain">)</span>
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<span class="identifier">new_head</span><span class="plain"> = </span><span class="functiontext"><a href="#SP3">StackedVariables::add_owner_to_list</a></span><span class="plain">(</span><span class="identifier">new_head</span><span class="plain">, </span><span class="identifier">extras</span><span class="plain">-&gt;</span><span class="element">stvo</span><span class="plain">);</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">new_head</span><span class="plain">;</span>
<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">StackedVariables::list_length<button class="popup" onclick="togglePopup('usagePopup1640')">...<span class="popuptext" id="usagePopup1640">Usage of <b>StackedVariables::list_length</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">stacked_variable_list</span><span class="plain"> *</span><span class="identifier">stvl</span><span class="plain">) {</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">l</span><span class="plain"> = </span><span class="constant">0</span><span class="plain">;</span>
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<span class="reserved">while</span><span class="plain"> (</span><span class="identifier">stvl</span><span class="plain">) {</span>
<span class="identifier">l</span><span class="plain">++;</span>
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<span class="identifier">stvl</span><span class="plain"> = </span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain">;</span>
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<span class="plain">}</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">l</span><span class="plain">;</span>
<span class="plain">}</span>
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<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">StackedVariables::index_owner<button class="popup" onclick="togglePopup('usagePopup1641')">...<span class="popuptext" id="usagePopup1641">Usage of <b>StackedVariables::index_owner</b>:<br>none</span></button></span><span class="plain">(</span><span class="identifier">OUTPUT_STREAM</span><span class="plain">, </span><span class="reserved">stacked_variable_owner</span><span class="plain"> *</span><span class="identifier">stvo</span><span class="plain">) {</span>
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<span class="reserved">stacked_variable_list</span><span class="plain"> *</span><span class="identifier">stvl</span><span class="plain">;</span>
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<span class="reserved">for</span><span class="plain"> (</span><span class="identifier">stvl</span><span class="plain">=</span><span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">list_of_stvs</span><span class="plain">; </span><span class="identifier">stvl</span><span class="plain">; </span><span class="identifier">stvl</span><span class="plain"> = </span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain">)</span>
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="identifier">the_stv</span><span class="plain">) &amp;&amp; (</span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">the_stv</span><span class="plain">-&gt;</span><span class="element">underlying_var</span><span class="plain">)) {</span>
<span class="identifier">HTMLFiles::open_para</span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="constant">2</span><span class="plain">, </span><span class="string">"tight"</span><span class="plain">);</span>
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<span class="functiontext"><a href="5-nv.html#SP28">NonlocalVariables::index_single</a></span><span class="plain">(</span><span class="identifier">OUT</span><span class="plain">, </span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">the_stv</span><span class="plain">-&gt;</span><span class="element">underlying_var</span><span class="plain">);</span>
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<span class="identifier">HTML_CLOSE</span><span class="plain">(</span><span class="string">"p"</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="plain">}</span>
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<span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="functiontext">StackedVariables::parse_from_owner_list<button class="popup" onclick="togglePopup('usagePopup1642')">...<span class="popuptext" id="usagePopup1642">Usage of <b>StackedVariables::parse_from_owner_list</b>:<br>Type Expressions and Values - <a href="10-teav.html#SP16">&#167;16</a></span></button></span><span class="plain">(</span><span class="reserved">stacked_variable_owner_list</span><span class="plain"> *</span><span class="identifier">stvol</span><span class="plain">, </span><span class="identifier">wording</span><span class="plain"> </span><span class="identifier">W</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Wordings::empty</span><span class="plain">(</span><span class="identifier">W</span><span class="plain">)) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
<span class="identifier">W</span><span class="plain"> = </span><span class="identifier">Articles::remove_the</span><span class="plain">(</span><span class="identifier">W</span><span class="plain">);</span>
<span class="reserved">while</span><span class="plain"> (</span><span class="identifier">stvol</span><span class="plain">) {</span>
<span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="identifier">stv</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">stvol</span><span class="plain">-&gt;</span><span class="identifier">stvo</span><span class="plain">) </span><span class="identifier">stv</span><span class="plain"> = </span><span class="functiontext"><a href="#SP3">StackedVariables::parse_from_list</a></span><span class="plain">(</span><span class="identifier">stvol</span><span class="plain">-&gt;</span><span class="element">stvo</span><span class="plain">-&gt;</span><span class="element">list_of_stvs</span><span class="plain">, </span><span class="identifier">W</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">stv</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">stv</span><span class="plain">;</span>
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<span class="identifier">stvol</span><span class="plain"> = </span><span class="identifier">stvol</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain">;</span>
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<span class="plain">}</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
<span class="plain">}</span>
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<span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="functiontext">StackedVariables::parse_from_list<button class="popup" onclick="togglePopup('usagePopup1643')">...<span class="popuptext" id="usagePopup1643">Usage of <b>StackedVariables::parse_from_list</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">stacked_variable_list</span><span class="plain"> *</span><span class="identifier">stvl</span><span class="plain">, </span><span class="identifier">wording</span><span class="plain"> </span><span class="identifier">W</span><span class="plain">) {</span>
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<span class="reserved">while</span><span class="plain"> (</span><span class="identifier">stvl</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Wordings::match</span><span class="plain">(</span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">the_stv</span><span class="plain">-&gt;</span><span class="element">name</span><span class="plain">, </span><span class="identifier">W</span><span class="plain">))</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">the_stv</span><span class="plain">;</span>
<span class="identifier">stvl</span><span class="plain"> = </span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain">;</span>
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<span class="plain">}</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">NULL</span><span class="plain">;</span>
<span class="plain">}</span>
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<span class="reserved">stacked_variable_list</span><span class="plain"> *</span><span class="functiontext">StackedVariables::add_to_list<button class="popup" onclick="togglePopup('usagePopup1644')">...<span class="popuptext" id="usagePopup1644">Usage of <b>StackedVariables::add_to_list</b>:<br>none</span></button></span><span class="plain">(</span><span class="reserved">stacked_variable_list</span><span class="plain"> *</span><span class="identifier">stvl</span><span class="plain">,</span>
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<span class="reserved">stacked_variable</span><span class="plain"> *</span><span class="identifier">stv</span><span class="plain">) {</span>
<span class="reserved">stacked_variable_list</span><span class="plain"> *</span><span class="identifier">nstvl</span><span class="plain"> = </span><span class="identifier">CREATE</span><span class="plain">(</span><span class="reserved">stacked_variable_list</span><span class="plain">), *</span><span class="identifier">ostvl</span><span class="plain"> = </span><span class="identifier">stvl</span><span class="plain">;</span>
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<span class="identifier">nstvl</span><span class="plain">-&gt;</span><span class="element">the_stv</span><span class="plain"> = </span><span class="identifier">stv</span><span class="plain">;</span>
<span class="identifier">nstvl</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">stvl</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="identifier">nstvl</span><span class="plain">;</span>
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<span class="reserved">while</span><span class="plain"> (</span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain">) </span><span class="identifier">stvl</span><span class="plain"> = </span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain">;</span>
<span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain"> = </span><span class="identifier">nstvl</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">ostvl</span><span class="plain">;</span>
<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">StackedVariables::compile_frame_creator<button class="popup" onclick="togglePopup('usagePopup1645')">...<span class="popuptext" id="usagePopup1645">Usage of <b>StackedVariables::compile_frame_creator</b>:<br>Rulebooks - <a href="21-rl2.html#SP14">&#167;14</a><br>Activities - <a href="21-ac.html#SP8">&#167;8</a></span></button></span><span class="plain">(</span><span class="reserved">stacked_variable_owner</span><span class="plain"> *</span><span class="identifier">stvo</span><span class="plain">, </span><span class="identifier">inter_name</span><span class="plain"> *</span><span class="identifier">iname</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">stvo</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain"> </span><span class="constant">0</span><span class="plain">;</span>
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<span class="identifier">packaging_state</span><span class="plain"> </span><span class="identifier">save</span><span class="plain"> = </span><span class="functiontext"><a href="26-rt.html#SP1">Routines::begin</a></span><span class="plain">(</span><span class="identifier">iname</span><span class="plain">);</span>
<span class="identifier">inter_symbol</span><span class="plain"> *</span><span class="identifier">pos_s</span><span class="plain"> = </span><span class="functiontext"><a href="24-lv.html#SP11">LocalVariables::add_named_call_as_symbol</a></span><span class="plain">(</span><span class="identifier">I</span><span class="string">"pos"</span><span class="plain">);</span>
<span class="identifier">inter_symbol</span><span class="plain"> *</span><span class="identifier">state_s</span><span class="plain"> = </span><span class="functiontext"><a href="24-lv.html#SP11">LocalVariables::add_named_call_as_symbol</a></span><span class="plain">(</span><span class="identifier">I</span><span class="string">"state"</span><span class="plain">);</span>
<span class="identifier">Produce::inv_primitive</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">IFELSE_BIP</span><span class="plain">);</span>
<span class="identifier">Produce::down</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
<span class="identifier">Produce::inv_primitive</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">EQ_BIP</span><span class="plain">);</span>
<span class="identifier">Produce::down</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
<span class="identifier">Produce::val_symbol</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">K_value</span><span class="plain">, </span><span class="identifier">state_s</span><span class="plain">);</span>
<span class="identifier">Produce::val</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">K_number</span><span class="plain">, </span><span class="identifier">LITERAL_IVAL</span><span class="plain">, </span><span class="constant">1</span><span class="plain">);</span>
<span class="identifier">Produce::up</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
<span class="identifier">Produce::code</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
<span class="identifier">Produce::down</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
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&lt;<span class="cwebmacro">Compile frame creator if state is set</span> <span class="cwebmacronumber">3.1</span>&gt;<span class="plain">;</span>
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<span class="identifier">Produce::up</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
<span class="identifier">Produce::code</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
<span class="identifier">Produce::down</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
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&lt;<span class="cwebmacro">Compile frame creator if state is clear</span> <span class="cwebmacronumber">3.2</span>&gt;<span class="plain">;</span>
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<span class="identifier">Produce::up</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
<span class="identifier">Produce::up</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">count</span><span class="plain"> = </span><span class="constant">0</span><span class="plain">;</span>
<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">stacked_variable_list</span><span class="plain"> *</span><span class="identifier">stvl</span><span class="plain"> = </span><span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">list_of_stvs</span><span class="plain">; </span><span class="identifier">stvl</span><span class="plain">; </span><span class="identifier">stvl</span><span class="plain"> = </span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain">) </span><span class="identifier">count</span><span class="plain">++;</span>
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<span class="identifier">Produce::inv_primitive</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">RETURN_BIP</span><span class="plain">);</span>
<span class="identifier">Produce::down</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
<span class="identifier">Produce::val</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">K_number</span><span class="plain">, </span><span class="identifier">LITERAL_IVAL</span><span class="plain">, (</span><span class="identifier">inter_t</span><span class="plain">) </span><span class="identifier">count</span><span class="plain">);</span>
<span class="identifier">Produce::up</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
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<span class="functiontext"><a href="26-rt.html#SP4">Routines::end</a></span><span class="plain">(</span><span class="identifier">save</span><span class="plain">);</span>
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<span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">stvo_iname</span><span class="plain"> = </span><span class="identifier">iname</span><span class="plain">;</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">count</span><span class="plain">;</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="inwebparagraph"><a id="SP3_1"></a><b>&#167;3.1. </b><code class="display">
&lt;<span class="cwebmacrodefn">Compile frame creator if state is set</span> <span class="cwebmacronumber">3.1</span>&gt; =
</code></p>
<pre class="displaydefn">
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<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">stacked_variable_list</span><span class="plain"> *</span><span class="identifier">stvl</span><span class="plain"> = </span><span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">list_of_stvs</span><span class="plain">; </span><span class="identifier">stvl</span><span class="plain">; </span><span class="identifier">stvl</span><span class="plain"> = </span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain">) {</span>
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<span class="reserved">nonlocal_variable</span><span class="plain"> *</span><span class="identifier">q</span><span class="plain"> = </span><span class="functiontext"><a href="#SP3">StackedVariables::get_variable</a></span><span class="plain">(</span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">the_stv</span><span class="plain">);</span>
<span class="identifier">kind</span><span class="plain"> *</span><span class="identifier">K</span><span class="plain"> = </span><span class="functiontext"><a href="5-nv.html#SP19">NonlocalVariables::kind</a></span><span class="plain">(</span><span class="identifier">q</span><span class="plain">);</span>
<span class="identifier">Produce::inv_primitive</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">STORE_BIP</span><span class="plain">);</span>
<span class="identifier">Produce::down</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
<span class="identifier">Produce::inv_primitive</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">LOOKUPREF_BIP</span><span class="plain">);</span>
<span class="identifier">Produce::down</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
<span class="identifier">Produce::val_iname</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">K_value</span><span class="plain">, </span><span class="functiontext"><a href="27-hr.html#SP4">Hierarchy::find</a></span><span class="plain">(</span><span class="constant">MSTACK_HL</span><span class="plain">));</span>
<span class="identifier">Produce::val_symbol</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">K_value</span><span class="plain">, </span><span class="identifier">pos_s</span><span class="plain">);</span>
<span class="identifier">Produce::up</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Kinds::Behaviour::uses_pointer_values</span><span class="plain">(</span><span class="identifier">K</span><span class="plain">))</span>
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<span class="functiontext"><a href="13-rsfk.html#SP19">Kinds::RunTime::emit_heap_allocation</a></span><span class="plain">(</span><span class="functiontext"><a href="13-rsfk.html#SP19">Kinds::RunTime::make_heap_allocation</a></span><span class="plain">(</span><span class="identifier">K</span><span class="plain">, </span><span class="constant">1</span><span class="plain">, -1));</span>
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<span class="reserved">else</span>
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<span class="functiontext"><a href="5-nv.html#SP25">NonlocalVariables::emit_initial_value_as_val</a></span><span class="plain">(</span><span class="identifier">q</span><span class="plain">);</span>
<span class="identifier">Produce::up</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
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<span class="identifier">Produce::inv_primitive</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">POSTINCREMENT_BIP</span><span class="plain">);</span>
<span class="identifier">Produce::down</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
<span class="identifier">Produce::ref_symbol</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">K_value</span><span class="plain">, </span><span class="identifier">pos_s</span><span class="plain">);</span>
<span class="identifier">Produce::up</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
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<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">This code is used in <a href="#SP3">&#167;3</a>.</p>
<p class="inwebparagraph"><a id="SP3_2"></a><b>&#167;3.2. </b><code class="display">
&lt;<span class="cwebmacrodefn">Compile frame creator if state is clear</span> <span class="cwebmacronumber">3.2</span>&gt; =
</code></p>
<pre class="displaydefn">
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<span class="reserved">for</span><span class="plain"> (</span><span class="reserved">stacked_variable_list</span><span class="plain"> *</span><span class="identifier">stvl</span><span class="plain"> = </span><span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">list_of_stvs</span><span class="plain">; </span><span class="identifier">stvl</span><span class="plain">; </span><span class="identifier">stvl</span><span class="plain"> = </span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">next</span><span class="plain">) {</span>
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<span class="reserved">nonlocal_variable</span><span class="plain"> *</span><span class="identifier">q</span><span class="plain"> = </span><span class="functiontext"><a href="#SP3">StackedVariables::get_variable</a></span><span class="plain">(</span><span class="identifier">stvl</span><span class="plain">-&gt;</span><span class="element">the_stv</span><span class="plain">);</span>
<span class="identifier">kind</span><span class="plain"> *</span><span class="identifier">K</span><span class="plain"> = </span><span class="functiontext"><a href="5-nv.html#SP19">NonlocalVariables::kind</a></span><span class="plain">(</span><span class="identifier">q</span><span class="plain">);</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">Kinds::Behaviour::uses_pointer_values</span><span class="plain">(</span><span class="identifier">K</span><span class="plain">)) {</span>
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<span class="identifier">Produce::inv_call_iname</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="functiontext"><a href="27-hr.html#SP4">Hierarchy::find</a></span><span class="plain">(</span><span class="constant">BLKVALUEFREE_HL</span><span class="plain">));</span>
<span class="identifier">Produce::down</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
<span class="identifier">Produce::inv_primitive</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">LOOKUP_BIP</span><span class="plain">);</span>
<span class="identifier">Produce::down</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
<span class="identifier">Produce::val_iname</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">K_value</span><span class="plain">, </span><span class="functiontext"><a href="27-hr.html#SP4">Hierarchy::find</a></span><span class="plain">(</span><span class="constant">MSTACK_HL</span><span class="plain">));</span>
<span class="identifier">Produce::val_symbol</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">K_value</span><span class="plain">, </span><span class="identifier">pos_s</span><span class="plain">);</span>
<span class="identifier">Produce::up</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
<span class="identifier">Produce::up</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
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<span class="plain">}</span>
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<span class="identifier">Produce::inv_primitive</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">POSTINCREMENT_BIP</span><span class="plain">);</span>
<span class="identifier">Produce::down</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
<span class="identifier">Produce::ref_symbol</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">(), </span><span class="identifier">K_value</span><span class="plain">, </span><span class="identifier">pos_s</span><span class="plain">);</span>
<span class="identifier">Produce::up</span><span class="plain">(</span><span class="functiontext"><a href="27-em.html#SP2">Emit::tree</a></span><span class="plain">());</span>
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<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">This code is used in <a href="#SP3">&#167;3</a>.</p>
<p class="inwebparagraph"><a id="SP4"></a><b>&#167;4. </b></p>
<pre class="display">
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<span class="identifier">inter_name</span><span class="plain"> *</span><span class="functiontext">StackedVariables::frame_creator<button class="popup" onclick="togglePopup('usagePopup1646')">...<span class="popuptext" id="usagePopup1646">Usage of <b>StackedVariables::frame_creator</b>:<br>Rulebooks - <a href="21-rl2.html#SP14">&#167;14</a><br>Activities - <a href="21-ac.html#SP8">&#167;8</a></span></button></span><span class="plain">(</span><span class="reserved">stacked_variable_owner</span><span class="plain"> *</span><span class="identifier">stvo</span><span class="plain">) {</span>
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<span class="reserved">return</span><span class="plain"> </span><span class="identifier">stvo</span><span class="plain">-&gt;</span><span class="element">stvo_iname</span><span class="plain">;</span>
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<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
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