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<a name="package-Parsers::SimpleCalcParser-"></a>   1 <span class="k">package </span><span class="i">Parsers::SimpleCalcParser</span><span class="sc">;</span>
   2 <span class="c">#</span>
   3 <span class="c"># $RCSfile: SimpleCalcParser.yy,v $</span>
   4 <span class="c"># $Date: 2015/02/28 20:50:55 $</span>
   5 <span class="c"># $Revision: 1.10 $</span>
   6 <span class="c">#</span>
   7 <span class="c"># Author: Manish Sud &lt;msud@san.rr.com&gt;</span>
   8 <span class="c">#</span>
   9 <span class="c"># Copyright (C) 2015 Manish Sud. All rights reserved.</span>
  10 <span class="c">#</span>
  11 <span class="c"># This file is part of MayaChemTools.</span>
  12 <span class="c">#</span>
  13 <span class="c"># MayaChemTools is free software; you can redistribute it and/or modify it under</span>
  14 <span class="c"># the terms of the GNU Lesser General Public License as published by the Free</span>
  15 <span class="c"># Software Foundation; either version 3 of the License, or (at your option) any</span>
  16 <span class="c"># later version.</span>
  17 <span class="c">#</span>
  18 <span class="c"># MayaChemTools is distributed in the hope that it will be useful, but without</span>
  19 <span class="c"># any warranty; without even the implied warranty of merchantability of fitness</span>
  20 <span class="c"># for a particular purpose.  See the GNU Lesser General Public License for more</span>
  21 <span class="c"># details.</span>
  22 <span class="c">#</span>
  23 <span class="c"># You should have received a copy of the GNU Lesser General Public License</span>
  24 <span class="c"># along with MayaChemTools; if not, see &lt;http://www.gnu.org/licenses/&gt; or</span>
  25 <span class="c"># write to the Free Software Foundation Inc., 59 Temple Place, Suite 330,</span>
  26 <span class="c"># Boston, MA, 02111-1307, USA.</span>
  27 <span class="c">#</span>
  28 <span class="c">#</span>
  29 <span class="c"># A WORD TO THE WISE:</span>
  30 <span class="c">#</span>
  31 <span class="c"># The parser package and token table files, SimpleCalcParser.pm and</span>
  32 <span class="c">#  SimpleCalcParser.tab.ph, are automatically generated from parser grammar</span>
  33 <span class="c"># definition file, SimpleCalcParser.yy, using byacc available through perl-byacc1.8</span>
  34 <span class="c"># modified with perl5-byacc-patches-0.5 for generation of object oriented parser:</span>
  35 <span class="c">#</span>
  36 <span class="c">#    byacc -l -P -d -b SimpleCalcParser SimpleCalcParser.yy</span>
  37 <span class="c">#    mv SimpleCalcParser.tab.pl SimpleCalcParser.pm</span>
  38 <span class="c">#</span>
  39 
  40 <span class="k">use</span> <span class="w">Carp</span><span class="sc">;</span>
  41 
  42 <span class="c"># Setup a hash map for mapping of words/letters to values...</span>
  43 <span class="i">%LetterToValueMap</span> = <span class="s">(</span><span class="s">)</span><span class="sc">;</span>
  44 
  45 <span class="i">$NUMBER</span>=<span class="n">257</span><span class="sc">;</span>
  46 <span class="i">$LETTER</span>=<span class="n">258</span><span class="sc">;</span>
  47 <span class="i">$YYERRCODE</span>=<span class="n">256</span><span class="sc">;</span>
  48 <span class="i">@yylhs</span> = <span class="s">(</span>                                               <span class="n">-1</span><span class="cm">,</span>
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  50     <span class="n">2</span><span class="cm">,</span>    <span class="n">2</span><span class="cm">,</span>    <span class="n">2</span><span class="cm">,</span>
  51 <span class="s">)</span><span class="sc">;</span>
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  55 <span class="s">)</span><span class="sc">;</span>
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  60 <span class="s">)</span><span class="sc">;</span>
  61 <span class="i">@yydgoto</span> = <span class="s">(</span>                                              <span class="n">1</span><span class="cm">,</span>
  62     <span class="n">6</span><span class="cm">,</span>    <span class="n">7</span><span class="cm">,</span>
  63 <span class="s">)</span><span class="sc">;</span>
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  68 <span class="s">)</span><span class="sc">;</span>
  69 <span class="i">@yyrindex</span> = <span class="s">(</span>                                             <span class="n">0</span><span class="cm">,</span>
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  72    <span class="n">13</span><span class="cm">,</span>   <span class="n">-2</span><span class="cm">,</span>    <span class="n">5</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>
  73 <span class="s">)</span><span class="sc">;</span>
  74 <span class="i">@yygindex</span> = <span class="s">(</span>                                             <span class="n">0</span><span class="cm">,</span>
  75     <span class="n">0</span><span class="cm">,</span>   <span class="n">50</span><span class="cm">,</span>
  76 <span class="s">)</span><span class="sc">;</span>
  77 <span class="i">$YYTABLESIZE</span>=<span class="n">220</span><span class="sc">;</span>
  78 <span class="i">@yytable</span> = <span class="s">(</span>                                              <span class="n">5</span><span class="cm">,</span>
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  98     <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>
  99     <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>
 100     <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">0</span><span class="cm">,</span>    <span class="n">2</span><span class="cm">,</span>    <span class="n">3</span><span class="cm">,</span>    <span class="n">4</span><span class="cm">,</span>    <span class="n">3</span><span class="cm">,</span>   <span class="n">10</span><span class="cm">,</span>
 101 <span class="s">)</span><span class="sc">;</span>
 102 <span class="i">@yycheck</span> = <span class="s">(</span>                                             <span class="n">40</span><span class="cm">,</span>
 103    <span class="n">10</span><span class="cm">,</span>   <span class="n">40</span><span class="cm">,</span>   <span class="n">10</span><span class="cm">,</span>   <span class="n">61</span><span class="cm">,</span>   <span class="n">10</span><span class="cm">,</span>   <span class="n">37</span><span class="cm">,</span>   <span class="n">37</span><span class="cm">,</span>   <span class="n">10</span><span class="cm">,</span>   <span class="n">10</span><span class="cm">,</span>   <span class="n">41</span><span class="cm">,</span>
 104    <span class="n">42</span><span class="cm">,</span>   <span class="n">43</span><span class="cm">,</span>   <span class="n">10</span><span class="cm">,</span>   <span class="n">45</span><span class="cm">,</span>   <span class="n">10</span><span class="cm">,</span>   <span class="n">47</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">10</span><span class="cm">,</span>   <span class="n">37</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 105    <span class="n">37</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">10</span><span class="cm">,</span>   <span class="n">42</span><span class="cm">,</span>   <span class="n">43</span><span class="cm">,</span>   <span class="n">42</span><span class="cm">,</span>   <span class="n">45</span><span class="cm">,</span>   <span class="n">37</span><span class="cm">,</span>   <span class="n">47</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 106    <span class="n">47</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">42</span><span class="cm">,</span>   <span class="n">43</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">45</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">47</span><span class="cm">,</span>   <span class="n">41</span><span class="cm">,</span>   <span class="n">42</span><span class="cm">,</span>
 107    <span class="n">43</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">45</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">47</span><span class="cm">,</span>   <span class="n">41</span><span class="cm">,</span>   <span class="n">42</span><span class="cm">,</span>   <span class="n">43</span><span class="cm">,</span>   <span class="n">41</span><span class="cm">,</span>   <span class="n">45</span><span class="cm">,</span>
 108    <span class="n">43</span><span class="cm">,</span>   <span class="n">47</span><span class="cm">,</span>   <span class="n">45</span><span class="cm">,</span>   <span class="n">41</span><span class="cm">,</span>    <span class="n">5</span><span class="cm">,</span>   <span class="n">43</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">45</span><span class="cm">,</span>    <span class="n">9</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 109    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">13</span><span class="cm">,</span>   <span class="n">14</span><span class="cm">,</span>   <span class="n">15</span><span class="cm">,</span>   <span class="n">16</span><span class="cm">,</span>   <span class="n">17</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 110    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 111    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 112    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 113    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 114    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 115    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 116    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 117    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 118    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 119    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 120    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 121    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 122    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 123    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>
 124    <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>   <span class="n">-1</span><span class="cm">,</span>  <span class="n">256</span><span class="cm">,</span>  <span class="n">257</span><span class="cm">,</span>  <span class="n">258</span><span class="cm">,</span>  <span class="n">257</span><span class="cm">,</span>  <span class="n">258</span><span class="cm">,</span>
 125 <span class="s">)</span><span class="sc">;</span>
 126 <span class="i">$YYFINAL</span>=<span class="n">1</span><span class="sc">;</span>
 127 <span class="c">#ifndef YYDEBUG</span>
 128 <span class="c">#define YYDEBUG 0</span>
 129 <span class="c">#endif</span>
 130 <span class="i">$YYMAXTOKEN</span>=<span class="n">258</span><span class="sc">;</span>
 131 <span class="c">#if YYDEBUG</span>
 132 <span class="i">@yyname</span> = <span class="s">(</span>
 133 <span class="q">&quot;end-of-file&quot;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&quot;&#39;\\n&#39;&quot;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span>
 134 <span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&quot;&#39;%&#39;&quot;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&quot;&#39;(&#39;&quot;</span><span class="cm">,</span><span class="q">&quot;&#39;)&#39;&quot;</span><span class="cm">,</span><span class="q">&quot;&#39;*&#39;&quot;</span><span class="cm">,</span><span class="q">&quot;&#39;+&#39;&quot;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&quot;&#39;-&#39;&quot;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&quot;&#39;/&#39;&quot;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span>
 135 <span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&quot;&#39;=&#39;&quot;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span>
 136 <span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span>
 137 <span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span>
 138 <span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span>
 139 <span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span>
 140 <span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&#39;&#39;</span><span class="cm">,</span><span class="q">&quot;NUMBER&quot;</span><span class="cm">,</span><span class="q">&quot;LETTER&quot;</span><span class="cm">,</span>
 141 <span class="s">)</span><span class="sc">;</span>
 142 <span class="i">@yyrule</span> = <span class="s">(</span>
 143 <span class="q">&quot;\$accept : list&quot;</span><span class="cm">,</span>
 144 <span class="q">&quot;list :&quot;</span><span class="cm">,</span>
 145 <span class="q">&quot;list : list stat &#39;\\n&#39;&quot;</span><span class="cm">,</span>
 146 <span class="q">&quot;list : list error &#39;\\n&#39;&quot;</span><span class="cm">,</span>
 147 <span class="q">&quot;stat : expr&quot;</span><span class="cm">,</span>
 148 <span class="q">&quot;stat : LETTER &#39;=&#39; expr&quot;</span><span class="cm">,</span>
 149 <span class="q">&quot;expr : &#39;(&#39; expr &#39;)&#39;&quot;</span><span class="cm">,</span>
 150 <span class="q">&quot;expr : expr &#39;+&#39; expr&quot;</span><span class="cm">,</span>
 151 <span class="q">&quot;expr : expr &#39;-&#39; expr&quot;</span><span class="cm">,</span>
 152 <span class="q">&quot;expr : expr &#39;*&#39; expr&quot;</span><span class="cm">,</span>
 153 <span class="q">&quot;expr : expr &#39;/&#39; expr&quot;</span><span class="cm">,</span>
 154 <span class="q">&quot;expr : expr &#39;%&#39; expr&quot;</span><span class="cm">,</span>
 155 <span class="q">&quot;expr : NUMBER&quot;</span><span class="cm">,</span>
 156 <span class="q">&quot;expr : LETTER&quot;</span><span class="cm">,</span>
 157 <span class="s">)</span><span class="sc">;</span>
 158 <span class="c">#endif</span>
 159 
<a name="yyclearin-"></a> 160 <span class="k">sub </span><span class="m">yyclearin</span> <span class="s">{</span> <span class="i">$_</span>[<span class="n">0</span>]-&gt;{<span class="q">&#39;yychar&#39;</span>} = <span class="n">-1</span><span class="sc">;</span> <span class="s">}</span>
 161 
<a name="yyerrok-"></a> 162 <span class="k">sub </span><span class="m">yyerrok</span> <span class="s">{</span> <span class="i">$_</span>[<span class="n">0</span>]-&gt;{<span class="q">&#39;yyerrflag&#39;</span>} = <span class="n">0</span><span class="sc">;</span> <span class="s">}</span>
 163 
<a name="new-"></a> 164 <span class="k">sub </span><span class="m">new</span> <span class="s">{</span>
 165   <span class="k">my</span> <span class="i">$p</span> = <span class="s">{</span><span class="q">&#39;yylex&#39;</span> <span class="cm">=&gt;</span> <span class="i">$_</span>[<span class="n">1</span>]<span class="cm">,</span> <span class="q">&#39;yyerror&#39;</span> <span class="cm">=&gt;</span> <span class="i">$_</span>[<span class="n">2</span>]<span class="cm">,</span> <span class="q">&#39;yydebug&#39;</span> <span class="cm">=&gt;</span> <span class="i">$_</span>[<span class="n">3</span>]<span class="s">}</span><span class="sc">;</span>
 166   <span class="k">bless</span> <span class="i">$p</span><span class="cm">,</span> <span class="i">$_</span>[<span class="n">0</span>]<span class="sc">;</span>
 167 <span class="s">}</span>
 168 
<a name="YYERROR-"></a> 169 <span class="k">sub </span><span class="m">YYERROR</span> <span class="s">{</span> ++<span class="i">$_</span>[<span class="n">0</span>]-&gt;{<span class="q">&#39;yynerrs&#39;</span>}<span class="sc">;</span> <span class="i">$_</span>[<span class="n">0</span>]<span class="i">-&gt;yy_err_recover</span><span class="sc">;</span> <span class="s">}</span>
 170 
<a name="yy_err_recover-"></a> 171 <span class="k">sub </span><span class="m">yy_err_recover</span> <span class="s">{</span>
 172   <span class="c">#</span>
 173   <span class="c"># msud@san.rr.com:</span>
 174   <span class="c">#</span>
 175   <span class="c"># Turn off &quot;exiting&quot; warning to suppress the following warning at &quot;next yyloop&quot;:</span>
 176   <span class="c">#</span>
 177   <span class="c"># Exiting subroutine via next at &lt;LineNum&gt;</span>
 178   <span class="c">#</span>
 179   <span class="c"># The code does work as expected with or without turning off the warning.</span>
 180   <span class="c"># This method is invoked in yyparse method directly or indirectly in another</span>
 181   <span class="c"># method and Perl compilers ends up finding &quot;yyloop&quot; as the nearst enclosure</span>
 182   <span class="c"># label.</span>
 183   <span class="c">#</span>
 184   <span class="k">no</span> <span class="w">warnings</span> <span class="q">qw(exiting)</span><span class="sc">;</span>
 185 
 186   <span class="k">my</span> <span class="s">(</span><span class="i">$p</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
 187   <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyerrflag&#39;</span>} &lt; <span class="n">3</span><span class="s">)</span>
 188   <span class="s">{</span>
 189     <span class="i">$p</span>-&gt;{<span class="q">&#39;yyerrflag&#39;</span>} = <span class="n">3</span><span class="sc">;</span>
 190     <span class="k">while</span> <span class="s">(</span><span class="n">1</span><span class="s">)</span>
 191     <span class="s">{</span>
 192       <span class="k">if</span> <span class="s">(</span><span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} = <span class="i">$yysindex</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyss&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyssp&#39;</span>}]]<span class="s">)</span> &amp;&amp; 
 193           <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} += <span class="i">$YYERRCODE</span><span class="s">)</span> &gt;= <span class="n">0</span> &amp;&amp; 
 194           <span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} &lt; <span class="i">@yycheck</span> &amp;&amp;
 195           <span class="i">$yycheck</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>}] == <span class="i">$YYERRCODE</span><span class="s">)</span>
 196       <span class="s">{</span>
 197         <span class="k">warn</span><span class="s">(</span><span class="q">&quot;yydebug: state &quot;</span> . 
 198                      <span class="i">$p</span>-&gt;{<span class="q">&#39;yyss&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyssp&#39;</span>}] . 
 199                      <span class="q">&quot;, error recovery shifting to state&quot;</span> . 
 200                      <span class="i">$yytable</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>}] . <span class="q">&quot;\n&quot;</span><span class="s">)</span> 
 201                        <span class="k">if</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yydebug&#39;</span>}<span class="sc">;</span>
 202         <span class="i">$p</span>-&gt;{<span class="q">&#39;yyss&#39;</span>}-&gt;[++<span class="i">$p</span>-&gt;{<span class="q">&#39;yyssp&#39;</span>}] = 
 203           <span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>} = <span class="i">$yytable</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>}]<span class="sc">;</span>
 204         <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[++<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}] = <span class="i">$p</span>-&gt;{<span class="q">&#39;yylval&#39;</span>}<span class="sc">;</span>
 205         <span class="k">next</span> <span class="j">yyloop</span><span class="sc">;</span>
 206       <span class="s">}</span>
 207       <span class="k">else</span>
 208       <span class="s">{</span>
 209         <span class="k">warn</span><span class="s">(</span><span class="q">&quot;yydebug: error recovery discarding state &quot;</span>.
 210               <span class="i">$p</span>-&gt;{<span class="q">&#39;yyss&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyssp&#39;</span>}]. <span class="q">&quot;\n&quot;</span><span class="s">)</span> 
 211                 <span class="k">if</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yydebug&#39;</span>}<span class="sc">;</span>
 212         <span class="k">return</span><span class="s">(</span><span class="k">undef</span><span class="s">)</span> <span class="k">if</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yyssp&#39;</span>} &lt;= <span class="n">0</span><span class="sc">;</span>
 213         --<span class="i">$p</span>-&gt;{<span class="q">&#39;yyssp&#39;</span>}<span class="sc">;</span>
 214         --<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}<span class="sc">;</span>
 215       <span class="s">}</span>
 216     <span class="s">}</span>
 217   <span class="s">}</span>
 218   <span class="k">else</span>
 219   <span class="s">{</span>
 220     <span class="k">return</span> <span class="s">(</span><span class="k">undef</span><span class="s">)</span> <span class="k">if</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} == <span class="n">0</span><span class="sc">;</span>
 221     <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yydebug&#39;</span>}<span class="s">)</span>
 222     <span class="s">{</span>
 223       <span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>} = <span class="q">&#39;&#39;</span><span class="sc">;</span>
 224       <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} &lt;= <span class="i">$YYMAXTOKEN</span><span class="s">)</span> <span class="s">{</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>} = 
 225         <span class="i">$yyname</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>}]<span class="sc">;</span> <span class="s">}</span>
 226       <span class="k">if</span> <span class="s">(</span>!<span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>}<span class="s">)</span> <span class="s">{</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>} = <span class="q">&#39;illegal-symbol&#39;</span><span class="sc">;</span> <span class="s">}</span>
 227       <span class="k">warn</span><span class="s">(</span><span class="q">&quot;yydebug: state &quot;</span> . <span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>} . 
 228                    <span class="q">&quot;, error recovery discards &quot;</span> . 
 229                    <span class="q">&quot;token &quot;</span> . <span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} . <span class="q">&quot;(&quot;</span> . 
 230                    <span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>} . <span class="q">&quot;)\n&quot;</span><span class="s">)</span><span class="sc">;</span>
 231     <span class="s">}</span>
 232     <span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} = <span class="n">-1</span><span class="sc">;</span>
 233     <span class="k">next</span> <span class="j">yyloop</span><span class="sc">;</span>
 234   <span class="s">}</span>
 235 <span class="n">0</span><span class="sc">;</span>
 236 <span class="s">}</span> <span class="c"># yy_err_recover</span>
 237 
<a name="yyparse-"></a> 238 <span class="k">sub </span><span class="m">yyparse</span> <span class="s">{</span>
 239   <span class="k">my</span> <span class="s">(</span><span class="i">$p</span><span class="cm">,</span> <span class="i">$s</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
 240   <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>} = <span class="i">$ENV</span>{<span class="q">&#39;YYDEBUG&#39;</span>}<span class="s">)</span>
 241   <span class="s">{</span>
 242     <span class="i">$p</span>-&gt;{<span class="q">&#39;yydebug&#39;</span>} = <span class="k">int</span><span class="s">(</span><span class="i">$1</span><span class="s">)</span> <span class="k">if</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>} =~ <span class="q">/^(\d)/</span><span class="sc">;</span>
 243   <span class="s">}</span>
 244 
 245   <span class="i">$p</span>-&gt;{<span class="q">&#39;yynerrs&#39;</span>} = <span class="n">0</span><span class="sc">;</span>
 246   <span class="i">$p</span>-&gt;{<span class="q">&#39;yyerrflag&#39;</span>} = <span class="n">0</span><span class="sc">;</span>
 247   <span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} = <span class="s">(</span><span class="n">-1</span><span class="s">)</span><span class="sc">;</span>
 248 
 249   <span class="i">$p</span>-&gt;{<span class="q">&#39;yyssp&#39;</span>} = <span class="n">0</span><span class="sc">;</span>
 250   <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>} = <span class="n">0</span><span class="sc">;</span>
 251   <span class="i">$p</span>-&gt;{<span class="q">&#39;yyss&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyssp&#39;</span>}] = <span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>} = <span class="n">0</span><span class="sc">;</span>
 252 
 253   <span class="j">yyloop:</span> <span class="k">while</span><span class="s">(</span><span class="n">1</span><span class="s">)</span>
 254   <span class="s">{</span>
 255     <span class="j">yyreduce:</span> <span class="s">{</span>
 256       <span class="k">last</span> <span class="j">yyreduce</span> <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} = <span class="i">$yydefred</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>}]<span class="s">)</span><span class="sc">;</span>
 257       <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} &lt; <span class="n">0</span><span class="s">)</span>
 258       <span class="s">{</span>
 259         <span class="k">if</span> <span class="s">(</span><span class="s">(</span><span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>}<span class="cm">,</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yylval&#39;</span>}<span class="s">)</span> = 
 260             <span class="i">&amp;</span>{<span class="i">$p</span>-&gt;{<span class="q">&#39;yylex&#39;</span>}}<span class="s">(</span><span class="i">$s</span><span class="s">)</span><span class="s">)</span> &lt; <span class="n">0</span><span class="s">)</span> <span class="s">{</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} = <span class="n">0</span><span class="sc">;</span> <span class="s">}</span>
 261         <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yydebug&#39;</span>}<span class="s">)</span>
 262         <span class="s">{</span>
 263           <span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>} = <span class="q">&#39;&#39;</span><span class="sc">;</span>
 264           <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} &lt;= <span class="i">$#yyname</span><span class="s">)</span> 
 265              <span class="s">{</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>} = <span class="i">$yyname</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>}]<span class="sc">;</span> <span class="s">}</span>
 266           <span class="k">if</span> <span class="s">(</span>!<span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>}<span class="s">)</span> <span class="s">{</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>} = <span class="q">&#39;illegal-symbol&#39;</span><span class="sc">;</span> <span class="s">}</span><span class="sc">;</span>
 267           <span class="k">warn</span><span class="s">(</span><span class="q">&quot;yydebug: state &quot;</span> . <span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>} . 
 268                        <span class="q">&quot;, reading &quot;</span> . <span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} . <span class="q">&quot; (&quot;</span> . 
 269                        <span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>} . <span class="q">&quot;)\n&quot;</span><span class="s">)</span><span class="sc">;</span>
 270         <span class="s">}</span>
 271       <span class="s">}</span>
 272       <span class="k">if</span> <span class="s">(</span><span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} = <span class="i">$yysindex</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>}]<span class="s">)</span> &amp;&amp; 
 273           <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} += <span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>}<span class="s">)</span> &gt;= <span class="n">0</span> &amp;&amp; 
 274           <span class="i">$yycheck</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>}] == <span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>}<span class="s">)</span>
 275       <span class="s">{</span>
 276         <span class="k">warn</span><span class="s">(</span><span class="q">&quot;yydebug: state &quot;</span> . <span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>} . 
 277                      <span class="q">&quot;, shifting to state &quot;</span> .
 278               <span class="i">$yytable</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>}] . <span class="q">&quot;\n&quot;</span><span class="s">)</span> <span class="k">if</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yydebug&#39;</span>}<span class="sc">;</span>
 279         <span class="i">$p</span>-&gt;{<span class="q">&#39;yyss&#39;</span>}-&gt;[++<span class="i">$p</span>-&gt;{<span class="q">&#39;yyssp&#39;</span>}] = <span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>} = 
 280           <span class="i">$yytable</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>}]<span class="sc">;</span>
 281         <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[++<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}] = <span class="i">$p</span>-&gt;{<span class="q">&#39;yylval&#39;</span>}<span class="sc">;</span>
 282         <span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} = <span class="s">(</span><span class="n">-1</span><span class="s">)</span><span class="sc">;</span>
 283         --<span class="i">$p</span>-&gt;{<span class="q">&#39;yyerrflag&#39;</span>} <span class="k">if</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yyerrflag&#39;</span>} &gt; <span class="n">0</span><span class="sc">;</span>
 284         <span class="k">next</span> <span class="j">yyloop</span><span class="sc">;</span>
 285       <span class="s">}</span>
 286       <span class="k">if</span> <span class="s">(</span><span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} = <span class="i">$yyrindex</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>}]<span class="s">)</span> &amp;&amp; 
 287           <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} += <span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>}<span class="s">)</span> &gt;= <span class="n">0</span> &amp;&amp;
 288           <span class="i">$yycheck</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>}] == <span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>}<span class="s">)</span>
 289       <span class="s">{</span>
 290         <span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} = <span class="i">$yytable</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>}]<span class="sc">;</span>
 291         <span class="k">last</span> <span class="j">yyreduce</span><span class="sc">;</span>
 292       <span class="s">}</span>
 293       <span class="k">if</span> <span class="s">(</span>! <span class="i">$p</span>-&gt;{<span class="q">&#39;yyerrflag&#39;</span>}<span class="s">)</span> <span class="s">{</span>
 294         <span class="k">if</span> <span class="s">(</span> <span class="s">(</span><span class="k">defined</span><span class="s">(</span><span class="i">$EOI</span><span class="s">)</span> &amp;&amp; <span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} == <span class="i">$EOI</span><span class="s">)</span> || <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} == <span class="n">0</span><span class="s">)</span> <span class="s">)</span> <span class="s">{</span>
 295           <span class="i">&amp;</span>{<span class="i">$p</span>-&gt;{<span class="q">&#39;yyerror&#39;</span>}}<span class="s">(</span><span class="q">&quot;syntax error at or near the end of input text&quot;</span><span class="cm">,</span> <span class="i">$s</span><span class="s">)</span><span class="sc">;</span>
 296         <span class="s">}</span>
 297         <span class="k">else</span> <span class="s">{</span>
 298           <span class="i">&amp;</span>{<span class="i">$p</span>-&gt;{<span class="q">&#39;yyerror&#39;</span>}}<span class="s">(</span><span class="q">&quot;syntax error at or near input text: &#39;$p-&gt;{&#39;yylval&#39;}&#39;&quot;</span><span class="cm">,</span> <span class="i">$s</span><span class="s">)</span><span class="sc">;</span>
 299         <span class="s">}</span>
 300         ++<span class="i">$p</span>-&gt;{<span class="q">&#39;yynerrs&#39;</span>}<span class="sc">;</span>
 301       <span class="s">}</span>
 302       <span class="k">return</span><span class="s">(</span><span class="k">undef</span><span class="s">)</span> <span class="k">if</span> <span class="i">$p</span><span class="i">-&gt;yy_err_recover</span><span class="sc">;</span>
 303     <span class="s">}</span> <span class="c"># yyreduce</span>
 304     <span class="k">warn</span><span class="s">(</span><span class="q">&quot;yydebug: state &quot;</span> . <span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>} . 
 305                  <span class="q">&quot;, reducing by rule &quot;</span> . 
 306                  <span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} . <span class="q">&quot; (&quot;</span> . <span class="i">$yyrule</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>}] . 
 307                  <span class="q">&quot;)\n&quot;</span><span class="s">)</span> <span class="k">if</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yydebug&#39;</span>}<span class="sc">;</span>
 308     <span class="i">$p</span>-&gt;{<span class="q">&#39;yym&#39;</span>} = <span class="i">$yylen</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>}]<span class="sc">;</span>
 309     <span class="i">$p</span>-&gt;{<span class="q">&#39;yyval&#39;</span>} = <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}+<span class="n">1</span>-<span class="i">$p</span>-&gt;{<span class="q">&#39;yym&#39;</span>}]<span class="sc">;</span>
 310 
 311     <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} == <span class="n">2</span><span class="s">)</span> <span class="s">{</span>
 312     <span class="s">{</span>  <span class="i">$p</span>-&gt;{<span class="q">&#39;yyval&#39;</span>} = <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">1</span>]<span class="sc">;</span> <span class="s">}</span>
 313     <span class="s">}</span>
 314 
 315     <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} == <span class="n">3</span><span class="s">)</span> <span class="s">{</span>
 316     <span class="s">{</span> <span class="i">$p</span><span class="i">-&gt;yyerrok</span><span class="sc">;</span> <span class="i">$p</span><span class="i">-&gt;yyclearin</span><span class="sc">;</span> <span class="s">}</span>
 317     <span class="s">}</span>
 318 
 319     <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} == <span class="n">4</span><span class="s">)</span> <span class="s">{</span>
 320     <span class="s">{</span>  <span class="i">$ExprOut</span> = <span class="k">sprintf</span> <span class="q">&quot;%5i&quot;</span><span class="cm">,</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">0</span>]<span class="sc">;</span> <span class="k">print</span> <span class="q">&quot;$ExprOut\n&quot;</span><span class="sc">;</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yyval&#39;</span>} = <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">0</span>]<span class="sc">;</span> <span class="s">}</span>
 321     <span class="s">}</span>
 322 
 323     <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} == <span class="n">5</span><span class="s">)</span> <span class="s">{</span>
 324     <span class="s">{</span> <span class="i">$LetterToValueMap</span>{<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">2</span>]} = <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">0</span>]<span class="sc">;</span> <span class="s">}</span>
 325     <span class="s">}</span>
 326 
 327     <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} == <span class="n">6</span><span class="s">)</span> <span class="s">{</span>
 328     <span class="s">{</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yyval&#39;</span>} = <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">1</span>]<span class="sc">;</span> <span class="s">}</span>
 329     <span class="s">}</span>
 330 
 331     <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} == <span class="n">7</span><span class="s">)</span> <span class="s">{</span>
 332     <span class="s">{</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yyval&#39;</span>} = <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">2</span>] + <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">0</span>]<span class="sc">;</span> <span class="s">}</span>
 333     <span class="s">}</span>
 334 
 335     <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} == <span class="n">8</span><span class="s">)</span> <span class="s">{</span>
 336     <span class="s">{</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yyval&#39;</span>} = <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">2</span>] - <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">0</span>]<span class="sc">;</span> <span class="s">}</span>
 337     <span class="s">}</span>
 338 
 339     <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} == <span class="n">9</span><span class="s">)</span> <span class="s">{</span>
 340     <span class="s">{</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yyval&#39;</span>} = <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">2</span>] * <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">0</span>]<span class="sc">;</span> <span class="s">}</span>
 341     <span class="s">}</span>
 342 
 343     <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} == <span class="n">10</span><span class="s">)</span> <span class="s">{</span>
 344     <span class="s">{</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yyval&#39;</span>} = <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">2</span>] / <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">0</span>]<span class="sc">;</span> <span class="s">}</span>
 345     <span class="s">}</span>
 346 
 347     <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} == <span class="n">11</span><span class="s">)</span> <span class="s">{</span>
 348     <span class="s">{</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yyval&#39;</span>} = <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">2</span>] % <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">0</span>]<span class="sc">;</span> <span class="s">}</span>
 349     <span class="s">}</span>
 350 
 351     <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} == <span class="n">13</span><span class="s">)</span> <span class="s">{</span>
 352     <span class="s">{</span>
 353                           <span class="k">if</span> <span class="s">(</span><span class="k">exists</span> <span class="i">$LetterToValueMap</span>{<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">0</span>]}<span class="s">)</span> <span class="s">{</span>
 354                             <span class="i">$p</span>-&gt;{<span class="q">&#39;yyval&#39;</span>} = <span class="i">$LetterToValueMap</span>{<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">0</span>]}<span class="sc">;</span>
 355                           <span class="s">}</span>
 356                           <span class="k">else</span> <span class="s">{</span>
 357                             <span class="i">$Letter</span> = <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}-<span class="n">0</span>]<span class="sc">;</span>
 358                             <span class="k">print</span> <span class="q">&quot;Undefined variable $Letter encountered by SimpleCalcParser; Value set to 0\n&quot;</span><span class="sc">;</span>
 359                             <span class="i">$p</span>-&gt;{<span class="q">&#39;yyval&#39;</span>} = <span class="n">0</span><span class="sc">;</span>
 360                           <span class="s">}</span>
 361                         <span class="s">}</span>
 362     <span class="s">}</span>
 363     <span class="i">$p</span>-&gt;{<span class="q">&#39;yyssp&#39;</span>} -= <span class="i">$p</span>-&gt;{<span class="q">&#39;yym&#39;</span>}<span class="sc">;</span>
 364     <span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>} = <span class="i">$p</span>-&gt;{<span class="q">&#39;yyss&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyssp&#39;</span>}]<span class="sc">;</span>
 365     <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>} -= <span class="i">$p</span>-&gt;{<span class="q">&#39;yym&#39;</span>}<span class="sc">;</span>
 366     <span class="i">$p</span>-&gt;{<span class="q">&#39;yym&#39;</span>} = <span class="i">$yylhs</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>}]<span class="sc">;</span>
 367     <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>} == <span class="n">0</span> &amp;&amp; <span class="i">$p</span>-&gt;{<span class="q">&#39;yym&#39;</span>} == <span class="n">0</span><span class="s">)</span>
 368     <span class="s">{</span>
 369       <span class="k">warn</span><span class="s">(</span><span class="q">&quot;yydebug: after reduction, shifting from state 0 &quot;</span><span class="cm">,</span>
 370             <span class="q">&quot;to state $YYFINAL\n&quot;</span><span class="s">)</span> <span class="k">if</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yydebug&#39;</span>}<span class="sc">;</span>
 371       <span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>} = <span class="i">$YYFINAL</span><span class="sc">;</span>
 372       <span class="i">$p</span>-&gt;{<span class="q">&#39;yyss&#39;</span>}-&gt;[++<span class="i">$p</span>-&gt;{<span class="q">&#39;yyssp&#39;</span>}] = <span class="i">$YYFINAL</span><span class="sc">;</span>
 373       <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[++<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}] = <span class="i">$p</span>-&gt;{<span class="q">&#39;yyval&#39;</span>}<span class="sc">;</span>
 374       <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} &lt; <span class="n">0</span><span class="s">)</span>
 375       <span class="s">{</span>
 376         <span class="k">if</span> <span class="s">(</span><span class="s">(</span><span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>}<span class="cm">,</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yylval&#39;</span>}<span class="s">)</span> = 
 377             <span class="i">&amp;</span>{<span class="i">$p</span>-&gt;{<span class="q">&#39;yylex&#39;</span>}}<span class="s">(</span><span class="i">$s</span><span class="s">)</span><span class="s">)</span> &lt; <span class="n">0</span><span class="s">)</span> <span class="s">{</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} = <span class="n">0</span><span class="sc">;</span> <span class="s">}</span>
 378         <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yydebug&#39;</span>}<span class="s">)</span>
 379         <span class="s">{</span>
 380           <span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>} = <span class="q">&#39;&#39;</span><span class="sc">;</span>
 381           <span class="k">if</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} &lt;= <span class="i">$#yyname</span><span class="s">)</span> 
 382             <span class="s">{</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>} = <span class="i">$yyname</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>}]<span class="sc">;</span> <span class="s">}</span>
 383           <span class="k">if</span> <span class="s">(</span>!<span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>}<span class="s">)</span> <span class="s">{</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>} = <span class="q">&#39;illegal-symbol&#39;</span><span class="sc">;</span> <span class="s">}</span>
 384           <span class="k">warn</span><span class="s">(</span><span class="q">&quot;yydebug: state $YYFINAL, reading &quot;</span> . 
 385                <span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} . <span class="q">&quot; (&quot;</span> . <span class="i">$p</span>-&gt;{<span class="q">&#39;yys&#39;</span>} . <span class="q">&quot;)\n&quot;</span><span class="s">)</span><span class="sc">;</span>
 386         <span class="s">}</span>
 387       <span class="s">}</span>
 388       <span class="k">return</span> <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}-&gt;[<span class="n">1</span>]<span class="s">)</span> <span class="k">if</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yychar&#39;</span>} == <span class="n">0</span><span class="sc">;</span>
 389       <span class="k">next</span> <span class="j">yyloop</span><span class="sc">;</span>
 390     <span class="s">}</span>
 391     <span class="k">if</span> <span class="s">(</span><span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} = <span class="i">$yygindex</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yym&#39;</span>}]<span class="s">)</span> &amp;&amp; 
 392         <span class="s">(</span><span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} += <span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>}<span class="s">)</span> &gt;= <span class="n">0</span> &amp;&amp; 
 393         <span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>} &lt;= <span class="i">$#yycheck</span> &amp;&amp; 
 394         <span class="i">$yycheck</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>}] == <span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>}<span class="s">)</span>
 395     <span class="s">{</span>
 396         <span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>} = <span class="i">$yytable</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyn&#39;</span>}]<span class="sc">;</span>
 397     <span class="s">}</span> <span class="k">else</span> <span class="s">{</span>
 398         <span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>} = <span class="i">$yydgoto</span>[<span class="i">$p</span>-&gt;{<span class="q">&#39;yym&#39;</span>}]<span class="sc">;</span>
 399     <span class="s">}</span>
 400     <span class="k">warn</span><span class="s">(</span><span class="q">&quot;yydebug: after reduction, shifting from state &quot;</span> . 
 401         <span class="i">$p</span>-&gt;{<span class="q">&#39;yyss&#39;</span>}-&gt;[<span class="i">$p</span>-&gt;{<span class="q">&#39;yyssp&#39;</span>}] . <span class="q">&quot; to state &quot;</span> . 
 402         <span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>} . <span class="q">&quot;\n&quot;</span><span class="s">)</span> <span class="k">if</span> <span class="i">$p</span>-&gt;{<span class="q">&#39;yydebug&#39;</span>}<span class="sc">;</span>
 403     <span class="i">$p</span>-&gt;{<span class="q">&#39;yyss&#39;</span>}[++<span class="i">$p</span>-&gt;{<span class="q">&#39;yyssp&#39;</span>}] = <span class="i">$p</span>-&gt;{<span class="q">&#39;yystate&#39;</span>}<span class="sc">;</span>
 404     <span class="i">$p</span>-&gt;{<span class="q">&#39;yyvs&#39;</span>}[++<span class="i">$p</span>-&gt;{<span class="q">&#39;yyvsp&#39;</span>}] = <span class="i">$p</span>-&gt;{<span class="q">&#39;yyval&#39;</span>}<span class="sc">;</span>
 405   <span class="s">}</span> <span class="c"># yyloop</span>
 406 <span class="s">}</span> <span class="c"># yyparse</span>
 407 
 408 
 409 <span class="c"># yyerror function supplied to parser along with a lexer during initialization of</span>
 410 <span class="c"># the parser...</span>
 411 <span class="c">#</span>
 412 
<a name="yyerror-1-"></a> 413 <span class="k">sub </span><span class="m">yyerror</span> <span class="s">{</span>
 414     <span class="k">my</span> <span class="s">(</span><span class="i">$msg</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
 415     <span class="k">print</span> <span class="q">&quot;yyerror: $msg...\n&quot;</span><span class="sc">;</span>
 416 <span class="s">}</span>
 417 
<a name="EOF-"></a></pre>
<p>&nbsp;</p>
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