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3 <title>MayaChemTools:Code:Parsers::SimpleCalcYYLexer.pm</title>
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13 <pre>
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14 <a name="package-Parsers::SimpleCalcYYLexer-"></a> 1 <span class="k">package </span><span class="i">Parsers::SimpleCalcYYLexer</span><span class="sc">;</span>
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15 2 <span class="c">#</span>
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16 3 <span class="c"># $RCSfile: SimpleCalcYYLexer.pm,v $</span>
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17 4 <span class="c"># $Date: 2015/02/28 20:50:55 $</span>
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18 5 <span class="c"># $Revision: 1.9 $</span>
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19 6 <span class="c">#</span>
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20 7 <span class="c"># Author: Manish Sud <msud@san.rr.com></span>
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21 8 <span class="c">#</span>
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22 9 <span class="c"># Copyright (C) 2015 Manish Sud. All rights reserved.</span>
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23 10 <span class="c">#</span>
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24 11 <span class="c"># This file is part of MayaChemTools.</span>
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25 12 <span class="c">#</span>
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26 13 <span class="c"># MayaChemTools is free software; you can redistribute it and/or modify it under</span>
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27 14 <span class="c"># the terms of the GNU Lesser General Public License as published by the Free</span>
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28 15 <span class="c"># Software Foundation; either version 3 of the License, or (at your option) any</span>
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29 16 <span class="c"># later version.</span>
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30 17 <span class="c">#</span>
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31 18 <span class="c"># MayaChemTools is distributed in the hope that it will be useful, but without</span>
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32 19 <span class="c"># any warranty; without even the implied warranty of merchantability of fitness</span>
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33 20 <span class="c"># for a particular purpose. See the GNU Lesser General Public License for more</span>
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34 21 <span class="c"># details.</span>
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35 22 <span class="c">#</span>
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36 23 <span class="c"># You should have received a copy of the GNU Lesser General Public License</span>
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37 24 <span class="c"># along with MayaChemTools; if not, see <http://www.gnu.org/licenses/> or</span>
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38 25 <span class="c"># write to the Free Software Foundation Inc., 59 Temple Place, Suite 330,</span>
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39 26 <span class="c"># Boston, MA, 02111-1307, USA.</span>
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40 27 <span class="c">#</span>
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41 28
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42 29 <span class="k">use</span> <span class="w">strict</span><span class="sc">;</span>
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43 30 <span class="k">use</span> <span class="w">Carp</span><span class="sc">;</span>
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44 31 <span class="k">use</span> <span class="w">Exporter</span><span class="sc">;</span>
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45 32 <span class="k">use</span> <span class="w">Scalar::Util</span> <span class="s">(</span><span class="s">)</span><span class="sc">;</span>
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46 33 <span class="k">use</span> <span class="w">Parsers::YYLexer</span><span class="sc">;</span>
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47 34
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48 35 <span class="k">use</span> <span class="w">vars</span> <span class="q">qw(@ISA @EXPORT @EXPORT_OK %EXPORT_TAGS)</span><span class="sc">;</span>
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49 36
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50 37 <span class="i">@ISA</span> = <span class="q">qw(Parsers::YYLexer Exporter)</span><span class="sc">;</span>
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51 38 <span class="i">@EXPORT</span> = <span class="q">qw()</span><span class="sc">;</span>
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52 39 <span class="i">@EXPORT_OK</span> = <span class="q">qw()</span><span class="sc">;</span>
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53 40
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54 41 <span class="i">%EXPORT_TAGS</span> = <span class="s">(</span><span class="w">all</span> <span class="cm">=></span> <span class="s">[</span><span class="i">@EXPORT</span><span class="cm">,</span> <span class="i">@EXPORT_OK</span><span class="s">]</span><span class="s">)</span><span class="sc">;</span>
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55 42
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56 43 <span class="c"># Setup class variables...</span>
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57 44 <span class="k">my</span><span class="s">(</span><span class="i">$ClassName</span><span class="cm">,</span> <span class="i">$YYTabFile</span><span class="cm">,</span> <span class="i">@YYLexerTokensSpec</span><span class="s">)</span><span class="sc">;</span>
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58 45 <span class="i">_InitializeClass</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
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59 46
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60 47 <span class="c"># Overload Perl functions...</span>
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61 48 <span class="k">use</span> <span class="w">overload</span> <span class="q">'""'</span> <span class="cm">=></span> <span class="q">'StringifySimpleCalcYYLexer'</span><span class="sc">;</span>
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62 49
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63 50 <span class="c"># Class constructor...</span>
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64 <a name="new-"></a> 51 <span class="k">sub </span><span class="m">new</span> <span class="s">{</span>
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65 52 <span class="k">my</span><span class="s">(</span><span class="i">$Class</span><span class="cm">,</span> <span class="i">$Input</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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66 53 <span class="k">my</span><span class="s">(</span><span class="i">@TokensSpec</span><span class="s">)</span><span class="sc">;</span>
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67 54
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68 55 <span class="c"># Initialize object...</span>
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69 56 <span class="k">my</span> <span class="i">$This</span> = <span class="i">$Class</span><span class="i">->SUPER::new</span><span class="s">(</span><span class="i">$Input</span><span class="cm">,</span> <span class="i">@YYLexerTokensSpec</span><span class="s">)</span><span class="sc">;</span>
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70 57 <span class="k">bless</span> <span class="i">$This</span><span class="cm">,</span> <span class="k">ref</span><span class="s">(</span><span class="i">$Class</span><span class="s">)</span> || <span class="i">$Class</span><span class="sc">;</span>
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71 58 <span class="i">$This</span><span class="i">->_InitializeYYLexer</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
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72 59
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73 60 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
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74 61 <span class="s">}</span>
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75 62
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76 63 <span class="c"># Initialize object data...</span>
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77 64 <span class="c">#</span>
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78 <a name="_InitializeYYLexer-"></a> 65 <span class="k">sub </span><span class="m">_InitializeYYLexer</span> <span class="s">{</span>
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79 66 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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80 67
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81 68 <span class="c"># Setup default YYTabFile containing mapping of token names to numbers...</span>
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82 69 <span class="i">$This</span><span class="i">->SetupYYTabFile</span><span class="s">(</span><span class="i">$YYTabFile</span><span class="s">)</span><span class="sc">;</span>
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83 70
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84 71 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
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85 72 <span class="s">}</span>
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86 73
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87 74 <span class="c"># Initialize class ...</span>
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88 <a name="_InitializeClass-"></a> 75 <span class="k">sub </span><span class="m">_InitializeClass</span> <span class="s">{</span>
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89 76 <span class="c">#Class name...</span>
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90 77 <span class="i">$ClassName</span> = <span class="w">__PACKAGE__</span><span class="sc">;</span>
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91 78
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92 79 <span class="c"># Setup default token table file...</span>
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93 80 <span class="i">$YYTabFile</span> = <span class="q">"Parsers/SimpleCalcParser.tab.ph"</span><span class="sc">;</span>
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94 81
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95 82 <span class="c"># Setup default lexer tokens specs...</span>
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96 83 <span class="i">@YYLexerTokensSpec</span> = <span class="s">(</span>
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97 84 <span class="s">[</span> <span class="q">'LETTER'</span><span class="cm">,</span> <span class="q">qr/[a-zA-Z]/</span> <span class="s">]</span><span class="cm">,</span>
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98 85 <span class="s">[</span> <span class="q">'NUMBER'</span><span class="cm">,</span> <span class="q">qr/\d+/</span> <span class="s">]</span><span class="cm">,</span>
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99 86 <span class="s">[</span> <span class="q">'SPACE'</span><span class="cm">,</span> <span class="q">qr/[ ]*/</span><span class="cm">,</span> <span class="k">sub</span> <span class="s">{</span> <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$TokenLabel</span><span class="cm">,</span> <span class="i">$MatchedText</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> <span class="k">return</span> <span class="q">''</span><span class="sc">;</span> <span class="s">}</span> <span class="s">]</span><span class="cm">,</span>
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100 87 <span class="s">[</span> <span class="q">'NEWLINE'</span><span class="cm">,</span> <span class="q">qr/(?:\r\n|\r|\n)/</span><span class="cm">,</span> <span class="k">sub</span> <span class="s">{</span> <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$TokenLabel</span><span class="cm">,</span> <span class="i">$MatchedText</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> <span class="k">return</span> <span class="q">"\n"</span><span class="sc">;</span> <span class="s">}</span> <span class="s">]</span><span class="cm">,</span>
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101 88 <span class="s">[</span> <span class="q">'CHAR'</span><span class="cm">,</span> <span class="q">qr/./</span> <span class="s">]</span>
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102 89 <span class="s">)</span><span class="sc">;</span>
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103 90 <span class="s">}</span>
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104 91
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105 92 <span class="c"># Is it a lexer object?</span>
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106 <a name="_IsSimpleCalcYYLexer-"></a> 93 <span class="k">sub </span><span class="m">_IsSimpleCalcYYLexer</span> <span class="s">{</span>
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107 94 <span class="k">my</span><span class="s">(</span><span class="i">$Object</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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108 95
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109 96 <span class="k">return</span> <span class="s">(</span><span class="i">Scalar::Util::blessed</span><span class="s">(</span><span class="i">$Object</span><span class="s">)</span> && <span class="i">$Object</span><span class="i">->isa</span><span class="s">(</span><span class="i">$ClassName</span><span class="s">)</span><span class="s">)</span> ? <span class="n">1</span> <span class="co">:</span> <span class="n">0</span><span class="sc">;</span>
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110 97 <span class="s">}</span>
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111 98
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112 99 <span class="c"># Return a string containing information about lexer...</span>
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113 <a name="StringifySimpleCalcYYLexer-"></a> 100 <span class="k">sub </span><span class="m">StringifySimpleCalcYYLexer</span> <span class="s">{</span>
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114 101 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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115 102 <span class="k">my</span><span class="s">(</span><span class="i">$SimleCalcYYLexerString</span><span class="s">)</span><span class="sc">;</span>
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116 103
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117 104 <span class="i">$SimleCalcYYLexerString</span> = <span class="q">"SimpleCalcYYLexer: PackageName: $ClassName; "</span> . <span class="i">$This</span><span class="i">->_GetYYLexerInfoString</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
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118 105
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119 106 <span class="k">return</span> <span class="i">$SimleCalcYYLexerString</span><span class="sc">;</span>
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120 107 <span class="s">}</span>
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121 108
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122 <a name="EOF-"></a></pre>
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123 <p> </p>
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124 <br />
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125 <center>
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126 <img src="../../../images/h2o2.png">
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127 </center>
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128 </body>
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129 </html>
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