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1 ---------------------------------------------------------------------------- |
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2 -- |
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3 -- Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 -- All rights reserved. |
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5 -- Contact: Nokia Corporation (qt-info@nokia.com) |
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6 -- |
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7 -- This file is part of the QtCore module of the Qt Toolkit. |
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8 -- |
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9 -- $QT_BEGIN_LICENSE:LGPL$ |
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10 -- No Commercial Usage |
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11 -- This file contains pre-release code and may not be distributed. |
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12 -- You may use this file in accordance with the terms and conditions |
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13 -- contained in the Technology Preview License Agreement accompanying |
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14 -- this package. |
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15 -- |
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16 -- GNU Lesser General Public License Usage |
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17 -- Alternatively, this file may be used under the terms of the GNU Lesser |
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18 -- General Public License version 2.1 as published by the Free Software |
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19 -- Foundation and appearing in the file LICENSE.LGPL included in the |
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20 -- packaging of this file. Please review the following information to |
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21 -- ensure the GNU Lesser General Public License version 2.1 requirements |
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22 -- will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 -- |
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24 -- In addition, as a special exception, Nokia gives you certain additional |
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25 -- rights. These rights are described in the Nokia Qt LGPL Exception |
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26 -- version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 -- |
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28 -- If you have questions regarding the use of this file, please contact |
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29 -- Nokia at qt-info@nokia.com. |
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30 -- |
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31 -- |
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32 -- |
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33 -- |
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34 -- |
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35 -- |
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36 -- |
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37 -- |
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38 -- $QT_END_LICENSE$ |
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39 -- |
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40 ---------------------------------------------------------------------------- |
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41 |
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42 %parser calc_grammar |
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43 %decl calc_parser.h |
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44 %impl calc_parser.cpp |
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45 |
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46 %token_prefix Token_ |
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47 %token number |
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48 %token lparen |
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49 %token rparen |
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50 %token plus |
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51 %token minus |
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52 |
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53 %start Goal |
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54 |
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55 /: |
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56 #ifndef CALC_PARSER_H |
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57 #define CALC_PARSER_H |
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58 |
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59 #include "qparser.h" |
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60 #include "calc_grammar_p.h" |
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61 |
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62 class CalcParser: public QParser<CalcParser, $table> |
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63 { |
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64 public: |
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65 int nextToken(); |
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66 void consumeRule(int ruleno); |
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67 }; |
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68 |
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69 #endif // CALC_PARSER_H |
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70 :/ |
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71 |
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72 |
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73 |
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74 |
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75 |
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76 /. |
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77 #include "calc_parser.h" |
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78 |
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79 #include <QtDebug> |
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80 #include <cstdlib> |
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81 |
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82 void CalcParser::consumeRule(int ruleno) |
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83 { |
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84 switch (ruleno) { |
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85 ./ |
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86 |
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87 Goal: Expression ; |
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88 /. |
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89 case $rule_number: |
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90 qDebug() << "value:" << sym(1); |
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91 break; |
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92 ./ |
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93 |
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94 PrimaryExpression: number ; |
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95 PrimaryExpression: lparen Expression rparen ; |
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96 /. |
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97 case $rule_number: |
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98 sym(1) = sym (2); |
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99 break; |
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100 ./ |
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101 |
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102 Expression: PrimaryExpression ; |
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103 |
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104 Expression: Expression plus PrimaryExpression; |
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105 /. |
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106 case $rule_number: |
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107 sym(1) += sym (3); |
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108 break; |
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109 ./ |
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110 |
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111 Expression: Expression minus PrimaryExpression; |
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112 /. |
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113 case $rule_number: |
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114 sym(1) -= sym (3); |
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115 break; |
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116 ./ |
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117 |
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118 |
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119 |
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120 /. |
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121 } // switch |
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122 } |
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123 |
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124 #include <cstdio> |
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125 |
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126 int main() |
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127 { |
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128 CalcParser p; |
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129 |
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130 if (p.parse()) |
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131 printf("ok\n"); |
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132 } |
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133 ./ |