----------------------------------------------------------------------------+
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--+
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-- Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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-- All rights reserved.+
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-- Contact: Nokia Corporation (qt-info@nokia.com)+
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--+
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-- This file is part of the QtCore module of the Qt Toolkit.+
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--+
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-- $QT_BEGIN_LICENSE:LGPL$+
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-- No Commercial Usage+
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-- This file contains pre-release code and may not be distributed.+
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-- You may use this file in accordance with the terms and conditions+
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-- contained in the Technology Preview License Agreement accompanying+
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-- this package.+
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--+
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-- GNU Lesser General Public License Usage+
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-- Alternatively, this file may be used under the terms of the GNU Lesser+
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-- General Public License version 2.1 as published by the Free Software+
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-- Foundation and appearing in the file LICENSE.LGPL included in the+
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-- packaging of this file.  Please review the following information to+
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-- ensure the GNU Lesser General Public License version 2.1 requirements+
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-- will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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--+
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-- In addition, as a special exception, Nokia gives you certain additional+
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-- rights.  These rights are described in the Nokia Qt LGPL Exception+
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-- version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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--+
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-- If you have questions regarding the use of this file, please contact+
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-- Nokia at qt-info@nokia.com.+
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--+
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--+
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--+
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--+
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--+
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--+
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--+
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--+
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-- $QT_END_LICENSE$+
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--+
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----------------------------------------------------------------------------+
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+
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%parser calc_grammar+
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%decl calc_parser.h+
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%impl calc_parser.cpp+
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+
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%token_prefix Token_+
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%token number+
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%token lparen+
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%token rparen+
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%token plus+
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%token minus+
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+
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%start Goal+
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+
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/:+
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#ifndef CALC_PARSER_H+
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#define CALC_PARSER_H+
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+
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#include "qparser.h"+
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#include "calc_grammar_p.h"+
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+
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class CalcParser: public QParser<CalcParser, $table>+
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{+
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public:+
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  int nextToken();+
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  void consumeRule(int ruleno);+
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};+
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+
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#endif // CALC_PARSER_H+
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:/+
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+
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+
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+
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+
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+
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/.+
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#include "calc_parser.h"+
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+
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#include <QtDebug>+
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#include <cstdlib>+
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+
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void CalcParser::consumeRule(int ruleno)+
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  {+
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    switch (ruleno) {+
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./+
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+
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Goal: Expression ;+
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/.+
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case $rule_number:+
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  qDebug() << "value:" << sym(1);+
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  break;+
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./+
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+
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PrimaryExpression: number ;+
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PrimaryExpression: lparen Expression rparen ;+
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/.+
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case $rule_number:+
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  sym(1) = sym (2);+
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  break;+
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./+
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+
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Expression: PrimaryExpression ;+
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+
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Expression: Expression plus PrimaryExpression;+
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/.+
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case $rule_number:+
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  sym(1) += sym (3);+
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  break;+
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./+
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+
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Expression: Expression minus PrimaryExpression;+
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/.+
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case $rule_number:+
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  sym(1) -= sym (3);+
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  break;+
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./+
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+
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+
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+
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/.+
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    } // switch+
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}+
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+
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#include <cstdio>+
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+
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int main()+
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{+
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  CalcParser p;+
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+
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  if (p.parse())+
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    printf("ok\n");+
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}+
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./+
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