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----------------------------------------------------------------------------
--
-- Copyright (C) 2015 The Qt Company Ltd.
-- Contact: http://www.qt.io/licensing/
--
-- This file is part of the QtCore module of the Qt Toolkit.
--
-- $QT_BEGIN_LICENSE:LGPL21$
-- Commercial License Usage
-- Licensees holding valid commercial Qt licenses may use this file in
-- accordance with the commercial license agreement provided with the
-- Software or, alternatively, in accordance with the terms contained in
-- a written agreement between you and The Qt Company. For licensing terms
-- and conditions see http://www.qt.io/terms-conditions. For further
-- information use the contact form at http://www.qt.io/contact-us.
--
-- GNU Lesser General Public License Usage
-- Alternatively, this file may be used under the terms of the GNU Lesser
-- General Public License version 2.1 or version 3 as published by the Free
-- Software Foundation and appearing in the file LICENSE.LGPLv21 and
-- LICENSE.LGPLv3 included in the packaging of this file. Please review the
-- following information to ensure the GNU Lesser General Public License
-- requirements will be met: https://www.gnu.org/licenses/lgpl.html and
-- http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
--
-- As a special exception, The Qt Company gives you certain additional
-- rights. These rights are described in The Qt Company LGPL Exception
-- version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
--
-- $QT_END_LICENSE$
--
----------------------------------------------------------------------------
%parser calc_grammar
%decl calc_parser.h
%impl calc_parser.cpp
%token_prefix Token_
%token number
%token lparen
%token rparen
%token plus
%token minus
%start Goal
/:
#ifndef CALC_PARSER_H
#define CALC_PARSER_H
#include "qparser.h"
#include "calc_grammar_p.h"
class CalcParser: public QParser<CalcParser, $table>
{
public:
int nextToken();
void consumeRule(int ruleno);
};
#endif // CALC_PARSER_H
:/
/.
#include "calc_parser.h"
#include <QtDebug>
#include <cstdlib>
void CalcParser::consumeRule(int ruleno)
{
switch (ruleno) {
./
Goal: Expression ;
/.
case $rule_number:
qDebug() << "value:" << sym(1);
break;
./
PrimaryExpression: number ;
PrimaryExpression: lparen Expression rparen ;
/.
case $rule_number:
sym(1) = sym (2);
break;
./
Expression: PrimaryExpression ;
Expression: Expression plus PrimaryExpression;
/.
case $rule_number:
sym(1) += sym (3);
break;
./
Expression: Expression minus PrimaryExpression;
/.
case $rule_number:
sym(1) -= sym (3);
break;
./
/.
} // switch
}
#include <cstdio>
int main()
{
CalcParser p;
if (p.parse())
printf("ok\n");
}
./
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