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----------------------------------------------------------------------------
--
-- Copyright (C) 2016 The Qt Company Ltd.
-- Contact: https://www.qt.io/licensing/
--
-- This file is part of the QtCore module of the Qt Toolkit.
--
-- $QT_BEGIN_LICENSE:GPL-EXCEPT$
-- 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 https://www.qt.io/terms-conditions. For further
-- information use the contact form at https://www.qt.io/contact-us.
--
-- GNU General Public License Usage
-- Alternatively, this file may be used under the terms of the GNU
-- General Public License version 3 as published by the Free Software
-- Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
-- included in the packaging of this file. Please review the following
-- information to ensure the GNU General Public License requirements will
-- be met: https://www.gnu.org/licenses/gpl-3.0.html.
--
-- $QT_END_LICENSE$
--
----------------------------------------------------------------------------
%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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