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133 lines
3 KiB
Text
133 lines
3 KiB
Text
----------------------------------------------------------------------------
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--
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-- Copyright (C) 2015 The Qt Company Ltd.
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-- Contact: http://www.qt.io/licensing/
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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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-- Commercial License Usage
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-- Licensees holding valid commercial Qt licenses may use this file in
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-- accordance with the commercial license agreement provided with the
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-- Software or, alternatively, in accordance with the terms contained in
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-- a written agreement between you and The Qt Company. For licensing terms
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-- and conditions see http://www.qt.io/terms-conditions. For further
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-- information use the contact form at http://www.qt.io/contact-us.
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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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-- As a special exception, The Qt Company gives you certain additional
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-- rights. These rights are described in The Qt Company 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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-- GNU General Public License Usage
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-- Alternatively, this file may be used under the terms of the GNU
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-- General Public License version 3.0 as published by the Free Software
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-- Foundation and appearing in the file LICENSE.GPL included in the
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-- packaging of this file. Please review the following information to
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-- ensure the GNU General Public License version 3.0 requirements will be
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-- met: http://www.gnu.org/copyleft/gpl.html.
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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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%parser calc_grammar
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%decl calc_parser.h
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%impl calc_parser.cpp
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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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%start Goal
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/:
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#ifndef CALC_PARSER_H
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#define CALC_PARSER_H
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#include "qparser.h"
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#include "calc_grammar_p.h"
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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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#endif // CALC_PARSER_H
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:/
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/.
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#include "calc_parser.h"
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#include <QtDebug>
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#include <cstdlib>
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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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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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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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Expression: PrimaryExpression ;
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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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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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} // switch
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}
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#include <cstdio>
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int main()
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{
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CalcParser p;
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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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