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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the tools applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef PARSER_H
#define PARSER_H
#include <QStack>
#include "symbols.h"
QT_BEGIN_NAMESPACE
class Parser
{
public:
Parser():index(0), displayWarnings(true){}
Symbols symbols;
int index;
bool displayWarnings;
QStack<QByteArray> currentFilenames;
inline bool hasNext() const { return (index < symbols.size()); }
inline Token next() { if (index >= symbols.size()) return NOTOKEN; return symbols.at(index++).token; }
bool test(Token);
void next(Token);
void next(Token, const char *msg);
inline void prev() {--index;}
inline Token lookup(int k = 1);
inline const Symbol &symbol_lookup(int k = 1) { return symbols.at(index-1+k);}
inline Token token() { return symbols.at(index-1).token;}
inline QByteArray lexem() { return symbols.at(index-1).lexem();}
inline QByteArray unquotedLexem() { return symbols.at(index-1).unquotedLexem();}
inline const Symbol &symbol() { return symbols.at(index-1);}
void error(int rollback);
void error(const char *msg = 0);
void warning(const char * = 0);
};
inline bool Parser::test(Token token)
{
if (index < symbols.size() && symbols.at(index).token == token) {
++index;
return true;
}
return false;
}
inline Token Parser::lookup(int k)
{
const int l = index - 1 + k;
return l < symbols.size() ? symbols.at(l).token : NOTOKEN;
}
inline void Parser::next(Token token)
{
if (!test(token))
error();
}
inline void Parser::next(Token token, const char *msg)
{
if (!test(token))
error(msg);
}
QT_END_NAMESPACE
#endif
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