/****************************************************************************+
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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 tools applications 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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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#ifndef PARSER_H+
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#define PARSER_H+
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+
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#include <QStack>+
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#include "symbols.h"+
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+
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QT_BEGIN_NAMESPACE+
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+
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class Parser+
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{+
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public:+
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    Parser():index(0), displayWarnings(true){}+
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    Symbols symbols;+
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    int index;+
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    bool displayWarnings;+
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+
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    QStack<QByteArray> currentFilenames;+
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+
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    inline bool hasNext() const { return (index < symbols.size()); }+
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    inline Token next() { if (index >= symbols.size()) return NOTOKEN; return symbols.at(index++).token; }+
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    bool test(Token);+
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    void next(Token);+
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    void next(Token, const char *msg);+
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    inline void prev() {--index;}+
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    inline Token lookup(int k = 1);+
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    inline const Symbol &symbol_lookup(int k = 1) { return symbols.at(index-1+k);}+
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    inline Token token() { return symbols.at(index-1).token;}+
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    inline QByteArray lexem() { return symbols.at(index-1).lexem();}+
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    inline QByteArray unquotedLexem() { return symbols.at(index-1).unquotedLexem();}+
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    inline const Symbol &symbol() { return symbols.at(index-1);}+
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+
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    void error(int rollback);+
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    void error(const char *msg = 0);+
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    void warning(const char * = 0);+
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+
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};+
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+
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inline bool Parser::test(Token token)+
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{+
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    if (index < symbols.size() && symbols.at(index).token == token) {+
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        ++index;+
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        return true;+
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    }+
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    return false;+
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}+
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+
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inline Token Parser::lookup(int k)+
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{+
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    const int l = index - 1 + k;+
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    return l < symbols.size() ? symbols.at(l).token : NOTOKEN;+
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}+
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+
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inline void Parser::next(Token token)+
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{+
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    if (!test(token))+
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        error();+
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}+
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+
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inline void Parser::next(Token token, const char *msg)+
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{+
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    if (!test(token))+
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        error(msg);+
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}+
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+
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QT_END_NAMESPACE+
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+
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#endif+
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