/**************************************************************************** | |
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
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** This file is part of the tools applications of the Qt Toolkit. | |
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** GNU Lesser General Public License Usage | |
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** GNU General Public License Usage | |
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****************************************************************************/ | |
#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 |