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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QDECLARATIVEJSLEXER_P_H
#define QDECLARATIVEJSLEXER_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "qdeclarativejsglobal_p.h"
#include "qdeclarativejsgrammar_p.h"
#include <QtCore/QString>
QT_QML_BEGIN_NAMESPACE
namespace QDeclarativeJS {
class Engine;
class QML_PARSER_EXPORT Lexer: public QDeclarativeJSGrammar
{
public:
enum {
T_ABSTRACT = T_RESERVED_WORD,
T_BOOLEAN = T_RESERVED_WORD,
T_BYTE = T_RESERVED_WORD,
T_CHAR = T_RESERVED_WORD,
T_CLASS = T_RESERVED_WORD,
T_DOUBLE = T_RESERVED_WORD,
T_ENUM = T_RESERVED_WORD,
T_EXPORT = T_RESERVED_WORD,
T_EXTENDS = T_RESERVED_WORD,
T_FINAL = T_RESERVED_WORD,
T_FLOAT = T_RESERVED_WORD,
T_GOTO = T_RESERVED_WORD,
T_IMPLEMENTS = T_RESERVED_WORD,
T_INT = T_RESERVED_WORD,
T_INTERFACE = T_RESERVED_WORD,
T_LET = T_RESERVED_WORD,
T_LONG = T_RESERVED_WORD,
T_NATIVE = T_RESERVED_WORD,
T_PACKAGE = T_RESERVED_WORD,
T_PRIVATE = T_RESERVED_WORD,
T_PROTECTED = T_RESERVED_WORD,
T_SHORT = T_RESERVED_WORD,
T_STATIC = T_RESERVED_WORD,
T_SUPER = T_RESERVED_WORD,
T_SYNCHRONIZED = T_RESERVED_WORD,
T_THROWS = T_RESERVED_WORD,
T_TRANSIENT = T_RESERVED_WORD,
T_VOLATILE = T_RESERVED_WORD,
T_YIELD = T_RESERVED_WORD
};
enum Error {
NoError,
IllegalCharacter,
UnclosedStringLiteral,
IllegalEscapeSequence,
IllegalUnicodeEscapeSequence,
UnclosedComment,
IllegalExponentIndicator,
IllegalIdentifier
};
enum RegExpBodyPrefix {
NoPrefix,
EqualPrefix
};
public:
Lexer(Engine *engine);
QString code() const;
void setCode(const QString &code, int lineno, bool qmlMode = true);
int lex();
bool scanRegExp(RegExpBodyPrefix prefix = NoPrefix);
int regExpFlags() const { return _patternFlags; }
QString regExpPattern() const { return _tokenText; }
int tokenOffset() const;
int tokenLength() const;
int tokenStartLine() const;
int tokenStartColumn() const;
int tokenEndLine() const;
int tokenEndColumn() const;
QStringRef tokenSpell() const;
double tokenValue() const;
QString tokenText() const;
Error errorCode() const;
QString errorMessage() const;
bool prevTerminator() const;
enum ParenthesesState {
IgnoreParentheses,
CountParentheses,
BalancedParentheses
};
private:
inline void scanChar();
int scanToken();
int classify(const QChar *s, int n, bool qmlMode);
bool isLineTerminator() const;
static bool isIdentLetter(QChar c);
static bool isDecimalDigit(ushort c);
static bool isHexDigit(QChar c);
static bool isOctalDigit(ushort c);
static bool isUnicodeEscapeSequence(const QChar *chars);
void syncProhibitAutomaticSemicolon();
QChar decodeUnicodeEscapeCharacter(bool *ok);
private:
Engine *_engine;
QString _code;
QString _tokenText;
QString _errorMessage;
QStringRef _tokenSpell;
const QChar *_codePtr;
const QChar *_lastLinePtr;
const QChar *_tokenLinePtr;
const QChar *_tokenStartPtr;
QChar _char;
Error _errorCode;
int _currentLineNumber;
double _tokenValue;
// parentheses state
ParenthesesState _parenthesesState;
int _parenthesesCount;
int _stackToken;
int _patternFlags;
int _tokenKind;
int _tokenLength;
int _tokenLine;
bool _validTokenText;
bool _prohibitAutomaticSemicolon;
bool _restrictedKeyword;
bool _terminator;
bool _delimited;
bool _qmlMode;
};
} // end of namespace QDeclarativeJS
QT_QML_END_NAMESPACE
#endif // LEXER_H
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