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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 QtXmlPatterns module 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.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// 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.
#ifndef Patternist_TokenSource_H
#define Patternist_TokenSource_H
#include "qatomiccomparator_p.h"
#include "qatomicmathematician_p.h"
#include "qcombinenodes_p.h"
#include "qfunctionargument_p.h"
#include "qitem_p.h"
#include "qitemtype_p.h"
#include "qorderby_p.h"
#include "qpath_p.h"
#include "qquerytransformparser_p.h"
#include "qvalidate_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
template<typename T> class QQueue;
namespace QPatternist
{
/**
* @short A union of all the enums the parser uses.
*/
union EnumUnion
{
AtomicComparator::Operator valueOperator;
AtomicMathematician::Operator mathOperator;
CombineNodes::Operator combinedNodeOp;
QXmlNodeModelIndex::Axis axis;
QXmlNodeModelIndex::DocumentOrder nodeOperator;
StaticContext::BoundarySpacePolicy boundarySpacePolicy;
StaticContext::ConstructionMode constructionMode;
StaticContext::OrderingEmptySequence orderingEmptySequence;
StaticContext::OrderingMode orderingMode;
OrderBy::OrderSpec::Direction sortDirection;
Validate::Mode validationMode;
VariableSlotID slot;
int tokenizerPosition;
qint16 zeroer;
bool Bool;
xsDouble Double;
Path::Kind pathKind;
};
/**
* @short Base class for components that needs to return tokens.
*
* TokenSource represents a stream of Token instances. The end
* is reached when readNext() returns a Token constructed with
* END_OF_FILE.
*
* @see <a href="http://www.w3.org/TR/xquery-xpath-parsing/">Building a
* Tokenizer for XPath or XQuery</a>
* @author Frans Englich <frans.englich@nokia.com>
*/
class TokenSource : public QSharedData
{
public:
/**
* typedef for the enum Bison generates that contains
* the token symbols.
*/
typedef yytokentype TokenType;
/**
* Represents a token by carrying its name and value.
*/
class Token
{
public:
/**
* Constructs an invalid Token. This default constructor
* is need in Qt's container classes.
*/
inline Token() {}
inline Token(const TokenType t) : type(t) {}
inline Token(const TokenType t, const QString &val) : type(t), value(val) {}
bool hasError() const
{
return type == ERROR;
}
TokenType type;
QString value;
};
typedef QExplicitlySharedDataPointer<TokenSource> Ptr;
typedef QQueue<Ptr> Queue;
/**
* The C++ compiler cannot synthesize it when we use the
* Q_DISABLE_COPY() macro.
*/
inline TokenSource()
{
}
virtual ~TokenSource();
/**
* @returns the next token.
*/
virtual Token nextToken(YYLTYPE *const sourceLocator) = 0;
private:
Q_DISABLE_COPY(TokenSource)
};
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
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