/**************************************************************************** | |
** | |
** 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 QtXmlPatterns 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: | |
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** 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: | |
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** Other Usage | |
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// | |
// 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_Tokenizer_H | |
#define Patternist_Tokenizer_H | |
#include <QPair> | |
#include <QSharedData> | |
#include <QString> | |
#include <QUrl> | |
#include "qparsercontext_p.h" | |
#include "qtokensource_p.h" | |
/** | |
* @file | |
* @short Contains functions and classes used by the parser and tokenizer. | |
*/ | |
QT_BEGIN_HEADER | |
QT_BEGIN_NAMESPACE | |
namespace QPatternist | |
{ | |
typedef QPair<QString, Expression::Ptr> AttributeHolder; | |
typedef QVector<AttributeHolder> AttributeHolderVector; | |
class OrderSpecTransfer | |
{ | |
public: | |
typedef QList<OrderSpecTransfer> List; | |
inline OrderSpecTransfer() | |
{ | |
} | |
inline OrderSpecTransfer(const Expression::Ptr &aExpr, | |
const OrderBy::OrderSpec aOrderSpec) : expression(aExpr), | |
orderSpec(aOrderSpec) | |
{ | |
Q_ASSERT(expression); | |
} | |
Expression::Ptr expression; | |
OrderBy::OrderSpec orderSpec; | |
}; | |
/** | |
* @short The value the parser, but not the tokenizers, uses for tokens and | |
* non-terminals. | |
* | |
* It is inefficient but ensures nothing leaks, by invoking C++ | |
* destructors even in the cases the code throws exceptions. This might be | |
* able to be done in a more efficient way -- suggestions are welcome. | |
*/ | |
class TokenValue | |
{ | |
public: | |
QString sval; | |
Expression::Ptr expr; | |
Expression::List expressionList; | |
Cardinality cardinality; | |
ItemType::Ptr itemType; | |
SequenceType::Ptr sequenceType; | |
FunctionArgument::List functionArguments; | |
FunctionArgument::Ptr functionArgument; | |
QVector<QXmlName> qNameVector; | |
QXmlName qName; | |
/** | |
* Holds enum values. | |
*/ | |
EnumUnion enums; | |
AttributeHolder attributeHolder; | |
AttributeHolderVector attributeHolders; | |
OrderSpecTransfer::List orderSpecs; | |
OrderSpecTransfer orderSpec; | |
}; | |
} | |
QT_END_NAMESPACE | |
/** | |
* Macro for the data type of semantic values; int by default. | |
* See section Data Types of Semantic Values. | |
*/ | |
#define YYSTYPE QPatternist::TokenValue | |
#include "qquerytransformparser_p.h" /* This inclusion must be after TokenValue. */ | |
QT_BEGIN_NAMESPACE | |
namespace QPatternist | |
{ | |
/** | |
* @short Base class for all tokenizers. | |
* | |
* The main entry point is nextToken(), which ones calls to retrieve the stream | |
* of tokens this Tokenizer delivers. | |
* | |
* @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 Tokenizer : public TokenSource | |
{ | |
public: | |
inline Tokenizer(const QUrl &queryU) : m_queryURI(queryU) | |
{ | |
Q_ASSERT(queryU.isValid()); | |
} | |
typedef QExplicitlySharedDataPointer<Tokenizer> Ptr; | |
/** | |
* Switches the Tokenizer to only do scanning, and returns complete | |
* strings for attribute value templates as opposed to the tokens for | |
* the contained expressions. | |
* | |
* The current position in the stream is returned. It can be used to | |
* later resume regular tokenization. | |
*/ | |
virtual int commenceScanOnly() = 0; | |
/** | |
* Resumes regular parsing from @p position. The tokenizer must be in | |
* the scan-only state, which the commenceScanOnly() call transists to. | |
* | |
* The tokenizer will return the token POSITION_SET once after this | |
* function has been called. | |
*/ | |
virtual void resumeTokenizationFrom(const int position) = 0; | |
/** | |
* @returns the URI of the resource being tokenized. | |
*/ | |
inline const QUrl &queryURI() const | |
{ | |
return m_queryURI; | |
} | |
virtual void setParserContext(const ParserContext::Ptr &parseInfo) = 0; | |
protected: | |
/** | |
* Returns a string representation of @p token. | |
* | |
* This function is used for debugging purposes. The implementation of | |
* this function is in querytransformparser.ypp. | |
*/ | |
static QString tokenToString(const Token &token); | |
private: | |
Q_DISABLE_COPY(Tokenizer) | |
const QUrl m_queryURI; | |
}; | |
} | |
#undef Patternist_DEBUG_PARSER // disable it for now | |
QT_END_NAMESPACE | |
QT_END_HEADER | |
#endif |