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Diffstat (limited to 'src/xmlpatterns/parser/qtokenizer_p.h')
| -rw-r--r-- | src/xmlpatterns/parser/qtokenizer_p.h | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/src/xmlpatterns/parser/qtokenizer_p.h b/src/xmlpatterns/parser/qtokenizer_p.h new file mode 100644 index 0000000000..eecd5b299f --- /dev/null +++ b/src/xmlpatterns/parser/qtokenizer_p.h @@ -0,0 +1,216 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, 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. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@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_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 <fenglich@trolltech.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 |