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Diffstat (limited to 'src/xmlpatterns/expr/qcastableas_p.h')
| -rw-r--r-- | src/xmlpatterns/expr/qcastableas_p.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/xmlpatterns/expr/qcastableas_p.h b/src/xmlpatterns/expr/qcastableas_p.h new file mode 100644 index 0000000..b1b2ecf --- /dev/null +++ b/src/xmlpatterns/expr/qcastableas_p.h @@ -0,0 +1,111 @@ +/**************************************************************************** +** +** 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_CastableAs_H +#define Patternist_CastableAs_H + +#include "qsinglecontainer_p.h" +#include "qcastingplatform_p.h" + +QT_BEGIN_HEADER + +QT_BEGIN_NAMESPACE + +namespace QPatternist +{ + + /** + * @short Implements XPath 2.0's <tt>castable as</tt> expression. + * + * @see <a href="http://www.w3.org/TR/xpath20/#id-castable">XML Path Language + * (XPath) 2.0, 3.10.3 Castable</a> + * @author Frans Englich <fenglich@trolltech.com> + * @ingroup Patternist_expressions + */ + class CastableAs : public SingleContainer, + public CastingPlatform<CastableAs, false> + { + public: + CastableAs(const Expression::Ptr &operand, + const SequenceType::Ptr &targetType); + + virtual bool evaluateEBV(const DynamicContext::Ptr &) const; + + /** + * Overridden to const fold to @c true when the target type + * is a type which casting to always succeeds. This is + * the type identical to the target type, <tt>xs:string</tt>, + * and <tt>xs:untypedAtomic</tt>. + */ + virtual Expression::Ptr compress(const StaticContext::Ptr &context); + virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, + const SequenceType::Ptr &reqType); + + virtual SequenceType::List expectedOperandTypes() const; + virtual SequenceType::Ptr staticType() const; + + virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const; + + inline ItemType::Ptr targetType() const + { + return m_targetType->itemType(); + } + + private: + const SequenceType::Ptr m_targetType; + }; +} + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif |