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Diffstat (limited to 'src/xmlpatterns/expr/qemptysequence.cpp')
-rw-r--r-- | src/xmlpatterns/expr/qemptysequence.cpp | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/xmlpatterns/expr/qemptysequence.cpp b/src/xmlpatterns/expr/qemptysequence.cpp new file mode 100644 index 0000000..ef8130d --- /dev/null +++ b/src/xmlpatterns/expr/qemptysequence.cpp @@ -0,0 +1,112 @@ +/**************************************************************************** +** +** 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. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qcommonvalues_p.h" +#include "qcommonsequencetypes_p.h" +#include "qemptysequencetype_p.h" + +#include "qemptysequence_p.h" + +QT_BEGIN_NAMESPACE + +using namespace QPatternist; + +Expression::Ptr EmptySequence::create(const Expression *const replacementFor, + const StaticContext::Ptr &context) +{ + Q_ASSERT(replacementFor); + Q_ASSERT(context); + + const Expression::Ptr retval(new EmptySequence()); + context->wrapExpressionWith(replacementFor, retval); + return retval; +} + +Item::Iterator::Ptr EmptySequence::evaluateSequence(const DynamicContext::Ptr &) const +{ + return CommonValues::emptyIterator; +} + +Item EmptySequence::evaluateSingleton(const DynamicContext::Ptr &) const +{ + return Item(); +} + +void EmptySequence::evaluateToSequenceReceiver(const DynamicContext::Ptr &) const +{ +} + +ItemType::Ptr EmptySequence::type() const +{ + return CommonSequenceTypes::Empty; +} + +SequenceType::Ptr EmptySequence::staticType() const +{ + return CommonSequenceTypes::Empty; +} + +bool EmptySequence::evaluateEBV(const DynamicContext::Ptr &) const +{ + return false; +} + +QString EmptySequence::stringValue() const +{ + return QString(); +} + +ExpressionVisitorResult::Ptr EmptySequence::accept(const ExpressionVisitor::Ptr &visitor) const +{ + return visitor->visit(this); +} + +Expression::ID EmptySequence::id() const +{ + return IDEmptySequence; +} + +Expression::Properties EmptySequence::properties() const +{ + return IsEvaluated; +} + +QT_END_NAMESPACE |