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Diffstat (limited to 'src/xmlpatterns/expr/qrangeexpression_p.h')
| -rw-r--r-- | src/xmlpatterns/expr/qrangeexpression_p.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/xmlpatterns/expr/qrangeexpression_p.h b/src/xmlpatterns/expr/qrangeexpression_p.h new file mode 100644 index 0000000..7a87514 --- /dev/null +++ b/src/xmlpatterns/expr/qrangeexpression_p.h @@ -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. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +// +// 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_RangeExpression_H +#define Patternist_RangeExpression_H + +#include "qpaircontainer_p.h" + +QT_BEGIN_HEADER + +QT_BEGIN_NAMESPACE + +namespace QPatternist +{ + + /** + * @short Implements XPath 2.0's @c to expression. + * + * Despite its name, RangeExpression is not related to RangeVariableDeclaration. + * + * @see <a href="http://www.w3.org/TR/xpath20/#construct_seq">XML Path Language + * (XPath) 2.0, 3.3.1 Constructing Sequences</a> + * @see RangeIterator + * @author Frans Englich <fenglich@trolltech.com> + * @ingroup Patternist_expressions + */ + class RangeExpression : public PairContainer + { + public: + RangeExpression(const Expression::Ptr &operand1, const Expression::Ptr &operand2); + + virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &) const; + /** + * It's likely that this function gets called if staticType() inferred + * the cardinality to an exact number. In that case, we know that the + * first arguments is the same as the second argument. + */ + virtual Item evaluateSingleton(const DynamicContext::Ptr &) const; + + virtual SequenceType::List expectedOperandTypes() const; + + /** + * @returns always CommonSequenceTypes::ZeroOrMoreIntegers + */ + virtual SequenceType::Ptr staticType() const; + + /** + * Disables compression for optimization reasons. For example, the + * expression "1 to 1000" would consume thousand allocated instances + * of Integer, and RangeIterator is well suited for dynamic evaluation. + * + * @returns Expression::DisableElimination + */ + virtual Expression::Properties properties() const; + + virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const; + }; +} + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif |