| 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** Contact: Qt Software Information ([email protected])
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| 5 | **
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| 6 | ** This file is part of the QtXmlPatterns module of the Qt Toolkit.
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| 7 | **
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| 8 | ** $QT_BEGIN_LICENSE:LGPL$
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| 9 | ** Commercial Usage
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| 10 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 11 | ** accordance with the Qt Commercial License Agreement provided with the
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| 12 | ** Software or, alternatively, in accordance with the terms contained in
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| 13 | ** a written agreement between you and Nokia.
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| 14 | **
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| 15 | ** GNU Lesser General Public License Usage
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| 16 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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| 17 | ** General Public License version 2.1 as published by the Free Software
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| 18 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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| 19 | ** packaging of this file. Please review the following information to
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| 20 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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| 21 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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| 22 | **
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| 23 | ** In addition, as a special exception, Nokia gives you certain
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| 24 | ** additional rights. These rights are described in the Nokia Qt LGPL
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| 25 | ** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
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| 26 | ** package.
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| 27 | **
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| 28 | ** GNU General Public License Usage
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| 29 | ** Alternatively, this file may be used under the terms of the GNU
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| 30 | ** General Public License version 3.0 as published by the Free Software
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| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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| 32 | ** packaging of this file. Please review the following information to
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| 33 | ** ensure the GNU General Public License version 3.0 requirements will be
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| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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| 35 | **
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| 36 | ** If you are unsure which license is appropriate for your use, please
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| 37 | ** contact the sales department at [email protected].
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| 38 | ** $QT_END_LICENSE$
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| 39 | **
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| 40 | ****************************************************************************/
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| 41 |
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| 42 | #include "qarithmeticexpression_p.h"
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| 43 | #include "qcommonvalues_p.h"
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| 44 | #include "qliteral_p.h"
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| 45 | #include "qschemanumeric_p.h"
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| 46 |
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| 47 | #include "qunaryexpression_p.h"
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| 48 |
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| 49 | QT_BEGIN_NAMESPACE
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| 50 |
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| 51 | using namespace QPatternist;
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| 52 |
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| 53 | UnaryExpression::UnaryExpression(const AtomicMathematician::Operator op,
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| 54 | const Expression::Ptr &operand,
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| 55 | const StaticContext::Ptr &context) : ArithmeticExpression(wrapLiteral(CommonValues::IntegerZero, context, operand.data()),
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| 56 | op,
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| 57 | operand)
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| 58 | {
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| 59 | Q_ASSERT(op == AtomicMathematician::Substract ||
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| 60 | op == AtomicMathematician::Add);
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| 61 | Q_ASSERT(context);
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| 62 | }
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| 63 |
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| 64 | Item UnaryExpression::evaluateSingleton(const DynamicContext::Ptr &context) const
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| 65 | {
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| 66 | if(operatorID() == AtomicMathematician::Substract)
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| 67 | {
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| 68 | const Item item(m_operand2->evaluateSingleton(context));
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| 69 |
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| 70 | if(item)
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| 71 | return item.as<Numeric>()->toNegated();
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| 72 | else
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| 73 | return Item();
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| 74 | }
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| 75 | else
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| 76 | return m_operand2->evaluateSingleton(context);
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| 77 | }
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| 78 |
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| 79 | QT_END_NAMESPACE
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