| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** GNU Lesser General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU Lesser |
| ** General Public License version 3 as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.LGPL3 included in the |
| ** packaging of this file. Please review the following information to |
| ** ensure the GNU Lesser General Public License version 3 requirements |
| ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
| ** Qt Foundation. The licenses are as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 |
| ** included in the packaging of this file. Please review the following |
| ** information to ensure the GNU General Public License requirements will |
| ** be met: https://www.gnu.org/licenses/gpl-2.0.html and |
| ** https://www.gnu.org/licenses/gpl-3.0.html. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include "qarithmeticexpression_p.h" |
| #include "qcommonvalues_p.h" |
| #include "qliteral_p.h" |
| #include "qschemanumeric_p.h" |
| |
| #include "qunaryexpression_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| using namespace QPatternist; |
| |
| UnaryExpression::UnaryExpression(const AtomicMathematician::Operator op, |
| const Expression::Ptr &operand, |
| const StaticContext::Ptr &context) : ArithmeticExpression(wrapLiteral(CommonValues::IntegerZero, context, operand.data()), |
| op, |
| operand) |
| { |
| Q_ASSERT(op == AtomicMathematician::Substract || |
| op == AtomicMathematician::Add); |
| Q_ASSERT(context); |
| } |
| |
| Item UnaryExpression::evaluateSingleton(const DynamicContext::Ptr &context) const |
| { |
| if(operatorID() == AtomicMathematician::Substract) |
| { |
| const Item item(m_operand2->evaluateSingleton(context)); |
| |
| if (item) |
| // If the item is an untypedAtomic (or atomicString), the cast to Numeric will |
| // return a garbage object and will most likely cause a crash. |
| // There is simply no way to static cast from an instance of AtomicString to a Number. |
| return item.as<Numeric>()->toNegated(); |
| else |
| return Item(); |
| } |
| else |
| return m_operand2->evaluateSingleton(context); |
| } |
| |
| QT_END_NAMESPACE |