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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 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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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 // |
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43 // W A R N I N G |
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44 // ------------- |
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45 // |
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46 // This file is not part of the Qt API. It exists purely as an |
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47 // implementation detail. This header file may change from version to |
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48 // version without notice, or even be removed. |
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49 // |
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50 // We mean it. |
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51 |
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52 #ifndef Patternist_ArithmeticExpression_H |
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53 #define Patternist_ArithmeticExpression_H |
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54 |
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55 #include "qatomicmathematician_p.h" |
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56 #include "qpaircontainer_p.h" |
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57 |
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58 QT_BEGIN_HEADER |
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59 |
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60 QT_BEGIN_NAMESPACE |
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61 |
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62 namespace QPatternist |
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63 { |
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64 /** |
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65 * @short Implements arithmetics, such as multiplication and substraction. |
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66 * |
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67 * |
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68 * Optimizations: there's some operator/value combos that are no ops. For |
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69 * instance, 0 + <value>, which is the case of unary plus. We can't compile |
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70 * those away early due to that type checks needs to be done but one can |
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71 * check for them in compress(). |
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72 * |
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73 * @see <a href="http://www.w3.org/TR/xpath20/#id-arithmetic">XML Path Language |
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74 * (XPath) 2.0, 3.4 Arithmetic Expressions</a> |
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75 * @author Frans Englich <frans.englich@nokia.com> |
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76 * @ingroup Patternist_expressions |
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77 */ |
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78 class Q_AUTOTEST_EXPORT ArithmeticExpression : public PairContainer |
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79 { |
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80 public: |
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81 ArithmeticExpression(const Expression::Ptr &operand1, |
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82 const AtomicMathematician::Operator op, |
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83 const Expression::Ptr &operand2); |
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84 |
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85 virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
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86 |
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87 virtual SequenceType::Ptr staticType() const; |
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88 virtual SequenceType::List expectedOperandTypes() const; |
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89 AtomicMathematician::Operator operatorID() const; |
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90 |
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91 virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, |
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92 const SequenceType::Ptr &reqType); |
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93 |
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94 static Item flexiblyCalculate(const Item &op1, |
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95 const AtomicMathematician::Operator op, |
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96 const Item &op2, |
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97 const AtomicMathematician::Ptr &mather, |
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98 const DynamicContext::Ptr &context, |
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99 const SourceLocationReflection *const reflection, |
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100 const ReportContext::ErrorCode code = ReportContext::XPTY0004, |
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101 const bool isCompat = false); |
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102 |
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103 static AtomicMathematician::Ptr |
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104 fetchMathematician(Expression::Ptr &t1, |
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105 Expression::Ptr &t2, |
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106 const AtomicMathematician::Operator op, |
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107 const bool issueError, |
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108 const ReportContext::Ptr &context, |
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109 const SourceLocationReflection *const reflection, |
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110 const ReportContext::ErrorCode code = ReportContext::XPTY0004, |
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111 const bool isCompat = false); |
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112 virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const; |
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113 |
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114 protected: |
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115 |
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116 private: |
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117 const AtomicMathematician::Operator m_op; |
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118 AtomicMathematician::Ptr m_mather; |
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119 bool m_isCompat; |
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120 }; |
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121 |
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122 inline AtomicMathematician::Operator ArithmeticExpression::operatorID() const |
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123 { |
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124 return m_op; |
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125 } |
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126 |
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127 } |
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128 |
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129 QT_END_NAMESPACE |
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130 |
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131 QT_END_HEADER |
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132 |
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133 #endif |