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39
40//
41// W A R N I N G
42// -------------
43//
44// This file is not part of the Qt API. It exists purely as an
45// implementation detail. This header file may change from version to
46// version without notice, or even be removed.
47//
48// We mean it.
49
50#ifndef Patternist_ArithmeticExpression_H
51#define Patternist_ArithmeticExpression_H
52
53#include <private/qatomicmathematician_p.h>
54#include <private/qpaircontainer_p.h>
55
56QT_BEGIN_NAMESPACE
57
58namespace QPatternist
59{
60 /**
61 * @short Implements arithmetics, such as multiplication and subtraction.
62 *
63 *
64 * Optimizations: there's some operator/value combos that are no ops. For
65 * instance, 0 + <value>, which is the case of unary plus. We can't compile
66 * those away early due to that type checks needs to be done but one can
67 * check for them in compress().
68 *
69 * @see <a href="http://www.w3.org/TR/xpath20/#id-arithmetic">XML Path Language
70 * (XPath) 2.0, 3.4 Arithmetic Expressions</a>
71 * @author Frans Englich <frans.englich@nokia.com>
72 * @ingroup Patternist_expressions
73 */
74 class Q_AUTOTEST_EXPORT ArithmeticExpression : public PairContainer
75 {
76 public:
77 ArithmeticExpression(const Expression::Ptr &operand1,
78 const AtomicMathematician::Operator op,
79 const Expression::Ptr &operand2);
80
81 virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
82
83 virtual SequenceType::Ptr staticType() const;
84 virtual SequenceType::List expectedOperandTypes() const;
85 AtomicMathematician::Operator operatorID() const;
86
87 virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context,
88 const SequenceType::Ptr &reqType);
89
90 static Item flexiblyCalculate(const Item &op1,
91 const AtomicMathematician::Operator op,
92 const Item &op2,
93 const AtomicMathematician::Ptr &mather,
94 const DynamicContext::Ptr &context,
95 const SourceLocationReflection *const reflection,
96 const ReportContext::ErrorCode code = ReportContext::XPTY0004,
97 const bool isCompat = false);
98
99 static AtomicMathematician::Ptr
100 fetchMathematician(Expression::Ptr &t1,
101 Expression::Ptr &t2,
102 const AtomicMathematician::Operator op,
103 const bool issueError,
104 const ReportContext::Ptr &context,
105 const SourceLocationReflection *const reflection,
106 const ReportContext::ErrorCode code = ReportContext::XPTY0004,
107 const bool isCompat = false);
108 virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
109
110 protected:
111
112 private:
113 const AtomicMathematician::Operator m_op;
114 AtomicMathematician::Ptr m_mather;
115 bool m_isCompat;
116 };
117
118 inline AtomicMathematician::Operator ArithmeticExpression::operatorID() const
119 {
120 return m_op;
121 }
122
123}
124
125QT_END_NAMESPACE
126
127#endif
128

source code of qtxmlpatterns/src/xmlpatterns/expr/qarithmeticexpression_p.h