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46 // This file is not part of the Qt API. It exists purely as an
47 // implementation detail. This header file may change from version to
48 // version without notice, or even be removed.
52 #ifndef Patternist_ArithmeticExpression_H
53 #define Patternist_ArithmeticExpression_H
55 #include <private/qatomicmathematician_p.h>
56 #include <private/qpaircontainer_p.h>
65 * @short Implements arithmetics, such as multiplication and subtraction.
68 * Optimizations: there's some operator/value combos that are no ops. For
69 * instance, 0 + <value>, which is the case of unary plus. We can't compile
70 * those away early due to that type checks needs to be done but one can
71 * check for them in compress().
73 * @see <a href="http://www.w3.org/TR/xpath20/#id-arithmetic">XML Path Language
74 * (XPath) 2.0, 3.4 Arithmetic Expressions</a>
75 * @author Frans Englich <frans.englich@nokia.com>
76 * @ingroup Patternist_expressions
78 class Q_AUTOTEST_EXPORT ArithmeticExpression : public PairContainer
81 ArithmeticExpression(const Expression::Ptr &operand1,
82 const AtomicMathematician::Operator op,
83 const Expression::Ptr &operand2);
85 virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
87 virtual SequenceType::Ptr staticType() const;
88 virtual SequenceType::List expectedOperandTypes() const;
89 AtomicMathematician::Operator operatorID() const;
91 virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context,
92 const SequenceType::Ptr &reqType);
94 static Item flexiblyCalculate(const Item &op1,
95 const AtomicMathematician::Operator op,
97 const AtomicMathematician::Ptr &mather,
98 const DynamicContext::Ptr &context,
99 const SourceLocationReflection *const reflection,
100 const ReportContext::ErrorCode code = ReportContext::XPTY0004,
101 const bool isCompat = false);
103 static AtomicMathematician::Ptr
104 fetchMathematician(Expression::Ptr &t1,
106 const AtomicMathematician::Operator op,
107 const bool issueError,
108 const ReportContext::Ptr &context,
109 const SourceLocationReflection *const reflection,
110 const ReportContext::ErrorCode code = ReportContext::XPTY0004,
111 const bool isCompat = false);
112 virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
117 const AtomicMathematician::Operator m_op;
118 AtomicMathematician::Ptr m_mather;
122 inline AtomicMathematician::Operator ArithmeticExpression::operatorID() const