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// | |
// W A R N I N G | |
// ------------- | |
// | |
// This file is not part of the Qt API. It exists purely as an | |
// implementation detail. This header file may change from version to | |
// version without notice, or even be removed. | |
// | |
// We mean it. | |
#ifndef Patternist_ArithmeticExpression_H | |
#define Patternist_ArithmeticExpression_H | |
#include "qatomicmathematician_p.h" | |
#include "qpaircontainer_p.h" | |
QT_BEGIN_HEADER | |
QT_BEGIN_NAMESPACE | |
namespace QPatternist | |
{ | |
/** | |
* @short Implements arithmetics, such as multiplication and subtraction. | |
* | |
* | |
* Optimizations: there's some operator/value combos that are no ops. For | |
* instance, 0 + <value>, which is the case of unary plus. We can't compile | |
* those away early due to that type checks needs to be done but one can | |
* check for them in compress(). | |
* | |
* @see <a href="http://www.w3.org/TR/xpath20/#id-arithmetic">XML Path Language | |
* (XPath) 2.0, 3.4 Arithmetic Expressions</a> | |
* @author Frans Englich <frans.englich@nokia.com> | |
* @ingroup Patternist_expressions | |
*/ | |
class Q_AUTOTEST_EXPORT ArithmeticExpression : public PairContainer | |
{ | |
public: | |
ArithmeticExpression(const Expression::Ptr &operand1, | |
const AtomicMathematician::Operator op, | |
const Expression::Ptr &operand2); | |
virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; | |
virtual SequenceType::Ptr staticType() const; | |
virtual SequenceType::List expectedOperandTypes() const; | |
AtomicMathematician::Operator operatorID() const; | |
virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, | |
const SequenceType::Ptr &reqType); | |
static Item flexiblyCalculate(const Item &op1, | |
const AtomicMathematician::Operator op, | |
const Item &op2, | |
const AtomicMathematician::Ptr &mather, | |
const DynamicContext::Ptr &context, | |
const SourceLocationReflection *const reflection, | |
const ReportContext::ErrorCode code = ReportContext::XPTY0004, | |
const bool isCompat = false); | |
static AtomicMathematician::Ptr | |
fetchMathematician(Expression::Ptr &t1, | |
Expression::Ptr &t2, | |
const AtomicMathematician::Operator op, | |
const bool issueError, | |
const ReportContext::Ptr &context, | |
const SourceLocationReflection *const reflection, | |
const ReportContext::ErrorCode code = ReportContext::XPTY0004, | |
const bool isCompat = false); | |
virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const; | |
protected: | |
private: | |
const AtomicMathematician::Operator m_op; | |
AtomicMathematician::Ptr m_mather; | |
bool m_isCompat; | |
}; | |
inline AtomicMathematician::Operator ArithmeticExpression::operatorID() const | |
{ | |
return m_op; | |
} | |
} | |
QT_END_NAMESPACE | |
QT_END_HEADER | |
#endif |