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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_GeneralComparison_H |
| #define Patternist_GeneralComparison_H |
| |
| #include <private/qatomiccomparator_p.h> |
| #include <private/qpaircontainer_p.h> |
| #include <private/qcomparisonplatform_p.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace QPatternist |
| { |
| |
| /** |
| * @short Implements XPath 2.0's general comparions, such as the <tt>=</tt> operator. |
| * |
| * ComparisonPlatform is inherited with @c protected scope because ComparisonPlatform |
| * must access members of GeneralComparison. |
| * |
| * @see <a href="http://www.w3.org/TR/xpath20/#id-general-comparisons">XML Path Language |
| * (XPath) 2.0, 3.5.2 General Comparisons</a> |
| * @author Frans Englich <frans.englich@nokia.com> |
| * @ingroup Patternist_expressions |
| */ |
| class Q_AUTOTEST_EXPORT GeneralComparison |
| : public PairContainer, public ComparisonPlatform<GeneralComparison, |
| true /* We want to report errors. */, |
| AtomicComparator::AsGeneralComparison> |
| { |
| public: |
| GeneralComparison(const Expression::Ptr &op1, |
| const AtomicComparator::Operator op, |
| const Expression::Ptr &op2, |
| const bool isBackwardsCompat = false); |
| ~GeneralComparison(); |
| |
| virtual bool evaluateEBV(const DynamicContext::Ptr &) const; |
| virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, |
| const SequenceType::Ptr &reqType); |
| |
| virtual SequenceType::List expectedOperandTypes() const; |
| virtual SequenceType::Ptr staticType() const; |
| |
| virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const; |
| |
| /** |
| * @returns always IDGeneralComparison |
| */ |
| virtual ID id() const; |
| |
| virtual QList<QExplicitlySharedDataPointer<OptimizationPass> > optimizationPasses() const; |
| |
| /** |
| * @returns the operator that this GeneralComparison is using. |
| */ |
| inline AtomicComparator::Operator operatorID() const |
| { |
| return m_operator; |
| } |
| |
| /** |
| * Overridden to optimize case-insensitive compares. |
| */ |
| virtual Expression::Ptr compress(const StaticContext::Ptr &context); |
| |
| private: |
| static inline void updateType(ItemType::Ptr &type, |
| const Expression::Ptr &source); |
| AtomicComparator::Ptr fetchGeneralComparator(Expression::Ptr &op1, |
| Expression::Ptr &op2, |
| const ReportContext::Ptr &context) const; |
| bool generalCompare(const Item &op1, |
| const Item &op2, |
| const DynamicContext::Ptr &context) const; |
| |
| const AtomicComparator::Operator m_operator; |
| const bool m_isBackwardsCompat; |
| }; |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif |