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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_EBVExtractor_H |
| #define Patternist_EBVExtractor_H |
| |
| #include <private/qsinglecontainer_p.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace QPatternist |
| { |
| /** |
| * @short Calculates the Effective Boolean Value of its operand. |
| * |
| * EBVExtractor performs functionality wise the same as @c fn:boolean(), |
| * but does it without the dependencies which FunctionCall requires. |
| * |
| * There is code-duplication going on with BooleanFN. |
| * |
| * @see BooleanFN |
| * @author Frans Englich <frans.englich@nokia.com> |
| * @ingroup Patternist_expressions |
| */ |
| class EBVExtractor : public SingleContainer |
| { |
| public: |
| EBVExtractor(const Expression::Ptr &operand); |
| virtual bool evaluateEBV(const DynamicContext::Ptr &context) const; |
| virtual SequenceType::List expectedOperandTypes() const; |
| virtual const SourceLocationReflection *actualReflection() const; |
| virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, |
| const SequenceType::Ptr &reqType); |
| virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const; |
| |
| /** |
| * @short Returns always @c xs:boolean. |
| */ |
| virtual SequenceType::Ptr staticType() const; |
| |
| template<typename TSubClass, typename ThisType> |
| static Expression::Ptr typeCheck(const StaticContext::Ptr &context, |
| const SequenceType::Ptr &reqType, |
| ThisType *const caller) |
| { |
| if(*CommonSequenceTypes::EBV->itemType() == *reqType->itemType()) |
| return caller->operands().first()->typeCheck(context, reqType); |
| else |
| return caller->TSubClass::typeCheck(context, reqType); |
| } |
| |
| }; |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif |