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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_EBVExtractor_H |
51 | #define |
52 | |
53 | #include <private/qsinglecontainer_p.h> |
54 | |
55 | QT_BEGIN_NAMESPACE |
56 | |
57 | namespace QPatternist |
58 | { |
59 | /** |
60 | * @short Calculates the Effective Boolean Value of its operand. |
61 | * |
62 | * EBVExtractor performs functionality wise the same as @c fn:boolean(), |
63 | * but does it without the dependencies which FunctionCall requires. |
64 | * |
65 | * There is code-duplication going on with BooleanFN. |
66 | * |
67 | * @see BooleanFN |
68 | * @author Frans Englich <frans.englich@nokia.com> |
69 | * @ingroup Patternist_expressions |
70 | */ |
71 | class : public SingleContainer |
72 | { |
73 | public: |
74 | (const Expression::Ptr &operand); |
75 | virtual bool (const DynamicContext::Ptr &context) const; |
76 | virtual SequenceType::List expectedOperandTypes() const; |
77 | virtual const SourceLocationReflection *() const; |
78 | virtual Expression::Ptr (const StaticContext::Ptr &context, |
79 | const SequenceType::Ptr &reqType); |
80 | virtual ExpressionVisitorResult::Ptr (const ExpressionVisitor::Ptr &visitor) const; |
81 | |
82 | /** |
83 | * @short Returns always @c xs:boolean. |
84 | */ |
85 | virtual SequenceType::Ptr () const; |
86 | |
87 | template<typename TSubClass, typename ThisType> |
88 | static Expression::Ptr (const StaticContext::Ptr &context, |
89 | const SequenceType::Ptr &reqType, |
90 | ThisType *const caller) |
91 | { |
92 | if(*CommonSequenceTypes::EBV->itemType() == *reqType->itemType()) |
93 | return caller->operands().first()->typeCheck(context, reqType); |
94 | else |
95 | return caller->TSubClass::typeCheck(context, reqType); |
96 | } |
97 | |
98 | }; |
99 | } |
100 | |
101 | QT_END_NAMESPACE |
102 | |
103 | #endif |
104 | |