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6 | ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
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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_InstanceOf_H |
51 | #define Patternist_InstanceOf_H |
52 | |
53 | #include <private/qsinglecontainer_p.h> |
54 | |
55 | QT_BEGIN_NAMESPACE |
56 | |
57 | namespace QPatternist |
58 | { |
59 | |
60 | /** |
61 | * @short Implements XPath 2.0's <tt>instance of</tt> expression. |
62 | * |
63 | * @see <a href="http://www.w3.org/TR/xpath20/#id-instance-of">XML Path Language (XPath) 2.0, |
64 | * 3.10.1 Instance Of</a> |
65 | * @author Frans Englich <frans.englich@nokia.com> |
66 | * @ingroup Patternist_expressions |
67 | */ |
68 | class Q_AUTOTEST_EXPORT InstanceOf : public SingleContainer |
69 | { |
70 | public: |
71 | |
72 | InstanceOf(const Expression::Ptr &operand, |
73 | const SequenceType::Ptr &targetType); |
74 | |
75 | virtual bool evaluateEBV(const DynamicContext::Ptr &) const; |
76 | |
77 | virtual SequenceType::List expectedOperandTypes() const; |
78 | virtual SequenceType::Ptr staticType() const; |
79 | virtual Expression::Ptr compress(const StaticContext::Ptr &context); |
80 | virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const; |
81 | |
82 | /** |
83 | * @returns the SequenceType that this <tt>instance of</tt> Expression |
84 | * is testing its operand against. |
85 | */ |
86 | SequenceType::Ptr targetType() const; |
87 | |
88 | private: |
89 | const SequenceType::Ptr m_targetType; |
90 | }; |
91 | } |
92 | |
93 | QT_END_NAMESPACE |
94 | |
95 | #endif |
96 | |