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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_IfThenClause_H |
51 | #define Patternist_IfThenClause_H |
52 | |
53 | #include <private/qtriplecontainer_p.h> |
54 | |
55 | QT_BEGIN_NAMESPACE |
56 | |
57 | namespace QPatternist |
58 | { |
59 | /** |
60 | * @short Implements XPath 2.0's conditional expression <tt>if([expr]) then [expr] else [expr]</tt>. |
61 | * |
62 | * @see <a href="http://www.w3.org/TR/xpath20/#id-conditionals">XML Path Language (XPath) 2.0, |
63 | * 3.8 Conditional Expressions</a> |
64 | * @author Frans Englich <frans.englich@nokia.com> |
65 | * @ingroup Patternist_expressions |
66 | */ |
67 | class IfThenClause : public TripleContainer |
68 | { |
69 | public: |
70 | IfThenClause(const Expression::Ptr &test, |
71 | const Expression::Ptr &then, |
72 | const Expression::Ptr &el); |
73 | |
74 | virtual bool evaluateEBV(const DynamicContext::Ptr &context) const; |
75 | virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &context) const; |
76 | virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
77 | virtual void evaluateToSequenceReceiver(const DynamicContext::Ptr &context) const; |
78 | |
79 | virtual SequenceType::List expectedOperandTypes() const; |
80 | virtual Expression::Ptr compress(const StaticContext::Ptr &context); |
81 | |
82 | virtual SequenceType::Ptr staticType() const; |
83 | virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const; |
84 | /** |
85 | * @returns IDIfThenClause |
86 | */ |
87 | virtual ID id() const; |
88 | virtual QList<QExplicitlySharedDataPointer<OptimizationPass> > optimizationPasses() const; |
89 | //virtual Properties properties() const; |
90 | }; |
91 | } |
92 | |
93 | QT_END_NAMESPACE |
94 | |
95 | #endif |
96 | |