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46 // This file is not part of the Qt API. It exists purely as an
47 // implementation detail. This header file may change from version to
48 // version without notice, or even be removed.
52 #ifndef Patternist_ArgumentConverter_H
53 #define Patternist_ArgumentConverter_H
55 #include <private/quntypedatomicconverter_p.h>
65 * @short UntypedAtomicConverter for ArgumentReference, if needed.
67 * If an argument inside a user function has no type declared, its type
68 * is @c item(). It's atomized type would be inferred to @c
69 * xs:anyAtomicType, but that is not necessarily correct, since the actual
70 * value can be anything, nodes or atomic values.
72 * This extremely dynamic case is handled by ArgumentConverter which is inserted for
73 * ArgumentReference that has the static type @c item(), when atomic value are asked
74 * for. At runtime it atomizes/let values through appropriately.
76 * @author Frans Englich <frans.englich@nokia.com>
77 * @ingroup Patternist_expressions
79 class ArgumentConverter : public UntypedAtomicConverter
82 ArgumentConverter(const Expression::Ptr &operand,
83 const ItemType::Ptr &reqType);
85 virtual Item evaluateSingleton(const DynamicContext::Ptr &) const;
86 virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &) const;
87 virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
88 inline Item::Iterator::Ptr mapToSequence(const Item &item,
89 const DynamicContext::Ptr &context) const;
90 virtual SequenceType::List expectedOperandTypes() const;
91 virtual SequenceType::Ptr staticType() const;
94 typedef QExplicitlySharedDataPointer<const ArgumentConverter> ConstPtr;