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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_ComparingAggregator_H |
| #define Patternist_ComparingAggregator_H |
| |
| /** |
| * @file qcomparingaggregator_p.h |
| * @short Contains the implementations for the functions <tt>fn:max()</tt>, MaxFN, |
| * and <tt>fn:min()</tt>, MinFN, and the class ComparingAggregator. |
| */ |
| |
| #include <private/qabstractfloat_p.h> |
| #include <private/qdecimal_p.h> |
| #include <private/qcastingplatform_p.h> |
| #include <private/qcomparisonplatform_p.h> |
| #include <private/qliteral_p.h> |
| #include <private/qaggregator_p.h> |
| #include <private/quntypedatomicconverter_p.h> |
| #include <private/qpatternistlocale_p.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace QPatternist |
| { |
| /** |
| * @short Base class for the implementations of the <tt>fn:min()</tt> and <tt>fn:max()</tt> function. |
| * |
| * What function that more specifically is |
| * followed, depends on how the constructor is called. |
| * |
| * @see MaxFN |
| * @see MinFN |
| * @ingroup Patternist_functions |
| * @author Frans Englich <frans.englich@nokia.com> |
| */ |
| template <AtomicComparator::Operator oper, AtomicComparator::ComparisonResult result> |
| class ComparingAggregator : public Aggregator, |
| public ComparisonPlatform<ComparingAggregator<oper, result>, |
| true, AtomicComparator::AsValueComparison, |
| ReportContext::FORG0006>, |
| public CastingPlatform<ComparingAggregator<oper, result>, true> |
| { |
| public: |
| virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
| virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, |
| const SequenceType::Ptr &reqType); |
| |
| inline AtomicComparator::Operator operatorID() const |
| { |
| return oper; |
| } |
| |
| inline ItemType::Ptr targetType() const |
| { |
| return BuiltinTypes::xsDouble; |
| } |
| |
| private: |
| inline Item applyNumericPromotion(const Item &old, |
| const Item &nev, |
| const Item &newVal) const; |
| |
| using ComparisonPlatform<ComparingAggregator<oper, result>, |
| true, |
| AtomicComparator::AsValueComparison, |
| ReportContext::FORG0006>::comparator; |
| using ComparisonPlatform<ComparingAggregator<oper, result>, |
| true, |
| AtomicComparator::AsValueComparison, |
| ReportContext::FORG0006>::fetchComparator; |
| using CastingPlatform<ComparingAggregator<oper, result>, true>::cast; |
| }; |
| |
| #include "qcomparingaggregator_tpl_p.h" |
| |
| /** |
| * @short An instantiation of ComparingAggregator suitable for <tt>fn:max()</tt>. |
| * |
| * @ingroup Patternist_functions |
| */ |
| typedef ComparingAggregator<AtomicComparator::OperatorGreaterThan, AtomicComparator::GreaterThan> MaxFN; |
| |
| /** |
| * @short An instantiation of ComparingAggregator suitable for <tt>fn:max()</tt>. |
| * |
| * @ingroup Patternist_functions |
| */ |
| typedef ComparingAggregator<AtomicComparator::OperatorLessThan, AtomicComparator::LessThan> MinFN; |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif |