QPatternist::NumericToBooleanCaster Class Reference

Casts any numeric value to xs:boolean. More...

#include <qatomiccasters_p.h>

Inheritance diagram for QPatternist::NumericToBooleanCaster:

Public Functions
virtual Item	castFrom (const Item &from, const QExplicitlySharedDataPointer< DynamicContext > &context) const
Public Functions inherited from QPatternist::AtomicCaster
	AtomicCaster ()
virtual	~AtomicCaster ()
Public Functions inherited from QPatternist::AtomicTypeVisitorResult
	AtomicTypeVisitorResult ()
virtual	~AtomicTypeVisitorResult ()
Public Functions inherited from QSharedData
	QSharedData ()
	Constructs a QSharedData object with a reference count of 0. More...
	QSharedData (const QSharedData &)
	Constructs a QSharedData object with reference count 0. More...

Additional Inherited Members
Public Types inherited from QPatternist::AtomicCaster
typedef QExplicitlySharedDataPointer< AtomicCaster >	Ptr
Public Types inherited from QPatternist::AtomicTypeVisitorResult
typedef QExplicitlySharedDataPointer< AtomicTypeVisitorResult >	Ptr
Public Variables inherited from QSharedData
QAtomicInt	ref

Detailed Description

Casts any numeric value to xs:boolean.

Author

Frans Englich frans.nosp@m..eng.nosp@m.lich@.nosp@m.noki.nosp@m.a.com

Definition at line 185 of file qatomiccasters_p.h.

Functions

castFrom()

Item NumericToBooleanCaster::castFrom ( const Item &  from, const QExplicitlySharedDataPointer< DynamicContext > &  context  ) const

virtual

Casts from to an atomic value of the type this class casts to, and returns that value. The context is used for reporting errors in case the casting fails, and to in general access information from the dynamic context.

Implements QPatternist::AtomicCaster.

Definition at line 108 of file qatomiccasters.cpp.

{
    const xsDouble val = from.as<Numeric>()->toDouble();
    if(Double::isEqual(val, 0.0) || qIsNaN(val))
        return CommonValues::BooleanFalse;
    else
        return CommonValues::BooleanTrue;
}

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The documentation for this class was generated from the following files:

• /src/xmlpatterns/data/qatomiccasters_p.h
• /src/xmlpatterns/data/qatomiccasters.cpp