45 #include <QtCore/qglobal.h> 63 #define Q_INFINITY (QT_PREPEND_NAMESPACE(qInf)()) 64 #define Q_SNAN (QT_PREPEND_NAMESPACE(qSNaN)()) 65 #define Q_QNAN (QT_PREPEND_NAMESPACE(qQNaN)())
#define QT_END_NAMESPACE
This macro expands to.
Q_CORE_EXPORT bool qIsInf(double d)
Returns true if the double {d} is equivalent to infinity.
Q_CORE_EXPORT double qInf()
Returns the bit pattern for an infinite number as a double.
Q_CORE_EXPORT double qSNaN()
Returns the bit pattern of a signalling NaN as a double.
#define QT_BEGIN_NAMESPACE
This macro expands to.
Q_CORE_EXPORT double qQNaN()
Returns the bit pattern of a quiet NaN as a double.
Q_CORE_EXPORT bool qIsFinite(double d)
Returns true if the double {d} is a finite number.
Q_CORE_EXPORT bool qIsNaN(double d)
Returns true if the double {d} is not a number (NaN).