isNaN()

isNaN(x) provides a reliable way to determine if x is one of the "not a number" floating point forms. More...

Functions
bool	SimTK::isNaN (const negator< float > &x)
bool	SimTK::isNaN (const negator< double > &x)
bool	SimTK::isNaN (const negator< long double > &x)
template<class P >
bool	SimTK::isNaN (const negator< std::complex< P > > &x)
template<class P >
bool	SimTK::isNaN (const negator< conjugate< P > > &x)
bool	SimTK::isNaN (const float &x)
bool	SimTK::isNaN (const double &x)
bool	SimTK::isNaN (const long double &x)
template<class P >
bool	SimTK::isNaN (const std::complex< P > &x)
template<class P >
bool	SimTK::isNaN (const conjugate< P > &x)

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Detailed Description

isNaN(x) provides a reliable way to determine if x is one of the "not a number" floating point forms.

Comparing x==NaN does not work because any relational operation involving NaN always return false, even (NaN==NaN)! This routine is specialized for all SimTK scalar types:

• float, double, long double
• std::complex<P> (P is one of the above precisions)
• SimTK::conjugate<P>
• SimTK::negator<T> (T is any of the above)

For complex and conjugate types, isNaN() returns true if either the real or imaginary part or both are NaN.

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Function Documentation

bool SimTK::isNaN

(

const negator< float > &

x

)

[inline]

bool SimTK::isNaN

(

const negator< double > &

x

)

[inline]

bool SimTK::isNaN

(

const negator< long double > &

x

)

[inline]

template<class P >

bool SimTK::isNaN

(

const negator< std::complex< P > > &

x

)

[inline]

template<class P >

bool SimTK::isNaN

(

const negator< conjugate< P > > &

x

)

[inline]

bool SimTK::isNaN

(

const float &

x

)

[inline]

bool SimTK::isNaN

(

const double &

x

)

[inline]

bool SimTK::isNaN

(

const long double &

x

)

[inline]

template<class P >

bool SimTK::isNaN

(

const std::complex< P > &

x

)

[inline]

template<class P >

bool SimTK::isNaN

(

const conjugate< P > &

x

)

[inline]