MRIsNaN.h

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#pragma once
 
#include <limits>
 
#if __cpp_lib_bit_cast >= 201806L
#include <bit>
#else
#include <cmath>
#endif
 
namespace MR
{
 
 
constexpr float cQuietNan = std::numeric_limits<float>::quiet_NaN();
#if __cpp_lib_bit_cast >= 201806L
constexpr int cQuietNanBits = std::bit_cast< int >( cQuietNan );
#endif

inline bool isNanFast( float f )
{
#if __cpp_lib_bit_cast >= 201806L
    return std::bit_cast< int >( f ) == cQuietNanBits;
#else
    return std::isnan( f );
#endif
}
 
}