Re: [boost] is_nan

Johan Råde wrote:

So it would make sense to have the functions

is_finite() is_normal() is_subnormal()

is_infinity() is_plus_infinity() is_minus_infinity()

is_nan()

Do we really want to use gratuitously different names from those in C99: isfinite isnorm isinf isnan ?

and possibly

is_quite_nan() is_signalling_nan()

The last two are tricky to implement though.

Actually probably impossible without decoding the bits in the FP number - for which you would have to deal with multiple formats in multiple endianness's etc. John.