Re: [boost] The meaning of -nan (was [serialization] facets for non-finite numbers)

Paul A Bristow wrote:

But a NaN is a NaN, whatever the sign, only the exponent field determines NaN-ness AFAIK.

Apart from sign there are also lots of significand bits whose meaning is officially undefined.

The exponent field is all 1's, just like infinity, but the mantissa field has at least one 1 bit. All 0's in the mantissa would be infinity. -- Dick Hadsell 914-259-6320 Fax: 914-259-6499 Reply-to: hadsell@blueskystudios.com Blue Sky Studios http://www.blueskystudios.com 44 South Broadway, White Plains, NY 10601