15 May
2006
15 May
'06
6:27 p.m.
Robert Ramey wrote:
David Abrahams wrote:
"Robert Ramey" <ramey@rrsd.com> writes:
I think we should go in the opposite direction. A float is a a legitmate floating point value. A union of float and some other special non-floating point values is something else.
Notwithstanding the fact that NaN is "not a number," it is a legitimate floating-point value, i.e. a legitimate value for the type float.
I guess it depends what one means by "legitimate". It is is certainly "legal" in C++ - no question about that fact. Its certainly not a number - no question about that either.
It depends. Where do you draw the line? Is inf a number? Is -0.0 a number? You have to have NaN if you want to be able to represent x/y as a float.