Is D floating point semantics too advanced?

[Bruno Medeiros]

Sean Kelly wrote:
> Walter Bright wrote:
>> Hans-Eric Grönlund wrote:
>>> I've written a post on my blog wondering if the floating point
>>> semantics is too advanced. The problem I have with it is that I can't
>>> write something like this:
>>>
>>> if (someValue == real.nan) {...}
>>>
>>> It will never be true, which - for me - is unintuitive.
>>
>> The behavior is as specified by the floating point standard IEEE 754. 
>> To change it would break from FORTRAN, C and C++ usage in a way that 
>> would silently break code that is transliterated.
> 
> It would be a horrible inconsistency, but the 'is' operator could be 
> made to return true in this instance.  After all, 'is' tests identity, 
> not equality.
> 
> 
> Sean

Why would it be inconsistent? Because the equality contract states that 
anything that has the same identity, should also compare equal?

-- 
Bruno Medeiros - MSc in CS/E student
http://www.prowiki.org/wiki4d/wiki.cgi?BrunoMedeiros#D