floating point verification using is?

bearophile bearophileHUGS at lycos.com
Fri Dec 18 11:50:02 PST 2009

Steven Schveighoffer:
> to me, is means "ignore semantic meaning, do a bitwise compare" regardless  
> of reference status.
> For example comparing 2 array structs using == will check that all the  
> data is the same, but using "is" makes it compare bitwise the structs  
> directly.
> I see no difference with floating points, except you can't get at the bits  
> easily.  The existence of isIdentical could be completely replaced by one  
> or two instructions generated by the compiler when it sees "float is  
> float".

You can try expressing this idea in the main D group.


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