Remi Turk wrote:
I wouldn't bet on it either:
Prelude> 0.0 == -0.0
True
Prelude> isNegativeZero 0.0 == isNegativeZero (-0.0)
False
Although isNegativeZero might be considered a ``private,
"internal" interface that exposes implementation details.''
Interesting example.
So is the correct conclusion from this that all (polymorphic) code
that assumes (x == y) = True implies x=y is inherently broken,
or is just this particular Eq instance that's broken?
Regards
--
Adrian Hey
_______________________________________________
Haskell-Cafe mailing list
[email protected]
http://www.haskell.org/mailman/listinfo/haskell-cafe
