On Fri, 15 Aug 2008, Jules Bean wrote:
Malcolm Wallace wrote:
Andrew Coppin <[EMAIL PROTECTED]> wrote:
instnace Show (Foo Int) ...
instnace Show (Foo Double) ...
...WHY did I not think of this myself? o_O
Because it is not Haskell'98? It requires {-# LANGUAGE
OverlappingInstances #-}
No it doesn't?
It requires the much more semantically simple -XFlexibleInstances, as far as
I know.
Overlapping would only be needed if there was also a polymorphic instance on
Foo a?
Btw. was anything bad about the suggested Haskell98 solution?
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