[Haskell] PROPOSAL: class aliases

[Wolfgang Jeltsch]

Am Donnerstag, 13. Oktober 2005 12:22 schrieb John Meacham:
> [...]

> although perhaps
>
> >   class alias FooBar a = (Foo a, Bar a)  where ...
>
> since the new name introduced usually appears to the left of an equals
> sign.

Yes, exactly.

> This also solves the problems of where to put new supertype constraints.
>
> >   class alias FooBar a = Show a => (Foo a, Bar a)  where ...
>
> should do nicely.

What is the difference between this and the following:

	class alias FooBar a = (Show a, Foo a, Bar a) where ...

> [...]

Best wishes,
Wolfgang