Re: [Haskell-cafe] same function's type accepted in top level, but rejected in where clause

8 Jul 2013


      On Fri, Jul 5, 2013 at 11:03 PM, Ömer Sinan Ağacan wrote:
...
There's an implicit quantifier in type of `f`, like this: `f :: forall
a. a -> ListF a a`. When I add `ScopedTypeVariables` and `forall a.
...` in top level definition, it's like all `a`s in scope of top level
definition are same, except when explicitly defined as `forall a.
...`.
Is my intuition correct?
Yes it is ! :)
ScopedTypeVariables is a very nice and non problematic extension, it may
even be made part of some future Haskell standard.
-- 
Jedaï

Re: [Haskell-cafe] same function's type accepted in top level, but rejected in where clause

Chaddaï Fouché