[core libraries] Re: Tightening up on inferred type signatures

[Simon Peyton Jones]

| Independent of language extensions, what about types and classes whose
| names are not in scope.  Is there an implicit "... if you import all
| the relevant symbols" and the end of the rule?

Good point.  I'm honestly unsure how far to push this one!  (It'd be relatively easy to check whether they were in scope and complain if not, but ...)

Simon

| -----Original Message-----
| From: haskell-core-libraries at googlegroups.com [mailto:haskell-core-
| libraries at googlegroups.com] On Behalf Of David Mazieres
| Sent: 22 April 2014 00:41
| To: Simon Peyton Jones; Haskell Libraries (libraries at haskell.org);
| core-libraries-committee at haskell.org; GHC users
| Subject: [core libraries] Re: Tightening up on inferred type signatures
| 
| Simon Peyton Jones <simonpj at microsoft.com> writes:
| 
| > GHC generally obeys this rule
| >
| > * If GHC infers a type f::type, then it's OK for you to add a type
| > signature saying exactly that.
| 
| Independent of language extensions, what about types and classes whose
| names are not in scope.  Is there an implicit "... if you import all
| the relevant symbols" and the end of the rule?
| 
| David
| 
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