#2435: Qualified name required when defining type family instance in instance
declaration
------------------------+---------------------------------------------------
Reporter: rl | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 6.9 | Severity: normal
Keywords: | Testcase:
Architecture: Unknown | Os: Unknown
------------------------+---------------------------------------------------
With these two modules, GHC gives the following error:
{{{
Bar.hs:3:30: Not in scope: type constructor or class `T'
}}}
I have to use Foo.T in the instance definition. This is inconsistent with
method definitions which must use unqualified names.
{{{
module Foo where
class C a where type T a
}}}
{{{
module Bar where
import qualified Foo
instance Foo.C Int where type T Int = Int
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2435>
GHC <http://www.haskell.org/ghc/>
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