RecordWildCards doesn't work with associated datatypes inside class instances
It seems like record wildcards (the ".." notation) don't work in the following scenario.
I tried with a standalone associated datatype and it works fine.
Tested with 6.10.1 and 6.11.20090103.
{-# LANGUAGE TypeFamilies, RecordWildCards #-}
module AssocWildCards where
class FooClass a where
data FooType a
instance FooClass Int where
data FooType Int = FooInt { fooIntVal :: Int }
fooInt :: Int -> FooType Int
fooInt fooIntVal = FooInt{..}
fromFooInt :: FooType Int -> Int
fromFooInt FooInt{..} = fooIntVal
Trac metadata
| Trac field | Value |
|---|---|
| Version | 6.11 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | ganesh.sittampalam@credit-suisse.com |
| Operating system | |
| Architecture |