#1968: data family + GADT: not implemented yet
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Reporter: Remi | Owner: chak
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler (Type checker) | Version: 6.9
Severity: normal | Resolution:
Keywords: data type family GADT choose_univs | Difficulty: Unknown
Testcase: | Architecture: Unknown
Os: Unknown |
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Changes (by chak):
* owner: => chak
* summary: data family + GADT = Non-exhaustive patterns in function
choose_univs => data family + GADT: not
implemented yet
Comment:
GADT syntax for data families is not supported yet, I would have expected
a better error message, though. In your example, there is actually no
need to use GADT syntax, just write
{{{
data family HiThere a :: *
data instance HiThere () = HiThere
}}}
and you should be fine.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1968#comment:1>
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