#5863: Deriving Typeable for data families
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Reporter: simonpj | Owner:
Type: bug | Status: new
Priority: normal | Milestone: 7.6.2
Component: Compiler | Version: 7.4.1
Keywords: | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: None/Unknown
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Comment(by simonpj):
You've convinced me to be dubious about #7897 (see comment added). So
yes, let's disable `deriving Typeable` for family instances, with a
message saying that you need to derive it for the family itself. And some
words for the user manual would be good. Thanks.
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5863#comment:6>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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