[GHC] #9858: Typeable instances should be kind-aware

[GHC]

#9858: Typeable instances should be kind-aware
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        Reporter:  dreixel           |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  highest           |               Milestone:  7.10.1
       Component:  Compiler          |                 Version:  7.9
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by goldfire):

 To clarify comment:64, I understand that this proposal doesn't really
 change the recent patch under the hood, but just the user interface to it.
 (Yes, tracking `Typeable`-allowed-ness takes some under-the-hood work.)
 Please correct me if I'm wrong.

 I think that having `Typeable` available for every type is the right thing
 to do. It's something I have wanted for some time. This ticket just made
 the change happen now instead of soon.

 All that said, I can understand the worry that we'll paint ourselves into
 a corner here. It might be reasonable to adopt the proposal above for 7.10
 and then relax it for 7.12, when we have more time to see possible strange
 interactions.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9858#comment:65>
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