Re: [GHC] #12560: ‘:info TYPE’ mentions any instance that includes ‘Type’

[GHC]

#12560: ‘:info TYPE’ mentions any instance that includes ‘Type’
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        Reporter:  Iceland_jack      |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by goldfire):

 By mentioning `-fprint-explicit-kinds` above, do you mean to suggest
 `:info T` should print only those instances where the use of `T` is
 visible? That's plausible, but not what's done now.

 `:info *` won't list instances because `*` is a type synonym.

 Hackage doesn't list instances for `*` for the same reason. But it also
 doesn't list instances for `TYPE`. This last bit is because `TYPE` lives
 in `ghc-prim` and the instances live in `base`, so Haddock hasn't seen
 them yet.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12560#comment:3>
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