[GHC] #11135: Migrate more of Data.Functor.* from transformers to base.

[GHC]

#11135: Migrate more of Data.Functor.* from transformers to base.
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        Reporter:  hvr               |                Owner:
            Type:  task              |               Status:  upstream
        Priority:  highest           |            Milestone:  8.0.1
       Component:  libraries/base    |              Version:  7.10.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1543
       Wiki Page:                    |  Phab:D1544 Phab:D1630
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Comment (by RyanGlScott):

 Replying to [comment:14 ross]:
 > I believe I've fixed the Show1/Read1 issue.

 Thanks, Ross!

 There may be time to make this in for GHC 8.0 after all. I've prepared a
 [http://hub.darcs.net/RyanGlScott/transformers/patch/6550957b47ffd09e5250a50712aac579d91b0184
 patch] for `transformers` which does the appropriate `legacy711` migration
 of the `Data.Functor.*` modules, and backports
 `Typeable`/`Data`/`Generic`/`Generic1` instances that will be introduced
 in `base`.

 Note that there are some [https://ghc.haskell.org/trac/ghc/ticket/10524
 bad interactions] between derived classes and `PolyKinds`, so I had to
 employ a few tricks to get the backported instances to work on old
 versions of GHC. Nevertheless, I tested my changes against every major
 version of GHC from 7.0–7.10, so this shouldn't break anything.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11135#comment:15>
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