[GHC] #11790: (More) missing instances for Identity and Const

[GHC]

#11790: (More) missing instances for Identity and Const
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        Reporter:  duairc            |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  libraries/base    |              Version:  7.10.3
      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:D2079
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"8b57cac5974c9fffccbcae3104b5b5d18760749e/ghc" 8b57cac/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="8b57cac5974c9fffccbcae3104b5b5d18760749e"
 Added (more) missing instances for Identity and Const

   * `Identity` and `Const` now have `Num`, `Real`, `Integral`,
     `Fractional`, `Floating`, `RealFrac` and `RealFloat` instances

   * `Identity` and `Const` now have `Bits` and `FiniteBits` instances

   * `Identity` and `Const` now have `IsString` instances

 Reviewers: RyanGlScott, austin, hvr, bgamari, ekmett

 Reviewed By: ekmett

 Subscribers: nomeata, ekmett, RyanGlScott, thomie

 Differential Revision: https://phabricator.haskell.org/D2079

 GHC Trac Issues: #11790
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11790#comment:3>
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