Re: [GHC] #12047: Users Guide: GeneralizedNewtypeDeriving derives “instance Num Int => Num Dollars”

27 May 2016

      #12047: Users Guide: GeneralizedNewtypeDeriving derives “instance Num Int => Num
Dollars”
-------------------------------------+-------------------------------------
        Reporter:  Iceland_jack      |                Owner:
            Type:  task              |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Documentation     |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Documentation     |  Unknown/Multiple
  bug                                |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2273
       Wiki Page:                    |
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Comment (by Ryan Scott ):

 In [changeset:"d0dd572b707631a104e060711faf9bd169bdc968/ghc"
 d0dd572b/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="d0dd572b707631a104e060711faf9bd169bdc968"
 Clarify users' guide section on GeneralizedNewtypeDeriving

 Summary:
 It seemed to imply that GHC was generating infelicitous code when it
 actually wasn't. Fixes #12047.

 Reviewers: hvr, bgamari, austin

 Reviewed By: austin

 Subscribers: thomie, Iceland_jack

 Differential Revision: https://phabricator.haskell.org/D2273

 GHC Trac Issues: #12047
 }}}

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Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12047#comment:6
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