[GHC] #15622: Generalize `E{0,1,2,3,6,9,12}` from `Data.Fixed`

[GHC]

#15622: Generalize `E{0,1,2,3,6,9,12}` from `Data.Fixed`
-------------------------------------+-------------------------------------
        Reporter:  rockbmb           |                Owner:  rockbmb
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Core Libraries    |              Version:  8.4.3
      Resolution:                    |             Keywords:  base,
                                     |  Data.Fixed
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by RyanGlScott):

 Indeed, since this proposes to change the existing API in `Data.Fixed`, I
 would first send a mail to the libraries mailing list (which Bodigrim has
 linked to in comment:6) and solicit community feedback. If there is a
 consensus that this change should be adopted, we can proceed forward with
 the actual implementation.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15622#comment:7>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler