[GHC] #12160: MonadFail instance for (Either String)?

[GHC]

#12160: MonadFail instance for (Either String)?
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        Reporter:  lexi.lambda       |                Owner:  (none)
            Type:  feature request   |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  libraries         |              Version:  8.0.1
  (other)                            |
      Resolution:  wontfix           |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #9588             |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by dmbergey):

 * status:  new => closed
 * resolution:   => wontfix


Comment:

 As of 2018, the libraries committee has rejected this change.  The mailing
 list discussion is at:

 https://mail.haskell.org/pipermail/libraries/2018-October/028988.html

 The concerns are that:
 - the instances "get in the way of a user who wants to treat the parameter
 uniformly"
 - `IsString` is too far from standard Haskell (and unlikely to be added to
 the standard)

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12160#comment:15>
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