[GHC] #10751: Implement Phase 1 of MonadFail Proposal (MFP)

[GHC]

#10751: Implement Phase 1 of MonadFail Proposal (MFP)
-------------------------------------+-------------------------------------
        Reporter:  hvr               |                Owner:  quchen
            Type:  task              |               Status:  patch
        Priority:  highest           |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  7.10.2
      Resolution:                    |             Keywords:  report-impact
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1248
-------------------------------------+-------------------------------------

Comment (by Ben Gamari <bgamari.foss@…>):

 In [changeset:"233d1312bf15940fca5feca6884f965e7944b555/ghc" 233d131/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="233d1312bf15940fca5feca6884f965e7944b555"
 MonadFail proposal, phase 1

 This implements phase 1 of the MonadFail proposal (MFP, #10751).

 - MonadFail warnings are all issued as desired, tunable with two new flags
 - GHC was *not* made warning-free with `-fwarn-missing-monadfail-warnings`
   (but it's disabled by default right now)

 Credits/thanks to
 - Franz Thoma, whose help was crucial to implementing this
 - My employer TNG Technology Consulting GmbH for partially funding us
   for this work

 Reviewers: goldfire, austin, #core_libraries_committee, hvr, bgamari,
 fmthoma

 Reviewed By: hvr, bgamari, fmthoma

 Subscribers: thomie

 Projects: #ghc

 Differential Revision: https://phabricator.haskell.org/D1248

 GHC Trac Issues: #10751
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10751#comment:18>
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