[GHC] #12105: merge MatchFixity and HsMatchContext

[GHC]

#12105: merge MatchFixity and HsMatchContext
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        Reporter:  alanz             |                Owner:  alanz
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      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:D2271
       Wiki Page:                    |
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Comment (by Alan Zimmerman <alan.zimm@…>):

 In [changeset:"a13cb27960f9bdb0bc9eececf9159f034f113481/ghc" a13cb27/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="a13cb27960f9bdb0bc9eececf9159f034f113481"
 Merge MatchFixity and HsMatchContext

 Summary:
 MatchFixity was introduced to facilitate use of API Annotations.

 HsMatchContext does the same thing with more detail, but is chased
 through all over the place to provide context when processing a Match.

 Since we already have MatchFixity in the Match, it may as well provide
 the full context.

 updates submodule haddock

 Test Plan: ./validate

 Reviewers: austin, goldfire, bgamari

 Subscribers: thomie, mpickering

 Differential Revision: https://phabricator.haskell.org/D2271

 GHC Trac Issues: #12105

 (cherry picked from commit 306ecad591951521ac3f5888ca8be85bf749d271)
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12105#comment:3>
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