[GHC] #14630: name shadowing warnings by record pattern synonyms + RecordWildCards or NamedFieldPuns

[GHC]

#14630: name shadowing warnings by record pattern synonyms + RecordWildCards or
NamedFieldPuns
-------------------------------------+-------------------------------------
        Reporter:  mizunashi_mana    |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:
                                     |  PatternSynonyms
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  error/warning at compile-time      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #11228, #11970    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by RyanGlScott):

 * related:  #11228 => #11228, #11970


Comment:

 Oh bother. Just as I finished up a patch for this, I realized that at one
 point in time, GHC did exactly what was described in comment:5 by having a
 `Parent` constructor named `PatternSynonym`. However, `PatternSynonym` was
 deliberately removed in e660f4bf546e90fb6719ad268ca3daaecdce4b82 (#11970)!
 Looking at that commit, my patch essentially just adds all of that
 functionality back plus some changes to `isRecFldGRE`.

 I'm not sure how to proceed from here—I don't want to trample on other
 people's work! mpickering, you authored of that commit: do you have an
 opinion on this?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14630#comment:6>
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