[GHC] #9778: Namespace collision detection for promoted types

[GHC]

#9778: Namespace collision detection for promoted types
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              Reporter:  crockeea    |            Owner:
                  Type:  feature     |           Status:  new
  request                            |        Milestone:
              Priority:  normal      |          Version:  7.8.3
             Component:  Compiler    |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by rwbarton):

 Well, DataKinds does always promote to `'S`. It just also promotes to `S`.
 But you could avoid ever using the un-`'`ed form of a promoted
 constructor; that's up to you. Are you asking for a `-fwarn-implicit-
 promoted-constructors`? That should probably not be the default, as the
 currently common style is not to write `'True` and `'False` everywhere.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9778#comment:6>
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