[GHC] #9515: Deprecate -XExplicitForAll

[GHC]

#9515: Deprecate -XExplicitForAll
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              Reporter:  dfeuer      |            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 isaacdupree):

 We could change ExplicitForAll to be a subset of ScopedTypeVariables.
 Make "forall" always introduce type variable scopes, but error if any type
 variable is actually used in a scoped way without ScopedTypeVariables.

 (I am not volunteering to implement that change - I don't feel strongly
 enough about this)

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9515#comment:12>
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