[GHC] #15050: ScopedTypeVariables could allow more programs

[GHC]

#15050: ScopedTypeVariables could allow more programs
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        Reporter:  nomeata           |                Owner:  (none)
            Type:  feature request   |               Status:  patch
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  8.4.1
      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:D4980
       Wiki Page:                    |
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Comment (by Joachim Breitner <mail@…>):

 In [changeset:"4d91cabcd5e3c603997d9876f6d30204a9b029c6/ghc"
 4d91cabc/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="4d91cabcd5e3c603997d9876f6d30204a9b029c6"
 Allow scoped type variables refer to types

 This patch implements GHC proposal 29:
 (sorry, URL is too long for the commit message linter)
 and fixess #15050.

 The change is simple: Just use a different meta variable form.

 Test suite and documentation updated.

 Differential Revision: https://phabricator.haskell.org/D4980
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15050#comment:21>
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