[GHC] #8177: Roles for type families

[GHC]

#8177: Roles for type families
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        Reporter:  simonpj           |                Owner:  goldfire
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  ⊥
       Component:  Compiler          |              Version:  7.6.3
      Resolution:                    |             Keywords:  TypeFamilies
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3662
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * differential:   => Phab:D3662


Comment:

 I've uploaded a rough attempt at implementing support for roles for closed
 type families at Phab:D3662, although there are still some bugs to work
 out (for instance, the program in comment:32 doesn't typecheck yet,
 unfortunately).

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8177#comment:35>
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