[GHC] #11622: Annotating types in type familiy equations without parentheses

[GHC]

#11622: Annotating types in type familiy equations without parentheses
-------------------------------------+-------------------------------------
           Reporter:  Iceland_jack   |             Owner:
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 When annotating types in right-hand side of type family equations
 parentheses are required:

 {{{#!hs
 type family
   F a where
   F _ = (Int :: Type)
 }}}

 instead of

 {{{#!hs
 type family
   F a where
   F _ = Int :: Type
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11622>
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