[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
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Iceland_jack):

 Were you thinking of #8708? Removing this restriction would help make the
 `:kind` command less surprising:

 {{{
 >>> :kind Int
 Int :: *
 >>> :kind Int :: *
   <parse error>
 }}}

 where one might expect it to work like

 {{{
 >>> :type 'a'
 'a' :: Char
 >>> :type 'a' :: Char
 'a' :: Char :: Char
 }}}

 While we're at it, is it possible to automatically quantify free
 variables?

 {{{
 >>> :kind Maybe
 Maybe :: * -> *
 >>> :kind Maybe a
   <not-in-scope error>
 }}}

 Explicitly quantifying the variables gets tiresome when there are more of
 them

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11622#comment:2>
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