[GHC] #7730: :info and polykinds

[GHC]

#7730: :info and polykinds
--------------------------------------------+------------------------------
        Reporter:  monoidal                 |            Owner:  archblob
            Type:  bug                      |           Status:  new
        Priority:  normal                   |        Milestone:  7.8.3
       Component:  Compiler (Type checker)  |          Version:  7.6.2
      Resolution:                           |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  None/Unknown             |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:  #8776
--------------------------------------------+------------------------------

Comment (by archblob):

 Not sure what you mean.

 (1) Short example, we just need the types:
     {{{
     context :: a1 ~ a2 => a1 -> a2
     context = undefined
     }}}
     We should see {{{context :: (~) a1 a2 => a1 -> a2}}} without {{{
 -fprint-explicit-kinds }}} but   we see {{{context :: (~) * a1 a2 => a1 ->
 a2}}} as if {{{ -print-explicit-kinds }}} is on. This is because I don't
 know yet how to suppres kinds from the {{{IfaceTyConApp}}} tys.

  Same with:
     {{{
     data A x y

     fun :: A x y -> a
     fun = undefined
     }}}
     where {{{:info}}} shows {{{fun :: A k1 k2 x y -> a}}}

 (2) {{{ data STest = P !Int | Q {-# UNPACK #-} !Int | R {-# NOUNPACK #-}
 !Int }}}
     We see only {{{ IfStrict }}} comming out,  so when doing :info we get
     {{{ data STest = P !Int | Q !Int | R !Int }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7730#comment:26>
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