[GHC] #11252: :kind command hides the explicit kind

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Fri Dec 18 13:18:01 UTC 2015


#11252: :kind command hides the explicit kind
-------------------------------------+-------------------------------------
        Reporter:  Iceland_jack      |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  GHCi              |              Version:  7.11
      Resolution:                    |             Keywords:  TypeInType
Operating System:  Linux             |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Description changed by Iceland_jack:

Old description:

> {{{#!hs
> -- /tmp/test.hs
> {-# LANGUAGE TypeInType #-}
>
> data Proxy1 k (a :: k) = P1
> data Proxy2   (a :: k) = P2
> }}}
>
> if I load the following into ghci (head) the `:kind` command gives the
> same result
>
> {{{#!haskell
> % ghci -ignore-dot-ghci /tmp/test.hs
> GHCi, version 7.11.20151216: http://www.haskell.org/ghc/  :? for help
> [1 of 1] Compiling Main             ( test.hs, interpreted )
> Ok, modules loaded: Main.
> *Main> :kind Proxy1
> :kind Proxy1
> Proxy1 :: k -> *
> *Main> :kind Proxy2
> :kind Proxy2
> Proxy2 :: k -> *
> }}}

New description:

 {{{#!hs
 -- /tmp/test.hs
 {-# LANGUAGE TypeInType #-}

 data Proxy1 k (a :: k) = P1
 data Proxy2   (a :: k) = P2
 }}}

 if I load the following into ghci (head) the `:kind` command gives the
 same result

 {{{#!haskell
 % ghci -ignore-dot-ghci /tmp/test.hs
 GHCi, version 7.11.20151216: http://www.haskell.org/ghc/  :? for help
 [1 of 1] Compiling Main             ( test.hs, interpreted )
 Ok, modules loaded: Main.
 *Main> :kind Proxy1
 :kind Proxy1
 Proxy1 :: k -> *
 *Main> :kind Proxy2
 :kind Proxy2
 Proxy2 :: k -> *
 }}}

 edit: I asked on #ghc, was told this was undesirable

--

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11252#comment:1>
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