#15658: strange inferred kind with TypeInType -------------------------------------+------------------------------------- Reporter: dmwit | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.4.2 Resolution: | Keywords: TypeInType, | GHCProposal Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by dmwit): I agree: it should be documented with some care. Here is another case worth discussing when writing the documentation. If I try to follow your reasoning for a modified type family, say: {{{ type family G a :: a }}} I reason that it should be: {{{ G :: forall (a :: *) -> a }}} So without the explicit kinding, I would expect ghci to give `G` the kind `forall a -> a`. But ghci does not agree: {{{
:k G G :: a }}}
-- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15658#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler