#11714: Kind of (->) type constructor is overly constrained -------------------------------------+------------------------------------- Reporter: bgamari | Owner: Type: feature request | Status: new Priority: normal | Milestone: 8.2.1 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: | -------------------------------------+------------------------------------- Comment (by goldfire):
{{{#!hs (->) :: forall (rep1 :: RuntimeRep) (rep2 :: RuntimeRep). TYPE rep1 -> TYPE rep2 -> * }}}
Yes, this is exactly what we need. But I daresay this will be a performance disaster, littering Core with extra `RuntimeRep` arguments at every arrow, and requiring a substitution to get `->`'s kind. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11714#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler