#10114: Kind mismatches with AnyK in rank-2 types -------------------------------------+------------------------------------- Reporter: cam | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.4 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by simonpj): In comment:3 I think I was confusing these two things: {{{ T = forall k. blah T :: forall k. blah -- Uses of T must be applied to a kind }}} So I think I retract my claim in comment:1. Perhaps we do want to generalise "inside". Can anyone say why it is "generally more common to restrict the body of a forall to have kind `*`"? I can't articulate a clear argument. In GHC's case, a good reason not to do this was types like `forall a. a -> (# a, a #)`, but levity polymorpism will help here. Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10114#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler