#16148: Better type inference for Constraint vs Type -------------------------------------+------------------------------------- Reporter: simonpj | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.6.3 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 simonpj):
(C) doesn't work
Are you sure? I was not expecting any quantification whatsoever over the T/C thing. You say "don't worry about levity polymorphism", but the example you give is explicitly ruled out by our lev-poly story. Can you give an example that would be allowed by lev-poly but would give rise to instantiation problems? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16148#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler