#14734: QuantifiedConstraints conflated with impredicative polymorphism? -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: (none) Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 8.5 Resolution: invalid | Keywords: | QuantifiedConstraints wipT2893 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 Iceland_jack): It would be nice to directly write `type a :- b = Dict (a => b)` rather than {{{#!hs class (a => b) => Implies a b instance (a => b) => Implies a b type a :- b = Dict (Implies a b) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14734#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler