#13901: Lift the "Illegal polymorphic type" restriction on type families -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.0.1 checker) | Resolution: | Keywords: TypeFamilies Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #11962 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by goldfire): The reference to wrapper is more of an implementation detail. GHC uses a `HsWrapper` type to denote things that happen to expressions (instantiations, type abstractions, dictionary applications, etc.) that are invisible in user-written Haskell. That's all I was referring to there. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13901#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler