#13735: RankNTypes don't work with PatternSynonyms -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: (none) Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: invalid | Keywords: | PatternSynonyms 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 dfeuer): I think what you'd really want would be to have something like {{{#!hs data PLambda' = Var' (forall a. a) | ... | Lam' (forall a. a -> PLambda a) | ... }}} and then have some non-disgusting way to produce a function {{{#!hs convert :: Lam -> PLambda' }}} As I said, though, I don't see a nice way. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13735#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler