#13178: Generalize type of runRW# -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: Type: feature | Status: new request | Priority: normal | Milestone: 8.2.1 Component: Compiler | Version: 8.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Currently, we have {{{#!hs runRW# :: (State# RealWorld -> (# State# RealWorld, o #)) -> (# State# RealWorld, o #) }}} where `o` is open-kinded. This type is a bit annoying, because `runRW#` is very often used in contexts where we want to discard the state token. I think it should be easy to generalize, however: {{{#!hs runRW# :: (State# RealWorld -> o) -> o }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13178 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler