#9112: data families with representational matching -------------------------------------+------------------------------------ Reporter: jwlato | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Changes (by liyang): * cc: hackage.haskell.org@… (added) Comment: I'm not sure using [http://hackage.haskell.org/package/vector-th-unbox vector-th-unbox] counts as a complete workaround, as it amounts to giving the instance in full. Without coerce, I think it's also susceptible to the expensive "map id" issue. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9112#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler