#13105: Allow type families in RuntimeReps -------------------------------------+------------------------------------- Reporter: goldfire | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: | LevityPolymorphism Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | typecheck/should_fail/T13105 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): I was thinking of this as an adjunct to the LP test in the desugarer. If the argument of an application has type `ty :: TYPE k`, and `k` does not pass the LP test (yet), then normalise `k` (using top level instances only) and cast the arg wtih a coercion `TYPE k ~ TYPE k_norm`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13105#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler