#11719: Cannot use higher-rank kinds with type families -------------------------------------+------------------------------------- Reporter: ocharles | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.8.1 Component: Compiler (Type | Version: 8.0.1-rc2 checker) | Resolution: | Keywords: TypeInType Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: GHC rejects | Test Case: valid program | dependent/should_compile/T11719 Blocked By: | Blocking: Related Tickets: #13913, #14268 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by goldfire): comment:23 is a feature request. The use of a type variable in a type family equation -- even on the left-hand side -- is an occurrence, not a binding site. Type families aren't functions! So I think it's OK as is, myself. Someday, we'll just have type-level functions, and then all of this will be better. :) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11719#comment:24 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler