#13248: Allow an injective type family RHS to be another injective type family -------------------------------------+------------------------------------- Reporter: mniip | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.0.1 checker) | Resolution: | Keywords: 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 simonpj): If I recall correctly this is by design. It's explained in [https://www.microsoft.com/en-us/research/publication/injective-type- families-haskell/ Section 4.1 of the paper]. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13248#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler