#12119: Can't create injective type family equation with TypeError as the RHS -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.0.1 checker) | Keywords: Resolution: | CustomTypeErrors, TypeFamilies, | InjectiveFamilies 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):
Of course, there's still Simon's point about formalizing this idea, which I have yet to do.
Yes: formalising it at least into a GHC propoosal would be good: it's a user-facing change. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12119#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler