#13262: Allow type synonym family application in instance head if it reduces away -------------------------------------+------------------------------------- Reporter: ezyang | Owner: Type: feature request | Status: new Priority: lowest | 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 ezyang): By analogy, though, `TypeSynonymInstances` are also distasteful, because it's effectively letting you write `myfalse = False; f myfalse = 5` (well, that doesn't actually do what you want in Haskell today :o) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13262#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler