#12240: Common Sense for Type Classes -------------------------------------+------------------------------------- Reporter: Mathnerd314 | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Mathnerd314): This is a request to allow instance dispatch to make inferred types more specific. I still think this should compile, and I even have a GHC branch where it does. It is quite simple; you just have to change `tcMatchTys` to `tcUnifyTys`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12240#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler