#11658: Type synonym with context in pattern synonym -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 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 goldfire): While I understand why the syntax might suggest that this is a good idea. I don't support this proposal. The thing after `pattern Blah ::` is '''not''' a type. It's a pattern synonym type, which is something else. Of course, type synonyms should be allowed in pattern synonym types, but we shouldn't confuse the normal `=>` that might appear in a type synonym with the `=>` that appears in a pattern synonym type. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11658#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler