#10928: Refine pattern synonym signatures -------------------------------------+------------------------------------- Reporter: mpickering | Owner: Type: bug | Status: new Priority: normal | Milestone: 8.0.1 Component: Compiler | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Other | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): -------------------------------------+------------------------------------- Comment (by simonpj): * I do agree about switching the order of provided and required constraints. Let's just do that for GHC 8.0. This isn't yet a widely- used feature, so lets' fix it asap. * We should definitely complain if the existentials are used by required constraints. That's a bug to fix. * I'm much less certain about Richard's proposed syntax. Not dead set against but we could get on with the first two while debating the third. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10928#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler