#12006: Can't infer constraint of pattern synonyms -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 Resolution: | Keywords: | PatternSynonyms 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): Yes, I think in principle it should be possible to infer a type that works for both builder and matcher. I'm not quite sure how hard that would be; probably not terrible. Of course you can always work around the difficulty by providing a signature. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12006#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler