#11367: [Regression] Only one clause allowed in (explicitly bidirectional) 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: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Iceland_jack): Replying to [comment:10 mpickering]:
I think this reply is a mixture of a new ticket, #393 and some more context for this ticket.
Thanks mpickering, #393 looks promising. I have a keyboard macro for inserting `"undefined "`, if it got implemented I would use it aggressively: {{{
data X data Y f :: X → Y :t map f map f :: [X] -> [Y] }}}
looks great. Could [[ExplicitCallStack/ImplicitLocations]] be an alternative in #393 to `-fdefer-type-errors` + typed holes -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11367#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler