#10653: PatternSynonyms should be imported/exported as part of the wildcard notation -------------------------------------+------------------------------------- Reporter: gridaphobe | Owner: Type: feature request | Status: new Priority: normal | Milestone: 7.12.1 Component: Compiler | Version: 7.11 Resolution: | Keywords: pattern Operating System: Unknown/Multiple | synonyms Type of failure: None/Unknown | Architecture: Blocked By: | Unknown/Multiple Related Tickets: | Test Case: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by gridaphobe): I would argue that `P` belongs to whatever type `Tree` constructs (but not `Maybe`), and that `Q` belongs to pairs. More generally, https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/syntax- extns.html#idp23521760 says that pattern synonyms have a type `C => t1 -> t2 -> ... -> t`; I would argue that a pattern synonym belongs to the outermost type constructor of `t`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10653#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler