#14478: Abstract pattern synonyms (for hsig and hs-boot) -------------------------------------+------------------------------------- Reporter: ezyang | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.2.1 checker) | Resolution: | Keywords: backpack 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): We also need to know arity because, type system aside, we still need to know how many arguments the pattern synonym should be applied to in a pattern. Eg {{{ f (P x) vs f (P x y) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14478#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler