#12366: Use TypeOperators for pattern synonyms? -------------------------------------+------------------------------------- Reporter: dubiousjim | Owner: Type: feature request | Status: new Priority: low | Milestone: Component: Compiler | Version: 8.0.1 (Parser) | Resolution: | Keywords: 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 goldfire): Unfortunately, I don't think this is possible. The type-level namespace and the term-level namespace are organized differently: `|>` in a type is indeed like a capitalized word, but `|>` in a term is like a lowercase word. The problem is, as I understand it, that the parser needs to be able to know where the constructors/pattern synonyms are in a pattern. Is `C (|>)` binding the variable `|>` or are we matching against a nullary pattern synonym `|>`? It's impossible to tell. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12366#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler