#10794: Extension request: "where" clauses in type signatures -------------------------------------+------------------------------------- Reporter: danso | Owner: Type: feature request | Status: new Priority: lowest | Milestone: Component: Compiler (Type | Version: 7.10.2 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by simonpj): You can today say {{{ fold :: (f ~ a -> a -> a) => f -> [a] -> [a] }}} which does the job reasonably. I doubt it's worth doing more. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10794#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler