#13153: Several Traversable instances have an extra fmap -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: dfeuer Type: bug | Status: new Priority: normal | Milestone: 8.4.1 Component: Core Libraries | Version: 8.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by mpickering): I am very skeptical of adding all these special functions to type classes. Should we not improve the optimiser so that users can write normal idiomatic definitions without having to understand these intricacies? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13153#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler