#13058: Use coercions to implement fmapDefault and foldMapDefault -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: Type: task | Status: new Priority: normal | Milestone: 8.2.1 Component: Core Libraries | Version: 8.0.1 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 RyanGlScott): Sounds reasonable to me. We already have most of the machinery needed to do this, since `(#.)` is [http://git.haskell.org/ghc.git/blob/8d63ca981f689463655766c252160d3fec160264... already used in base], located within the internal `Data.Functor.Utils` module. David, would you care to add `(.#)` as well and refactor `fmapDefault` and `foldMapDefault` as you propose? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13058#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler