#9664: Add identity functor to base -------------------------------------+------------------------------------- Reporter: hvr | Owner: ekmett Type: task | Status: new Priority: normal | Milestone: 7.10.1 Component: Core Libraries | Version: Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Easy (less than 1 | Type of failure: hour) | None/Unknown Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- `base` already provides a `Const`ant functor, but the even more useful `Id`entity (or `Identity`) functor does not exist in `base` yet. This was already [https://groups.google.com/forum/#!msg/haskell-core- libraries/_nReDCbROew/Mdmf0zIloysJ proposed to the CLC back in early 2013], and already missed inclusion in GHC 7.8 However, in order to implement this, coordination with `transformers` is desirable, as `transformers` currently provides a non-transforming `Data.Functor.Identity`, and we'd like to avoid name clashes. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9664 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler