#13115: missing data instances for IntPtr and WordPtr in base -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: newcomer 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 sighingnow): Replying to [comment:3 RyanGlScott]:
Ah, OK. Thanks for clarifying!
I don't think this would be too hard to accomplish, if someone wants to volunteer a patch.
Hi, I am a newcomer to ghc-devs mailing list and I volunteer to fix this issue. Since base-4.10.0.0, the `IntPtr` and `WordPtr` are defined using `newtype` rather than `data` (as in base-4.9.1.0), is it enough for this issue that putting the following instance declarations to `Data.Data` module (with `GeneralizedNewtypeDeriving` enabled) ? {{{#!haskell deriving instance Data IntPtr deriving instance Data WordPtr }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13115#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler