On Sat, Sep 28, 2013 at 6:57 PM, Edward Kmett
As part of the discussion about Typeable, GHC 7.8 is going to include a Data.Type.Equality module that provides a polykinded type equality data type.
I'd like to propose that we rename this type to (==) rather than the (:=:) it was developed under.
We are already using (+), (-), (*), etc. at the type level in type-nats, so it would seem to fit the surrounding convention.
I've done the work of preparing a patch, visible here:
https://github.com/ekmett/packages-base/commit/fb47f8368ad3d40fdd79bdeec334c...
Thoughts?
Normally, I'd let this run the usual 2 week course, but we're getting down to the wire for 7.8's release. Once 7.8 ships, we'd basically be stuck with the current name forever.
Discussion Period: 1 week
-Edward Kmett
+1. For what it's worth, I suggested that name before, and Richard Eisenberg suggested that == should be for type-level Boolean equality: http://markmail.org/message/3yifytgt2k3cfwws. I'm not convinced, though -- this seems fundamental enough to deserve the simplest name possible. (I'm using that link because the haskell.org mailing list archive seems to be gone... Hopefully that comes back, eventually.) Shachaf