Deriviable type classes

José Pedro Magalhães jpm at
Wed Feb 9 13:20:28 CET 2011


2011/2/9 Simon Peyton-Jones <simonpj at>

> Friends
> Just a heads-up.  Pedro is working on implementing "Generic Defaults", as
> described in his Haskell Symposium 2010 paper
> It will replace (and improve on) the "Derivable type classes" stuff in GHC
> at the moment, which was originally presented in a paper of that title that
> Ralf and I wrote in the 2000 Haskell workshop
> The "Derivable type class" extension is barely used, I believe, and isn't
> even documented in the manual.

Isn't it this?:

But anyway, I can't remember seeing any use of it.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <>

More information about the Glasgow-haskell-users mailing list