The "Derivable type class" extension is barely used, I believe, and isn't even documented in the manual.
Isn't it this?: http://www.haskell.org/ghc/docs/latest/html/users_guide/generic-classes.html
Oh yes, silly me. It is documented!
Simon
From: José Pedro Magalhães [mailto:jpm@cs.uu.nl]
Sent: 09 February 2011 12:20
To: Simon Peyton-Jones
Cc: GHC users
Subject: Re: Deriviable type classes
Hi,
2011/2/9 Simon Peyton-Jones mailto:simonpj@microsoft.com>
Friends
Just a heads-up. Pedro is working on implementing "Generic Defaults", as described in his Haskell Symposium 2010 paper www.dreixel.net/research/pdf/gdmh_nocolor.pdfhttp://www.dreixel.net/research/pdf/gdmh_nocolor.pdf
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 http://research.microsoft.com/en-us/um/people/simonpj/papers/derive.htm.
The "Derivable type class" extension is barely used, I believe, and isn't even documented in the manual.
Isn't it this?: http://www.haskell.org/ghc/docs/latest/html/users_guide/generic-classes.html
But anyway, I can't remember seeing any use of it.
Cheers,
Pedro
