On 9/15/10 9:11 AM, Kevin Jardine wrote:
Hi Malcolm,In this case, I am counting on GHC's {-# LANGUAGE GeneralizedNewtypeDeriving #-} feature to derive the instances for the classes I am including in the deriving clause. So perhaps portability is not a big issue here in any case.
Yes, but GND is a feature that would not be terribly difficult to add to another compiler. That it is GHC-only today is only because other compilers have bigger fish to fry. Implementing TH, on the other hand, is a major undertaking and doesn't look like it will be reimplemented anytime soon.
-- Live well, ~wren _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
