data-default WAS: [containers] Proposal: Change to the Data.Map Monoid

[John Meacham]

On Thu, May 29, 2014 at 9:44 AM, Bryan O'Sullivan <bos at serpentine.com> wrote:
> Yes, of course we should. The whole point of having typeclasses is that the
> instances should make sense for everyone. The bar for introducing both
> typeclasses and especially automatically derived instances is a whole lot
> higher than "works for me, sometimes".

I think a lot of early haskell programmers are very biased towards
type classes when higher order functions are a much better solution to
a given problem.


You can write automatic deriving code for user classes directly now:

 http://www.haskell.org/ghc/docs/7.4.1/html/users_guide/generic-programming.html

currently GHC only, but as soon as type families are solid It's
definitely something I'm putting into jhc.

    John

-- 
John Meacham - http://notanumber.net/