Re: [Haskell-cafe] ANNOUNCE: new bridge! (prelude-prime)

23 May 2013


      * Manuel Gómez  [2013-05-23 08:33:15-0430]
...
On Thu, May 23, 2013 at 3:07 AM, Roman Cheplyaka  wrote:
...
Pull requests are welcome, but let's stick to widely agreed changes
(like the Foldable/Traversable one). I think one of the reasons why
other Preludes haven't been adopted is because they were too radical.
* Andreas Abel  [2013-05-20 13:26:05+0200]
...
Maybe instead of fiddling with the current Prelude (which might break
backwards compatibility), we should design a new prelude which is not
automatically loaded but contains roughly the current prelude (with
the list functions generalized to collections) plus the "modern" type
class stack: Functor, Applicative, Monad, Foldable, Traversable,
Monoid etc.
Is this strategy adequate for attacking the issue of the type class
stack, though?  Defining, say, a new Monad class with the desired
Functor constraint wouldn’t be of much use, as everything else on
Hackage (and on the GHC libraries!) would still use the “real” Monad.
No, it definitely isn't.

Roman