[Haskell-cafe] Please ignore :) {-# LANGUAGE DeriveApplicative #-}

[Pavel Perikov]

Please ignore the previous message :) Screwed :)

P.

Begin forwarded message:

> From: Pavel Perikov <perikov at gmail.com>
> Date: 6 мая 2010 г. 11:55:36 Московское летнее время
> To: haskell-cafe list Cafe mailing <haskell-cafe at haskell.org>
> Cc: Беркгаут Борис <boris.berkgaut at transas.com>
> Subject: {-# LANGUAGE DeriveApplicative #-} ?
> 
> Hi, list!.
> 
> Now in 6.12.1 we have DeriveFunctor, DeriveFoldable and DeriveTraversable. This greatly simplifies the "reuse structure" style of programming. Some structure (not just _data_ structure) got captured in ADT and can be reused for various purposes. 
> 
> Wouldn't it be nice to have the ability to derive Applicative as well? It shouldn't be more difficult than deriving Functor but will provide exciting possibilities. Just think about liftA2.
> 
> Please note that deriving Monad is quite different story and seem generally unfeasible.
> 
> Suggestions welcome.
> 
> P.
> 

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