[Haskell-cafe] proposal: point free case expressions

[Edward Kmett]

I seem to recall this proposal being included on the Haskell' proposals. Ah,
here it is:

http://hackage.haskell.org/trac/haskell-prime/ticket/41

-Edward Kmett

On Thu, Nov 5, 2009 at 10:09 AM, Sebastiaan Visser <sfvisser at cs.uu.nl>wrote:

> Hello all,
>
> Wouldn't it be nice if we could write point free case statements?
>
> I regularly find myself writing down something like this:
>
> > myFunc = anotherFunc $ \x -> case x of
> >                                Left err -> print err
> >                                Right msg -> putStrLn msg
>
> We could really use a case statement in which we skip the scrutinee and
> make `(case of {})' be syntactic sugar for `(\x -> case x of {})'.
>
> So we could write:
>
> > myFunc = anotherFunc $ case of
> >                          Left err -> print err
> >                          Right msg -> putStrLn msg
>
> A minor syntactical addition, a big win!
>
> Cheers,
>
> --
> Sebastiaan Visser
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