[Haskell-cafe] proposal: point free case expressions

[Sebastiaan Visser]

Yeah. I wanted to propose that as well, but I don't really know how  
well that scales to larger patterns.

On Nov 5, 2009, at 4:42 PM, Sjoerd Visscher wrote:
> Let's add point free pattern matching too then:
>
>> > myFunc = anotherFunc $ case of
>> >                          Left -> print
>> >                          Right -> putStrLn
>
> Sjoerd
>
> On Nov 5, 2009, at 4:09 PM, Sebastiaan Visser 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