[Haskell-cafe] Applicative but not Monad

[Yusaku Hashimoto]

> Some parsers are not monads, allowing for optimizations.

Could you elaborate on them or give me some pointers? I think I heard
about it two or three times, but I couldn't find any resource of them.

-~nwn

On Sat, Oct 31, 2009 at 5:35 AM, Martijn van Steenbergen
<martijn at van.steenbergen.nl> wrote:
> Yusaku Hashimoto wrote:
>>
>> Hello cafe,
>> Do you know any data-type which is Applicative but not Monad?
>
> The Except datatype defined in the Applicative paper.
>
> Some parsers are not monads, allowing for optimizations.
>
> Martijn.
>
>