Proposal: Add modify' to Control.Monad.State.Strict

[Johan Tibell]

+1


On Mon, Apr 28, 2014 at 10:36 PM, Niklas Hambüchen <mail at nh2.me> wrote:

> Code like
>
>    flip execState 0 (forever $ modify (+1))
>
> leaks memory as hell, and gets fixed by using
>
>   x <- get
>   put $! x + 1
>
> I propose the addition of modify' to Control.Monad.State.Strict.
>
> This seems useful for the strict state monad and is consistent with
> similar functions in base (such as modifyIORef').
>
> Discussion period: 2 weeks.
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