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

[Roman Cheplyaka]

+1

* Niklas Hambüchen <mail at nh2.me> [2014-04-28 21:36:02+0100]
> 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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