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

+1. I've defined this practically every time I've used the strict state monad. -- Darius Jahandarie (Mobile)

On Apr 28, 2014, at 3:36 PM, Niklas Hambüchen 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').

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