A better type signature for `forM_`

Erik de Castro Lopo mle+hs at mega-nerd.com
Fri Apr 1 05:02:43 UTC 2016

David Feuer wrote:

> I think it's an interesting idea from a safety standpoint. Unfortunately,
> as Ed pointed out to me in a similar context, `void` isn't always free.

I would love to see an elaboration of that.

Erik de Castro Lopo

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