-1 from me, adding things to base like this is a step backwards IMO. I don't see a problem with adding a generalize evaluate to primitive as well, however. We could also consider adding an evaluateST function somewhere in base, if that was desired (I've personally never needed it, but I could imagine it being useful).

On Wed Jan 07 2015 at 5:41:06 PM David Feuer <david.feuer@gmail.com> wrote:

Apparently, there was an issue with my last messages about this for some people, so here's the idea again:

We could generalize Control.Exception.evaluate to

evaluate :: PrimMonad m => a -> m a
evaluate a = primitive (\s -> seq# a s)

and then export it from Control.Monad.Primitive as well, which seems to me a much more natural place for it. The only challenge is that the PrimMonad class would need to be moved to base.

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