Re: Proposal: add ifM and whenM to Control.Monad

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Oliver Charles writes:

I'm +1 on whenM and unlessM - those I have wanted and think are very worthwhile. Regardless of the naming convention stuff (which I have never even been aware of in my day-to-day coding with Haskell), I think these are the right names, and they also match the naming with monad-loops (`whileM`, etc). I'd be -1 on mwhen, munless, etc.

I completely agree with Oliver. I've wanted "whenM" more times than I can count, but mwhen doesn't feel right. +1 for whenM/unlessM, -1 for the other proposals. John