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Stephen Tetley writes:

This just looks like a synthetic combinator to me (cue the arbitrary name). Naturally it can make some code shorter (that's the point of combinators) but I have reservations that the code is significantly clearer, more appealing.

It's just that I tend to write the following a LOT: x <- someMonadicFunction when x $ do ... I generally avoid using whenM because it seems silly to bring in a package dependency for something so trivial. With "om", it's the same thing: om when someMonadicFunction $ do ... I really didn't think it was that confusing or hard to read, but if people dislike it on principle, I have no other arguments besides utility. I find myself reaching for it a lot, so thought others might too. -- John Wiegley FP Complete Haskell tools, training and consulting http://fpcomplete.com johnw on #haskell/irc.freenode.net