Re: [Haskell-cafe] ANN: monad-bool 0.1

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John Wiegley writes:

And EitherT can already do that, it just lacks a convenience function to make it easier (i.e, not having to write lots of nested if statements).

Never mind, when/unless + left work just fine for this. -- John Wiegley FP Complete Haskell tools, training and consulting http://fpcomplete.com johnw on #haskell/irc.freenode.net