Andrew Coppin wrote: > But here's a > question: what is the purpose of the MonadPlus class? It gives you a way of working with monads as monoids. Consider a Parsec example: metasyntactic = text "foo" `mplus` text "bar" `mplus` text "baz" You'll get back whichever one matched, in left-to-right-order, or mzero (a parse failure) if all of them fail. <b