Re: [Haskell-beginners] Maybe, Either

On Sep 14, 2009, at 14:42 , Michael Snoyman wrote:

I understand that fail being in Monad is controversial, but my version of the function works in *all* monads. This is very

Not really; "fail" in non-MonadPlus-es is a rather poorly defined notion, and there are no guarantees that the result will be at all sane. "mzero" is well defined. -- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH