[Haskell-cafe] Re: [Haskell] Announce: generating free theorems, online and offline

Stefan O'Rear stefanor at cox.net
Thu Oct 18 10:17:11 EDT 2007

On Thu, Oct 18, 2007 at 03:36:01AM -0400, ajb at spamcop.net wrote:
> (As an aside: The H98 report still list the right-zero law as being
> a law for MonadPlus, even though most MonadPlus instances don't obey
> it.  That's actually a defect in the report.)

All the MonadPlus I can think of (IO,Maybe,[]) satisfy it.  Were you
thinking of right distribution?

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