[Haskell-cafe] Re: MonadList?

Ashley Yakeley ashley at semantic.org
Tue Sep 19 22:36:49 EDT 2006

Michael Shulman wrote:

> This is because (ErrorT e []) inherits its
> instance of MonadPlus from Error, not from [].  (Is there a reason for
> this, or is it just assumed that this is the more frequently desired
> behavior?)

It's a flaw in MonadPlus, since it allows two different behaviours and 
really should be two different classes. See 

Ashley Yakeley

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