Data.Set.findMin is a partial function

[Jean-Philippe Bernardy]

On 12/11/06, Henning Thielemann <lemming at henning-thielemann.de> wrote:
>
> On Mon, 11 Dec 2006, Jean-Philippe Bernardy wrote:
>
> > You can try Data.Set.minView.
> > http://www.haskell.org/ghc/docs/latest/html/libraries/base/Data-Set.html
>
> Seems to be new in GHC-6.6 over GHC-6.4.

True, though "base 2.0" is more accurate, in light of the recent fuss
on the subject.

> I suspect that not really monadic behaviour is needed in minView, but only
> the fail method, isn't it? Confusing.

Indeed. This is standard style in many modules however. (And an
argument for the resurrection of MonadZero.)

Cheers,
JP.