[m-dev.] diff: map__is_empty

[Zoltan Somogyi]

On 28-Mar-2000, Peter Schachte <schachte at cs.mu.OZ.AU> wrote:
> The change looks fine to me.  Just one question:  out of curiosity, why
> 
> >  tree234__init(empty).
> > +
> > +tree234__is_empty(Tree) :-
> > +	Tree = empty.

To visually emphasize that a test is taking place.

Zoltan.
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