Re: zero_type() & UNDEFINED and _typeof()

Hmm, I just came to realize a clear advantage with UNDEFINED wrt an existence operator: It makes it possible to combine the existence operation and the lookup.

It's a pity that it's equal to zero though. Compatibility aspects aside, it would be better if 0 != UNDEFINED (but both would still be false).

/ Martin Stjernholm, Roxen IS

Previous text:

2003-01-23 00:34: Subject: Re: zero_type() & UNDEFINED and _typeof()

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I said that UNDEFINED is useful considering the current situation when this kludge exists. The kludge itself is unfortunate, though, and UNDEFINED (and the other zero types) could be removed if a new existence operator is added.

/ Martin Stjernholm, Roxen IS