Re: Overloaded logic operators

Mike Austin <mike@mike-austin.com> writes:


> Torben Fgidius Mogensen wrote:


>> Option 2 is chosen by some scripting languages and "p and q" is
>> typically equivalent to "if p == null then p else q" and "p or q"
>> equivalent to "if p == null then q else p", so very similar to C's
>> sequential operators. [...] If you have an Object class (top of the
>> inheritance hierarchy), this might be used [as True].
>
> I like this idea of nil and Object. true needs false... now you've got two
> falsey values - and it's all downhill from there :)


If you let null be false and the non-null Object be true, you don't
need a separate boolean type.


> Do you know of languages which use this technique?


I can't offhand remember any specific instances.


Torben

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