xor operator?

[Greg]

In article <slrn97cuta.eti.quinn at groat.ugcs.caltech.edu>,
  quinn at groat.ugcs.caltech.edu (Quinn Dunkan) wrote:
> On Mon, 29 Jan 2001 13:02:30 +0100, jurgen.defurne at philips.com
> <jurgen.defurne at philips.com> wrote:
> >I have indeed never met a language which had a boolean XOR (but some
> >have a binary XOR).
>
> if true xor false then
>    std_output.put_string("eiffel does!%N");
> end; -- and we can't use the std abbreviations, either, Just Because!
>
> Not that I've ever actually used it or anything.  We only need one
kind of
> loop, because that's "minimal", but hey, pile on the random boolean
operators!
>
> :)
>

LOL! I grepped through SmallEiffel's standard library and found one
place where the boolean xor was used: in part of a contract.

Greg
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