"Jewett, Jim J" <jim....@eds.com>:
> I personally like (and have used) Barry's suggestion of a new named> object(). Unfortunately, object() is longer to type, not as backwards> compatible, and places too emphasis on what the sentinel *is* rather> than what is *isn't*.
Perhaps there should be a built-in type called 'sentinel'
for people to create unique objects from?
The implementation could be very simple:
sentinel = object
:-)
Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury, | A citizen of NewZealandCorp, a |
Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. |
g...@cosc.canterbury.ac.nz +--------------------------------------+