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yap-6.3/Logtalk/examples/sicstus/red_circle1.lgt

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:- object(red_circle(Radius),
extends(circle(Radius, red))).
:- info([
author is 'Paulo Moura',
version is 1.0,
date is 2000/4/22,
comment is 'Parametric object for representing geometric red circles.',
parnames is ['Radius'],
source is 'Example adopted from the SICStus Objects documentation.']).
context :-
write(red_circle1), nl,
self(Self), write('self: '), writeq(Self), nl,
this(This), write('this: '), writeq(This), nl,
sender(Sender), write('sender: '), writeq(Sender), nl, nl,
^^context.
:- end_object.