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yap-6.3/Logtalk/examples/roots/objectp.lgt
2001-06-06 19:40:57 +00:00

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:- protocol(objectp).
:- info([
version is 1.0,
authors is 'Paulo Moura',
date is 2000/7/24,
comment is 'Default protocol for all objects.']).
:- public(strict_instance/0).
:- mode(strict_instance, zero_or_one).
:- info(strict_instance/0, [
comment is 'True if the object is strictly an instance.']).
:- public(print/0).
:- mode(print, one).
:- info(print/0, [
comment is 'Pretty prints an object description.']).
:- public(nil/0).
:- mode(nil, zero_or_one).
:- info(nil/0, [
comment is 'True if the object represents a void reference.']).
:- end_protocol.