cc4531cd1e
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@53 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
39 lines
578 B
Plaintext
39 lines
578 B
Plaintext
|
|
:- object(abstract_class,
|
|
instantiates(class),
|
|
specializes(object)).
|
|
|
|
|
|
:- info([
|
|
authors is 'Paulo Moura',
|
|
version is 1.0,
|
|
date is 2000/4/22,
|
|
comment is 'Default metaclass for all abstract classes.']).
|
|
|
|
|
|
:- public(metaclass/0).
|
|
:- mode(metaclass, zero_or_one).
|
|
|
|
|
|
:- public(abstract_class/0).
|
|
:- mode(abstract_class, zero_or_one).
|
|
|
|
|
|
abstract_class :-
|
|
self(Self),
|
|
Self \= abstract_class.
|
|
|
|
|
|
metaclass :-
|
|
self(Self),
|
|
once((
|
|
instantiates_class(Class, Self),
|
|
Class::current_predicate(abstract_class/0))).
|
|
|
|
|
|
strict_instance :-
|
|
fail.
|
|
|
|
|
|
:- end_object.
|