39 lines
578 B
Plaintext
39 lines
578 B
Plaintext
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:- object(abstract_class,
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instantiates(class),
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specializes(object)).
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:- info([
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authors is 'Paulo Moura',
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version is 1.0,
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date is 2000/4/22,
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comment is 'Default metaclass for all abstract classes.']).
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:- public(metaclass/0).
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:- mode(metaclass, zero_or_one).
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:- public(abstract_class/0).
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:- mode(abstract_class, zero_or_one).
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abstract_class :-
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self(Self),
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Self \= abstract_class.
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metaclass :-
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self(Self),
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once((
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instantiates_class(Class, Self),
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Class::current_predicate(abstract_class/0))).
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strict_instance :-
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fail.
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:- end_object.
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