65 lines
896 B
Plaintext
65 lines
896 B
Plaintext
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:- object(misspell).
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% misspelt call to Prolog built-in predicate
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output(A) :-
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writr(A).
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:- end_object.
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% singleton variables in opening object directive
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:- object(singletons(L)).
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% singleton variables in predicate clause
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predicate(A) :-
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write(C).
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:- end_object.
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:- object(plredef).
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% redefinition of a Prolog built-in predicate
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write(_).
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:- end_object.
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:- object(lgtredef).
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% redefinition of Logtalk built-in predicate
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current_object(_).
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:- end_object.
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% references to unknown entities in object opening directive
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:- object(unknownrefs,
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implements(protocol),
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imports(category),
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extends(object)).
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:- end_object.
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:- object(portability).
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:- public(predicate/0).
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% clause with calls to non-ISO Prolog standard predicates
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predicate :-
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compare(Result, first, second),
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retractall(result(Result, _)),
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sort([], []),
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consult(file).
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:- end_object.
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