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Logtalk - Object oriented extension to Prolog
Release 2.29.3
Copyright (c) 1998-2007 Paulo Moura. All Rights Reserved.
% start by loading the loading the example:
| ?- logtalk_load(nondet(loader)).
...
% make a threaded call with a non-deterministic goal:
| ?- threaded_call(lists::member(X, [1,2,3])).
X = _G189
yes
% retrieve through backtracking all solutions for the non-deterministic goal:
| ?- threaded_exit(lists::member(X, [1,2,3])).
X = 1 ;
X = 2 ;
X = 3 ;
no
% make a threaded call by commiting to the first solution found:
| ?- threaded_once(lists::member(X, [1,2,3])).
% retrieve through backtracking the goal solution:
