Include Paulo Moura's Logtalk OO LP system

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@53 b08c6af1-5177-4d33-ba66-4b1c6b8b522a

Logtalk/examples/points/bounded_point.lgt

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+
+:- object(bounded_point,
+	imports(bounded_coordinate),
+	instantiates(class),
+	specializes(point)).
+
+
+	:- info([
+		version is 1.1,
+		date is 2000/10/31,
+		authors is 'Paulo Moura',
+		comment is 'Two dimensional point moving in a constrained area.',
+		source is 'Example adopted from the SICStus Objects documentation.']).
+
+
+	:- uses(list).
+
+
+	move(X, Y) :-
+		::check_bounds(x, X),
+		::check_bounds(y, Y),
+		^^move(X, Y).
+
+
+	print :-
+		::print_bounds(x),
+		::print_bounds(y),
+		^^print.
+
+
+	instance_base_name(bp).
+
+
+	default_init_option(bounds(x)-(-10, 10)).
+
+	default_init_option(bounds(y)-(-10, 10)).
+
+	default_init_option(Default) :-
+		^^default_init_option(Default).
+
+
+	process_init_option(bounds(Coordinate)-(Min, Max)) :-
+		::set_bounds(Coordinate, Min, Max).
+
+	process_init_option(Option) :-
+		^^process_init_option(Option).
+
+
+:- end_object.