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/roots/objectp.lgt

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+
+:- protocol(objectp).
+
+
+	:- info([
+		version is 1.0,
+		authors is 'Paulo Moura',
+		date is 2000/7/24,
+		comment is 'Default protocol for all objects.']).
+
+
+	:- public(strict_instance/0).
+
+	:- mode(strict_instance, zero_or_one).
+
+	:- info(strict_instance/0, [
+		comment is 'True if the object is strictly an instance.']).
+
+
+	:- public(print/0).
+
+	:- mode(print, one).
+
+	:- info(print/0, [
+		comment is 'Pretty prints an object description.']).
+
+
+	:- public(nil/0).
+
+	:- mode(nil, zero_or_one).
+
+	:- info(nil/0, [
+		comment is 'True if the object represents a void reference.']).
+
+
+:- end_protocol.