Logtalk 2.20.0 files.

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1114 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2004-08-16 16:41:11 +00:00
parent 1781ff9420
commit f5e660b9a3
156 changed files with 1886 additions and 438 deletions
--- a/Logtalk/examples/NOTES
+++ b/Logtalk/examples/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/birds/NOTES
+++ b/Logtalk/examples/birds/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/birds/SCRIPT
+++ b/Logtalk/examples/birds/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/bricks/NOTES
+++ b/Logtalk/examples/bricks/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/bricks/SCRIPT
+++ b/Logtalk/examples/bricks/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/classvars/NOTES
+++ b/Logtalk/examples/classvars/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/classvars/SCRIPT
+++ b/Logtalk/examples/classvars/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/dcgs/NOTES
+++ b/Logtalk/examples/dcgs/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/dcgs/SCRIPT
+++ b/Logtalk/examples/dcgs/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/dynpred/NOTES
+++ b/Logtalk/examples/dynpred/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/dynpred/SCRIPT
+++ b/Logtalk/examples/dynpred/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/errors/NOTES
+++ b/Logtalk/examples/errors/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/inheritance/NOTES
+++ b/Logtalk/examples/inheritance/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/inheritance/SCRIPT
+++ b/Logtalk/examples/inheritance/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/instmethods/NOTES
+++ b/Logtalk/examples/instmethods/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/instmethods/SCRIPT
+++ b/Logtalk/examples/instmethods/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lo/NOTES
+++ b/Logtalk/examples/lo/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lo/planner/NOTES
+++ b/Logtalk/examples/lo/planner/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lo/planner/SCRIPT
+++ b/Logtalk/examples/lo/planner/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lo/travellers/NOTES
+++ b/Logtalk/examples/lo/travellers/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lo/travellers/SCRIPT
+++ b/Logtalk/examples/lo/travellers/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/logic/NOTES
+++ b/Logtalk/examples/logic/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/logic/SCRIPT
+++ b/Logtalk/examples/logic/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lpa/NOTES
+++ b/Logtalk/examples/lpa/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lpa/SCRIPT
+++ b/Logtalk/examples/lpa/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/metainterpreters/NOTES
+++ b/Logtalk/examples/metainterpreters/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/metainterpreters/SCRIPT
+++ b/Logtalk/examples/metainterpreters/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/metapredicates/NOTES
+++ b/Logtalk/examples/metapredicates/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/metapredicates/SCRIPT
+++ b/Logtalk/examples/metapredicates/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/mi/NOTES
+++ b/Logtalk/examples/mi/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/mi/SCRIPT
+++ b/Logtalk/examples/mi/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/miscellaneous/NOTES
+++ b/Logtalk/examples/miscellaneous/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/miscellaneous/SCRIPT
+++ b/Logtalk/examples/miscellaneous/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/msglog/NOTES
+++ b/Logtalk/examples/msglog/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/msglog/SCRIPT
+++ b/Logtalk/examples/msglog/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/operators/NOTES
+++ b/Logtalk/examples/operators/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/operators/SCRIPT
+++ b/Logtalk/examples/operators/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/parametric/NOTES
+++ b/Logtalk/examples/parametric/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/parametric/SCRIPT
+++ b/Logtalk/examples/parametric/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/points/NOTES
+++ b/Logtalk/examples/points/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/points/SCRIPT
+++ b/Logtalk/examples/points/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/points/bounded_point.lgt
+++ b/Logtalk/examples/points/bounded_point.lgt
@@ -13,9 +13,6 @@
 		source is 'Example adopted from the SICStus Objects documentation.']).


-	:- uses(list).
-
-
 	move(X, Y) :-
 		::check_bounds(x, X),
 		::check_bounds(y, Y),
--- a/Logtalk/examples/polygons/NOTES
+++ b/Logtalk/examples/polygons/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/polygons/SCRIPT
+++ b/Logtalk/examples/polygons/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/polygons/concentric.lgt
+++ b/Logtalk/examples/polygons/concentric.lgt
@@ -4,13 +4,14 @@


 	:- info([
-		version is 1.0,
-		date is 1998/3/23,
+		version is 1.1,
+		date is 2004/8/15,
 		author is 'Paulo Moura',
 		comment is 'Concentric polygons as a constrained binary relation.']).


-	:- uses(list).
+	:- uses(list,
+		[member/2, select/3]).


 	descriptor_([x1, x2]).
@@ -33,7 +34,7 @@

 	add_tuple([Polygon| Polygons]) :-
 		Polygon::position(X, Y),
-		forall(list::member(Polygon2, Polygons), {Polygon2::move(X, Y)}),
+		forall(member(Polygon2, Polygons), {Polygon2::move(X, Y)}),
 		^^add_tuple([Polygon| Polygons]).


@@ -45,24 +46,24 @@


 	propagate(after, move(X, Y), Polygon, _, Tuple) :-
-		list::select(Polygon, Tuple, Polygons),
+		select(Polygon, Tuple, Polygons),
 		!,
 		forall(
-			(list::member(Polygon2, Polygons),\+ Polygon2::position(X, Y)),
+			(member(Polygon2, Polygons),\+ Polygon2::position(X, Y)),
 			{Polygon2::move(X, Y)}).

 	propagate(after, transX(X), Polygon, _, Tuple) :-
-		list::select(Polygon, Tuple, Polygons),
+		select(Polygon, Tuple, Polygons),
 		!,
 		forall(
-			(list::member(Polygon2, Polygons), \+ Polygon2::position(X, _)),
+			(member(Polygon2, Polygons), \+ Polygon2::position(X, _)),
 			{Polygon2::transX(X)}).

 	propagate(after, transY(Y), Polygon, _, Tuple) :-
-		list::select(Polygon, Tuple, Polygons),
+		select(Polygon, Tuple, Polygons),
 		!,
 		forall(
-			(list::member(Polygon2, Polygons), \+ Polygon2::position(_, Y)),
+			(member(Polygon2, Polygons), \+ Polygon2::position(_, Y)),
 			{Polygon2::transY(Y)}).


--- a/Logtalk/examples/polygons/polygon.lgt
+++ b/Logtalk/examples/polygons/polygon.lgt
@@ -11,9 +11,6 @@
 		comment is 'Polygon predicates.']).


-	:- uses(list).
-
-
 	:- public(move/2).
 	:- mode(move(+integer, +integer), one).

--- a/Logtalk/examples/profiling/NOTES
+++ b/Logtalk/examples/profiling/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/profiling/SCRIPT
+++ b/Logtalk/examples/profiling/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/profiling/timer.lgt
+++ b/Logtalk/examples/profiling/timer.lgt
@@ -3,14 +3,14 @@


 	:- info([
-		version is 1.1,
+		version is 1.2,
 		author is 'Paulo Moura',
-		date is 2004/6/30,
+		date is 2004/8/15,
 		comment is 'Call executing time profiler.']).


-	:- uses(time).
-	:- uses(loop).
+	:- uses(time, [cpu_time/1]).
+	:- uses(loop, [forto/3]).


 	:- public(timer/2).
@@ -34,19 +34,19 @@


 	timer(Call, Time) :-
-		time::cpu_time(Start),
+		cpu_time(Start),
 		(call(Call) -> true; true),
-		time::cpu_time(End),
+		cpu_time(End),
 		Time is End - Start.


 	timer(Call, Times, Time) :-
-		time::cpu_time(Start),
-		loop::forto(1, Times, Call),
-		time::cpu_time(End),
-		time::cpu_time(Start2),
-		loop::forto(1, 0, true),
-		time::cpu_time(End2),
+		cpu_time(Start),
+		forto(1, Times, Call),
+		cpu_time(End),
+		cpu_time(Start2),
+		forto(1, 0, true),
+		cpu_time(End2),
 		Overhead is End2 - Start2,
 		Time is (End - Start - Overhead) / Times.

--- a/Logtalk/examples/puzzles/NOTES
+++ b/Logtalk/examples/puzzles/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/puzzles/SCRIPT
+++ b/Logtalk/examples/puzzles/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/puzzles/potions.lgt
+++ b/Logtalk/examples/puzzles/potions.lgt
@@ -9,12 +9,12 @@ http://www.csci.csusb.edu/dick/cs320/prolog/Potions.htm


 	:- info([
-		version is 1.0,
-		date is 2004/4/29,
+		version is 1.1,
+		date is 2004/8/15,
 		author is 'Paulo Moura',
 		comment is 'Harry Potter potions logical puzzle.']).

-	:- uses(list).
+	:- uses(list, [select/3]).

 	:- public(potions/7).
 	:- mode(potions(?atom, ?atom, ?atom, ?atom, ?atom, ?atom, ?atom), zero_or_one).
@@ -27,17 +27,17 @@ http://www.csci.csusb.edu/dick/cs320/prolog/Potions.htm

 	potions(P1, P2, P3, P4, P5, P6, P7) :-
 		contents(H1),
-		list::select(P1, H1, H2),
-		list::select(P7, H2, H3),
+		select(P1, H1, H2),
+		select(P7, H2, H3),
 		P1 \= P7, P1 \= forward, P7 \= forward,					% second clue
-		list::select(P2, H3, H4),
+		select(P2, H3, H4),
 		P2 \= poison,
-		list::select(P3, H4, H5),
+		select(P3, H4, H5),
 		P3 \= poison,											% third clue
 		P2 = P6,
-		list::select(P6, H5, H6),								% fourth clue
-		list::select(P4, H6, H7),
-		list::select(P5, H7, []),
+		select(P6, H5, H6),										% fourth clue
+		select(P4, H6, H7),
+		select(P5, H7, []),
 		two_pairs_poison_wine([P1, P2, P3, P4, P5, P6, P7]).	% first clue
 	

--- a/Logtalk/examples/reflection/NOTES
+++ b/Logtalk/examples/reflection/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/reflection/SCRIPT
+++ b/Logtalk/examples/reflection/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/relations/NOTES
+++ b/Logtalk/examples/relations/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/relations/SCRIPT
+++ b/Logtalk/examples/relations/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/relations/constrained_relation.lgt
+++ b/Logtalk/examples/relations/constrained_relation.lgt
@@ -5,13 +5,14 @@


 	:- info([
-		version is 3,
-		date is 2000/7/24,
+		version is 3.1,
+		date is 2004/8/15,
 		author is 'Paulo Moura',
 		comment is 'Enables the representation of relations with constraints on the state of participating objects.']).


-	:- uses(list).
+	:- uses(list,
+		[member/2, memberchk/2, subtract/3]).


 	:- private(activ_points_/3).
@@ -106,7 +107,7 @@

 	del_object_monitors(Object, Role) :-
 		::plays_roles(Object, Roles) ->
-			(list::member(Role, Roles) ->
+			(member(Role, Roles) ->
 				true
 				;
 				del_object_monitors(Object, Role, Roles))
@@ -145,7 +146,7 @@

 	activ_point(Role, Event, Message) :-
 		::activ_points_(Role, Event, Messages),
-		list::member(Message, Messages).
+		member(Message, Messages).


 	activ_points(Role, Event, List) :-
@@ -160,7 +161,7 @@

 	set_activ_points(Role, Event, List) :-
 		::descriptor(Descriptor),
-		list::memberchk(Role, Descriptor),
+		memberchk(Role, Descriptor),
 		::retractall(activ_points_(Role, Event, _)),
 		::assertz(activ_points_(Role, Event, List)).

@@ -174,7 +175,7 @@

 	filter_messages([Role| Roles], Original, Event, Messages) :-
 		::activ_points_(Role, Event, Excluded),
-		list::subtract(Original, Excluded, Rest),
+		subtract(Original, Excluded, Rest),
 		filter_messages(Roles, Rest, Event, Messages).


@@ -196,13 +197,13 @@
 		::descriptor(Descriptor),
 		write('call activation points:'), nl,
 		findall(Messages,
-			(list::member(Role, Descriptor),
+			(member(Role, Descriptor),
             ::activ_points(Role, before, Messages)),
           CallList),
 		write('  '), writeq(CallList), nl,
 		write('exit activation points:'), nl,
 		findall(Messages,
-			(list::member(Role, Descriptor),
+			(member(Role, Descriptor),
 			 ::activ_points(Role, after, Messages)),
           ExitList),
 		write('  '), writeq(ExitList), nl.
--- a/Logtalk/examples/relations/relation.lgt
+++ b/Logtalk/examples/relations/relation.lgt
@@ -6,15 +6,16 @@


 	:- info([
-		version is 1.1,
-		date is 2004/5/9,
+		version is 1.2,
+		date is 2004/8/15,
 		author is 'Esteban Zimanyi, Paulo Moura',
 		comment is 'Enables the representation of relations between independent objects.']).


 	:- uses(before_event_registry).
 	:- uses(after_event_registry).
-	:- uses(list).
+	:- uses(list,
+		[length/2, member/2, memberchk/2, nth1/3, same_length/2]).


 	tuple(Tuple) :-
@@ -33,7 +34,7 @@

 	add_tuple(Tuple) :-
 		::descriptor(Descriptor),
-		\+ list::same_length(Tuple, Descriptor),
+		\+ same_length(Tuple, Descriptor),
 		self(Self),
 		sender(Sender),
 		throw(error(invalid_length, Self::add_tuple(Tuple), Sender)).
@@ -49,8 +50,8 @@

 	add_tuple(Tuple) :-
 		::descriptor(Descriptor),
-		list::nth1(Position, Tuple, Object),
-		list::nth1(Position, Descriptor, Role),
+		nth1(Position, Tuple, Object),
+		nth1(Position, Descriptor, Role),
 		::cardinality(Role, _, Maximum),
 		::plays_role_n_times(Object, Role, Number),
 		Maximum = Number,
@@ -60,8 +61,8 @@

 	add_tuple(Tuple) :-
 		::descriptor(Descriptor),
-		list::nth1(Position, Tuple, Object),
-		list::nth1(Position, Descriptor, Role),
+		nth1(Position, Tuple, Object),
+		nth1(Position, Descriptor, Role),
 		::domain(Role, Domain),
 		(Domain::strict_instance ->
 			\+ Domain::valid(Object)
@@ -79,7 +80,7 @@
 	make_tuple_template([], [], _, []).

 	make_tuple_template([Object| Objects], [Role| Roles], Key, [Var| Rest]) :-
-		(list::member(Role, Key) ->
+		(member(Role, Key) ->
 			Var = Object
 			;
 			true),
@@ -94,8 +95,8 @@

 	remove_tuple(Tuple) :-
 		::descriptor(Descriptor),
-		list::nth1(Position, Tuple, Object),
-		list::nth1(Position, Descriptor, Role),
+		nth1(Position, Tuple, Object),
+		nth1(Position, Descriptor, Role),
 		::cardinality(Role, Minimum, _),
 		::plays_role_n_times(Object, Role, Number),
 		Minimum = Number,
@@ -115,34 +116,34 @@

 	number_of_tuples(Number) :-
 		findall(1, ::tuple_(_), List),
-		list::length(List, Number).
+		length(List, Number).


 	plays_roles(Object, Roles) :-
 		::descriptor(Descriptor),
 		setof(Role,
 			Tuple^Position^ (::tuple(Tuple),
-                           list::member(Object, Tuple),
-                           list::nth1(Position, Tuple, Object),
-                           once(list::nth1(Position, Descriptor, Role))),
+                           member(Object, Tuple),
+                           nth1(Position, Tuple, Object),
+                           once(nth1(Position, Descriptor, Role))),
         Roles).


 	plays_role_in_tuple(Object, Role, Tuple) :-
 		::descriptor(Descriptor),
 		::tuple(Tuple),
-		list::nth1(Position, Tuple, Object),
-		list::nth1(Position, Descriptor, Role).
+		nth1(Position, Tuple, Object),
+		nth1(Position, Descriptor, Role).


 	plays_role_n_times(Object, Role, Number) :-
 		::descriptor(Descriptor),
-		list::nth1(Position, Descriptor, Role),
+		nth1(Position, Descriptor, Role),
 		setof(Tuple,
 			(::tuple(Tuple),
-			 list::nth1(Position, Tuple, Object)), 
+			 nth1(Position, Tuple, Object)), 
 			Tuples),
-		list::length(Tuples, Number).
+		length(Tuples, Number).


 	domains(Domains) :-
@@ -193,7 +194,7 @@

 	degree(Degree) :-
 		::descriptor_(Descriptor),
-		list::length(Descriptor, Degree).
+		length(Descriptor, Degree).


 	set_descriptor(Descriptor) :-
@@ -258,8 +259,8 @@

 	valid_keys([Key| Keys], Descriptor) :-
 		forall(
-			list::member(Role, Key),
-			list::memberchk(Role, Descriptor)),
+			member(Role, Key),
+			memberchk(Role, Descriptor)),
 		valid_keys(Keys, Descriptor).


@@ -294,7 +295,7 @@

 	set_delete_options(Options) :-
 		::descriptor(Descriptor),
-		\+ list::same_length(Options, Descriptor),
+		\+ same_length(Options, Descriptor),
 		self(Self),
 		sender(Sender),
 		throw(error(invalid_length, Self::set_delete_options(Options), Sender)).
@@ -413,7 +414,7 @@

 	del_monitors([Object| Objects]) :-
 		((instantiates_class(Object, Class),
-		  \+ (::tuple(Other), list::member(Object, Other))) ->
+		  \+ (::tuple(Other), member(Object, Other))) ->
 			self(Self),
 			before_event_registry::del_monitors(Class, delete(Object, _), _, Self)
 			;
--- a/Logtalk/examples/roots/NOTES
+++ b/Logtalk/examples/roots/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/roots/SCRIPT
+++ b/Logtalk/examples/roots/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/searching/NOTES
+++ b/Logtalk/examples/searching/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/searching/SCRIPT
+++ b/Logtalk/examples/searching/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/searching/bridge.lgt
+++ b/Logtalk/examples/searching/bridge.lgt
@@ -3,9 +3,16 @@
 	instantiates(heuristic_state_space)).


-	:- uses(list).
-	:- uses(numberlist).
-	:- uses(set).
+	:- info([
+		version is 1.1,
+		author is 'Paulo Moura',
+		date is 2004/8/15,
+		comment is 'Bridge puzzle.']).
+
+
+	:- uses(list, [append/3]).
+	:- uses(numberlist, [min/2, max/2]).
+	:- uses(set, [insert/3, insert_all/3, select/3]).
 	

 	initial_state(start, ([], right, [1,3,6,8,12])).
@@ -15,32 +22,32 @@


 	next_state((Left1, left, Right1), (Left2, right, Right2), Slower) :-	% two persons
-		list::append(List, [Person1| Persons], Left1),
-		set::select(Person2, Persons, Others),
-		list::append(List, Others, Left2),
-		set::insert_all([Person1, Person2], Right1, Right2),
+		append(List, [Person1| Persons], Left1),
+		select(Person2, Persons, Others),
+		append(List, Others, Left2),
+		insert_all([Person1, Person2], Right1, Right2),
 		(Person1 > Person2 ->
 			Slower = Person1
 			;
 			Slower = Person2).

 	next_state((Left1, right, Right1), (Left2, left, Right2), Slower) :-	% two persons
-		list::append(List, [Person1| Persons], Right1),
-		set::select(Person2, Persons, Others),
-		list::append(List, Others, Right2),
-		set::insert_all([Person1, Person2], Left1, Left2),
+		append(List, [Person1| Persons], Right1),
+		select(Person2, Persons, Others),
+		append(List, Others, Right2),
+		insert_all([Person1, Person2], Left1, Left2),
 		(Person1 > Person2 ->
 			Slower = Person1
 			;
 			Slower = Person2).

 	next_state((Left1, left, Right1), (Left2, right, Right2), Person) :-	% one person
-		set::select(Person, Left1, Left2),
-		set::insert(Right1, Person, Right2).
+		select(Person, Left1, Left2),
+		insert(Right1, Person, Right2).
 		
 	next_state((Left1, right, Right1), (Left2, left, Right2), Person) :-	% one person
-		set::select(Person, Right1, Right2),
-		set::insert(Left1, Person, Left2).
+		select(Person, Right1, Right2),
+		insert(Left1, Person, Left2).


 	heuristic((Left, Lamp, Right), Heuristic) :-
--- a/Logtalk/examples/searching/eight_puzzle.lgt
+++ b/Logtalk/examples/searching/eight_puzzle.lgt
@@ -4,13 +4,13 @@


 	:- info([
-		version is 1.0,
+		version is 1.1,
 		author is 'Paulo Moura',
-		date is 1998/3/23,
+		date is 2004/8/15,
 		comment is 'Eight puzzle heuristic state space search problem.']).


-	:- uses(list).
+	:- uses(list, [member/2]).


 	initial_state(four_steps, [2/2,1/3,3/2,2/3,3/3,3/1,2/1,1/1,1/2]).
@@ -24,10 +24,10 @@


 	print_state([S0,S1,S2,S3,S4,S5,S6,S7,S8]) :-
-		list::member(Y, [3, 2, 1]),
+		member(Y, [3, 2, 1]),
 		nl,
-		list::member(X, [1, 2, 3]),
-		list::member(Tile-X/Y, [' '-S0,1-S1,2-S2,3-S3,4-S4,5-S5,6-S6,7-S7,8-S8]),
+		member(X, [1, 2, 3]),
+		member(Tile-X/Y, [' '-S0,1-S1,2-S2,3-S3,4-S4,5-S5,6-S6,7-S7,8-S8]),
 		write(Tile),
 		fail.

--- a/Logtalk/examples/searching/hill_climbing1.lgt
+++ b/Logtalk/examples/searching/hill_climbing1.lgt
@@ -4,21 +4,22 @@


 	:- info([
-		version is 1.0,
+		version is 1.1,
 		author is 'Paulo Moura',
-		date is 1998/3/23,
+		date is 2004/8/15,
 		comment is 'Hill climbing heuristic state space search strategy.',
 		parnames is ['Threshold']]).


-	:- uses(list).
+	:- uses(list,
+		[member/2, reverse/2, sort/2]).

 	:- private(hill/7).


 	search(Space, State, Threshold, Solution, Cost) :-
 		hill(Space, State, Threshold, [], Path, 0, Cost),
-		list::reverse(Path, Solution).
+		reverse(Path, Solution).


 	hill(Space, State, _, Path, [State| Path], Cost, Cost) :-
@@ -28,12 +29,12 @@
 		findall(
 			(Estimate, Cost, Next),
 			(Space::next_state(State, Next, Cost),
-             \+ list::member(Next, [State| Path]),
+             \+ member(Next, [State| Path]),
             Space::heuristic(Next, Guess),
             Estimate is Guess + Cost),
 			States),
-		list::sort(States, SortedStates),
-		list::member((_, Cost2, Next2), SortedStates),
+		sort(States, SortedStates),
+		member((_, Cost2, Next2), SortedStates),
 		SoFar2 is SoFar + Cost2,
 		SoFar2 =< Threshold,
 		hill(Space, Next2, Threshold, [State| Path], Solution, SoFar2, Total).
--- a/Logtalk/examples/searching/miss_cann.lgt
+++ b/Logtalk/examples/searching/miss_cann.lgt
@@ -10,7 +10,7 @@
 		comment is 'Missionaries and cannibals heuristic state space search problem.']).


-	:- uses(loop).
+	:- uses(loop, [forto/3]).


 	initial_state(start, ((3,3), left, (0,0))).
@@ -20,14 +20,14 @@


 	print_state(((Me,Ce), B, (Md,Cd))) :-
-		loop::forto(1, Me, write('M')),
-		loop::forto(1, Ce, write('C')),
+		forto(1, Me, write('M')),
+		forto(1, Ce, write('C')),
 		(B = left ->
 			write('.<__>..........')
 			;
 			write('..........<__>.')),
-		loop::forto(1, Md, write('M')),
-		loop::forto(1, Cd, write('C')),
+		forto(1, Md, write('M')),
+		forto(1, Cd, write('C')),
 		nl.


--- a/Logtalk/examples/searching/performance.lgt
+++ b/Logtalk/examples/searching/performance.lgt
@@ -4,18 +4,18 @@


 	:- info([
-		version is 1.0,
+		version is 1.1,
 		author is 'Paulo Moura',
-		date is 1998/3/23,
+		date is 2004/8/15,
 		comment is 'Performance monitor for state space searches.']).


 	:- uses(event_registry).
 	:- uses(before_event_registry).
 	:- uses(after_event_registry).
-	:- uses(list).
-	:- uses(numberlist).
-	:- uses(time).
+	:- uses(list, [length/2]).
+	:- uses(numberlist, [min/2, max/2, sum/2]).
+	:- uses(time, [cpu_time/1]).


 	:- private(transitions/3).
@@ -71,7 +71,7 @@

 	transitions(Number) :-
 		findall(N, ::transitions(_, _, N), List),
-		numberlist::sum(List, Number).
+		sum(List, Number).


 	time(Time) :-
@@ -85,12 +85,12 @@
 			Length, 
 			(::transitions(State1, _, _),
 			 findall(State2, ::transitions(State1, State2, _), States2),
-			 list::length(States2, Length)),
+			 length(States2, Length)),
 			Lengths),
-		list::min(Lengths, Minimum),
-		list::max(Lengths, Maximum),
-		numberlist::sum(Lengths, Sum),
-		list::length(Lengths, Length),
+		min(Lengths, Minimum),
+		max(Lengths, Maximum),
+		sum(Lengths, Sum),
+		length(Lengths, Length),
 		Average is Sum / Length.


@@ -114,13 +114,13 @@

 	before(_, solve(_, _, _), _) :-
 		!,
-		time::cpu_time(Time),
+		cpu_time(Time),
 		::retractall(start_time(_)),
 		::asserta(start_time(Time)).

 	before(_, solve(_, _, _, _), _) :-
 		!,
-		time::cpu_time(Time),
+		cpu_time(Time),
 		::retractall(start_time(_)),
 		::asserta(start_time(Time)).

@@ -145,19 +145,19 @@

 	after(_, solve(_, _, Solution), _) :-
 		!,
-		time::cpu_time(Time),
+		cpu_time(Time),
 		::retractall(end_time(_)),
 		::asserta(end_time(Time)),
-		list::length(Solution, Length),
+		length(Solution, Length),
 		::retractall(solution_length(_)),
 		::asserta(solution_length(Length)).

 	after(_, solve(_, _, Solution, _), _) :-
 		!,
-		time::cpu_time(Time),
+		cpu_time(Time),
 		::retractall(end_time(_)),
 		::asserta(end_time(Time)),
-		list::length(Solution, Length),
+		length(Solution, Length),
 		::retractall(solution_length(_)),
 		::asserta(solution_length(Length)).

--- a/Logtalk/examples/shapes/NOTES
+++ b/Logtalk/examples/shapes/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/shapes/ch/NOTES
+++ b/Logtalk/examples/shapes/ch/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/shapes/ch/SCRIPT
+++ b/Logtalk/examples/shapes/ch/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/shapes/ph/NOTES
+++ b/Logtalk/examples/shapes/ph/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/shapes/ph/SCRIPT
+++ b/Logtalk/examples/shapes/ph/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/sicstus/NOTES
+++ b/Logtalk/examples/sicstus/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/sicstus/SCRIPT
+++ b/Logtalk/examples/sicstus/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/symdiff/NOTES
+++ b/Logtalk/examples/symdiff/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/symdiff/SCRIPT
+++ b/Logtalk/examples/symdiff/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/viewpoints/NOTES
+++ b/Logtalk/examples/viewpoints/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/viewpoints/SCRIPT
+++ b/Logtalk/examples/viewpoints/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.19.1
+Release 2.20.0

 Copyright (c) 1998-2004 Paulo Moura.  All Rights Reserved.
 =================================================================