Logtalk 2.15.0 release files.

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@757 b08c6af1-5177-4d33-ba66-4b1c6b8b522a

Logtalk/examples/shapes/ph/NOTES

@@ -0,0 +1,10 @@
+=================================================================
+Logtalk - Object oriented extension to Prolog
+Release 2.15.0
+
+Copyright (c) 1998-2003 Paulo Moura.  All Rights Reserved.
+=================================================================
+
+
+To load all objects in this example consult the ph.loader utility
+file (note that the *.loader files are Prolog files).

Logtalk/examples/shapes/ph/SCRIPT

@@ -0,0 +1,35 @@
+=================================================================
+Logtalk - Object oriented extension to Prolog
+Release 2.15.0
+
+Copyright (c) 1998-2003 Paulo Moura.  All Rights Reserved.
+=================================================================
+
+
+| ?- square::nsides(N).
+
+N = 4
+yes
+
+
+| ?- square::area(A).
+
+A = 1
+yes
+
+
+| ?- q1::(color(Color), side(Side), position(X, Y)).
+
+Color = red
+Side = 1
+X = 0
+Y = 0
+yes
+
+
+| ?- q2::(side(Side), area(Area), perimeter(Perimeter)).
+
+Side = 3
+Area = 9
+Perimeter = 12
+yes

Logtalk/examples/shapes/ph/ph.loader

@@ -0,0 +1,9 @@
+
+:- initialization(
+	logtalk_load([
+		shape,
+		polygon,
+		regular_polygon,
+		square,
+		q1,
+		q2])).

Logtalk/examples/shapes/ph/polygon.lgt

@@ -0,0 +1,51 @@
+:- object(polygon,
+    extends(shape)).
+
+
+	:- info([
+		author is 'Paulo Moura',
+		version is 1.0,
+		date is 2003/2/3,
+		comment is 'Generic polygon.']).
+
+
+	:- public(nsides/1).
+
+	:- mode(nsides(?integer), zero_or_one).
+
+	:- info(nsides/1, [
+		comment is 'Polygon number of sides.',
+		argnames is ['Number']]).
+
+
+	:- public(area/1).
+
+	:- mode(area(-float), zero_or_one).
+
+	:- info(area/1, [
+		comment is 'Polygon area.',
+		argnames is ['Area']]).
+
+
+	:- public(perimeter/1).
+
+	:- mode(perimeter(?atom), zero_or_one).
+
+	:- info(perimeter/1, [
+		comment is 'Polygon perimeter.',
+		argnames is ['Perimeter']]).
+
+
+	:- public(side/1).
+
+	:- mode(side(?atom), zero_or_one).
+
+	:- info(side/1, [
+		comment is 'Polygon side length.',
+		argnames is ['Length']]).
+
+
+	side(1).         % default side length
+
+
+:- end_object.

Logtalk/examples/shapes/ph/q1.lgt

@@ -0,0 +1,5 @@
+:- object(q1,
+    extends(square)).
+
+
+:- end_object.

Logtalk/examples/shapes/ph/q2.lgt

@@ -0,0 +1,14 @@
+:- object(q2,
+    extends(square)).
+
+
+	position(2, 3).
+
+
+	color(blue).
+
+
+	side(3).
+
+
+:- end_object.

Logtalk/examples/shapes/ph/regular_polygon.lgt

@@ -0,0 +1,18 @@
+:- object(regular_polygon,
+    extends(polygon)).
+
+
+	:- info([
+		author is 'Paulo Moura',
+		version is 1.0,
+		date is 2003/2/3,
+		comment is 'Generic regular polygon.']).
+
+
+	perimeter(Perimeter) :-
+		::nsides(Number),
+		::side(Side),
+		Perimeter is Number*Side.
+
+
+:- end_object.

Logtalk/examples/shapes/ph/shape.lgt

@@ -0,0 +1,35 @@
+:- object(shape).
+
+
+	:- info([
+		author is 'Paulo Moura',
+		version is 1.0,
+		date is 2003/2/3,
+		comment is 'Generic geometric shape.']).
+
+
+	:- public(color/1).
+
+	:- mode(color(?atom), zero_or_one).
+
+	:- info(color/1, [
+		comment is 'Shape color.',
+		argnames is ['Color']]).
+
+
+	:- public(position/2).
+
+	:- mode(position(?integer, ?integer), zero_or_one).
+
+	:- info(position/2, [
+		comment is 'Shape position.',
+		argnames is ['X', 'Y']]).
+
+
+	color(red).      % default shape color
+
+
+	position(0, 0).  % default shape position
+
+
+:- end_object.

Logtalk/examples/shapes/ph/square.lgt

@@ -0,0 +1,20 @@
+:- object(square,
+    extends(regular_polygon)).
+
+
+	:- info([
+		author is 'Paulo Moura',
+		version is 1.0,
+		date is 2003/2/3,
+		comment is 'Geometric square.']).
+
+
+	nsides(4).
+
+
+	area(Area) :-
+		::side(Side),
+		Area is Side*Side.
+
+
+:- end_object.