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+// This example illustrates how C++ classes can be used from D using SWIG.
+// The D class gets mapped onto the C++ class and behaves as if it is a D class.
+module runme;
+
+import tango.io.Stdout;
+import example;
+
+void main() {
+ // ----- Object creation -----
+
+ Stdout( "Creating some objects:" ).newline;
+
+ {
+ scope Square s = new Square(10);
+ scope Circle c = new Circle(10);
+
+ // ----- Access a static member -----
+ Stdout.format( "{} shapes were created.", Shape.nshapes ).newline;
+
+ // ----- Member data access -----
+
+ // Notice how we can do this using functions specific to
+ // the 'Circle' class.
+ c.x = 20;
+ c.y = 30;
+
+ // Now use the same functions in the base class
+ Shape shape = s;
+ shape.x = -10;
+ shape.y = 5;
+
+ Stdout( "\nHere is their current position:" ).newline;
+ Stdout.format( " Circle = ( {}, {} )", c.x, c.y ).newline;
+ Stdout.format( " Square = ( {}, {} )", s.x, s.y ).newline;
+
+ // ----- Call some methods -----
+
+ Stdout( "\nHere are some properties of the shapes:" ).newline;
+ Shape[] shapes = [ cast(Shape) c, cast(Shape) s ];
+ foreach ( currentShape; shapes )
+ {
+ Stdout.format( " {}", currentShape.classinfo.name ).newline;
+ Stdout.format( " area = {}", currentShape.area() ).newline;
+ Stdout.format( " perimeter = {}", currentShape.perimeter() ).newline;
+ }
+
+ // Notice how the area() and perimeter() functions really
+ // invoke the appropriate virtual method on each object.
+
+ // ----- Delete everything -----
+ Stdout( "\nGuess I'll clean up now:" ).newline;
+ // Note: when this using scope is exited the D destructors are called which
+ // in turn call the C++ destructors.
+ }
+
+ Stdout.format( "{} shapes remain", Shape.nshapes ).newline;
+ Stdout( "\nGoodbye!" ).newline;
+}