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+%module member_pointer
+
+%inline %{
+class Shape {
+public:
+ Shape() {
+ nshapes++;
+ }
+ virtual ~Shape() {
+ nshapes--;
+ };
+ double x, y;
+ double *z;
+
+ void move(double dx, double dy);
+ virtual double area(void) = 0;
+ virtual double perimeter(void) = 0;
+ static int nshapes;
+};
+
+class Circle : public Shape {
+private:
+ double radius;
+public:
+ Circle(double r) : radius(r) { };
+ virtual double area(void);
+ virtual double perimeter(void);
+};
+
+class Square : public Shape {
+private:
+ double width;
+public:
+ Square(double w) : width(w) { };
+ virtual double area(void);
+ virtual double perimeter(void);
+};
+
+extern double do_op(Shape *s, double (Shape::*m)(void));
+
+/* Functions that return member pointers */
+
+extern double (Shape::*areapt())(void);
+extern double (Shape::*perimeterpt())(void);
+
+/* Global variables that are member pointers */
+extern double (Shape::*areavar)(void);
+extern double (Shape::*perimetervar)(void);
+
+%}
+
+%{
+# define SWIG_M_PI 3.14159265358979323846
+
+/* Move the shape to a new location */
+void Shape::move(double dx, double dy) {
+ x += dx;
+ y += dy;
+}
+
+int Shape::nshapes = 0;
+
+double Circle::area(void) {
+ return SWIG_M_PI*radius*radius;
+}
+
+double Circle::perimeter(void) {
+ return 2*SWIG_M_PI*radius;
+}
+
+double Square::area(void) {
+ return width*width;
+}
+
+double Square::perimeter(void) {
+ return 4*width;
+}
+
+double do_op(Shape *s, double (Shape::*m)(void)) {
+ return (s->*m)();
+}
+
+double (Shape::*areapt())(void) {
+ return &Shape::area;
+}
+
+double (Shape::*perimeterpt())(void) {
+ return &Shape::perimeter;
+}
+
+/* Member pointer variables */
+double (Shape::*areavar)(void) = &Shape::area;
+double (Shape::*perimetervar)(void) = &Shape::perimeter;
+%}
+
+
+/* Some constants */
+%constant double (Shape::*AREAPT)(void) = &Shape::area;
+%constant double (Shape::*PERIMPT)(void) = &Shape::perimeter;
+%constant double (Shape::*NULLPT)(void) = 0;
+