#ifndef SHAPE_H
#define SHAPE_H
#include <string>
#include <list>

// Some of our classnames are very common (like Exception).  So we'd better
// have a namespace
namespace Shapes {

// Exception class for this application.

class Exception {
public:
	Exception(const char* s = "" ) : msg(s){}
	Exception(std::string s = "" ) : msg(s){}
	std::string message () const { return msg; }
private:
	std::string msg;
};

// Dummy class to distinguish registration constructor from other constructors

struct Registration {
	Registration(std::string name) : name(name){}
	std::string name;
};

class ShapeRep;

// Envelope class

class Shape {
public:	
	Shape();
	Shape(const Shape& e) ;
	Shape& operator= (const Shape& e);
	Shape(ShapeRep& r);
	~Shape();
	ShapeRep* operator->();
private:
	ShapeRep* Rep;
};

std::list<Shape>& PrototypeList();


} // namespace

#endif