Pimpl with nested forward declaration

Object.cpp

#include "Object.h"

// Define Foo.
struct Object::Foo {
	int x;

	// Methods can live with data, no namespace required.
	void DoStuff() {

	}
};


Object::Object()
{
	_pimpl->DoStuff();
}

Object.h

class Object
{
public:
	Object();

private:
	// Explicit nested forward declaration required.
	struct Foo;

	// Standard pimpl ptr.
	Foo* _pimpl;
};