Template bugged?

[Patrick Kreft]

BCS schrieb:
> Reply to Patrick,
> 
....
> 
> I think that would also fail in C++. If not, than the difference is not 
> a template issue. The issue is that a class news an instance of it's 
> self for each instance of it's self. It's just hidden by the use of 
> template base classes
> 
> 

Hmm it's work well on MinGW.

#include <iostream>

using namespace std;

class windows {
public:
     void msgloop() {
         std::cout << "MsgLoop" << std::endl;
     }
};

template <class app, class subsystem = windows>
class application {
public:
     int execute() {
         _app->run();
         _subsystem->msgloop();
         return 0;
     }
public:
     subsystem * _subsystem;
     app * _app;
};

class HelloWorld : public application<HelloWorld> {
public:
     void run() {
         std::cout << "HelloWorld" << std::endl;
     }
};

int main() {
     HelloWorld app1;
     app1.execute();
     std::cin.get();
     return 0;
}