Re: [boost] throw_exception rev. 44954 -> g++ warnings

3 May 2008

      Peter Dimov wrote:
...
Stefan Seefeld:
...
How do you prevent then any users deriving from your classes, from 
adding their own destructors ? Their destructors might not be invoked, 
since the base destructor isn't virtual.
How does this look in code?
#include <iostream>

struct Base
{
   ~Base() { std::cout << "~Base" << std::endl;}
};

struct Derived : Base
{
   ~Derived() { std::cout << "~Derived" << std::endl;}
};

void destruct(Base *b) { delete b;}

int main(int, char **)
{
   Derived *derived = new Derived;
   destruct(derived);
}

Run the above code as is, and with the base destructor made virtual, to 
see the difference.

Regards,
		Stefan

-- 

       ...ich hab' noch einen Koffer in Berlin...