Fast C++ Delegate: Boost.Function 'drop-in' replacement and multicast

// FD.Delegate Library

// Copyright (C) 2001-2003 Douglas Gregor

// Use, modification and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

// For more information, see http://www.boost.org/

// Copyright (C) 2007 JaeWook Choi
// , modified from Boost.Function mem_fun_portable.cpp

#include <fd/delegate.hpp>
#include <iostream>
#include <functional>

struct X {
  int foo(int);
};
int X::foo(int x) { return -x; }

int main()
{
    fd::delegate2<int, X*, int> f;

f = &X::foo;

X x;
f(&x, 5);

    return 0;
}