ceph/src/boost/libs/signals/example/print_sum_product.cpp

   1 // Boost.Signals library
   2
   3 // Copyright Douglas Gregor 2001-2003. Use, modification and
   4 // distribution is subject to the Boost Software License, Version
   5 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt)
   7
   8 // For more information, see http://www.boost.org
   9
  10 #include <iostream>
  11 #include <boost/signals/signal2.hpp>
  12
  13 struct print_sum {
  14   void operator()(int x, int y) const { std::cout << x+y << std::endl; }
  15 };
  16
  17 struct print_product {
  18   void operator()(int x, int y) const { std::cout << x*y << std::endl; }
  19 };
  20
  21
  22 int main()
  23 {
  24   boost::signal2<void, int, int> sig;
  25
  26   sig.connect(print_sum());
  27   sig.connect(print_product());
  28
  29   sig(3, 5); // prints 8 and 15
  30
  31   return 0;
  32 }