ceph/src/boost/libs/function/test/function_arith_portable.cpp

   1 // Function library
   2
   3 // Copyright (C) 2001-2003 Douglas Gregor
   4
   5 // Use, modification and distribution is subject to the Boost Software
   6 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt)
   8
   9 // For more information, see http://www.boost.org/
  10
  11
  12 #include <boost/function.hpp>
  13 #include <iostream>
  14
  15 float mul_ints(int x, int y) { return ((float)x) * y; }
  16 struct int_div {
  17   float operator()(int x, int y) const { return ((float)x)/y; };
  18 };
  19 int main()
  20 {
  21     boost::function2<float, int, int> f;
  22     f = int_div();
  23     std::cout << f(5, 3) << std::endl;
  24     if (f)
  25   std::cout << f(5, 3) << std::endl;
  26 else
  27   std::cout << "f has no target, so it is unsafe to call" << std::endl;
  28     f = 0;
  29     f = &mul_ints;
  30
  31     return 0;
  32 }