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- // Function 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/
-
- #include <boost/function.hpp>
- #include <iostream>
- float mul_ints(int x, int y) { return ((float)x) * y; }
- struct int_div {
- float operator()(int x, int y) const { return ((float)x)/y; };
- };
- int main()
- {
- boost::function<float (int x, int y)> f;
- f = int_div();
- std::cout << f(5, 3) << std::endl;
- if (f)
- std::cout << f(5, 3) << std::endl;
- else
- std::cout << "f has no target, so it is unsafe to call" << std::endl;
- f = 0;
- f = &mul_ints;
-
- return 0;
- }
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