33 lines
790 B
C++
33 lines
790 B
C++
// Function library
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// Copyright (C) 2001-2003 Douglas Gregor
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// Use, modification and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// For more information, see http://www.boost.org/
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#include <boost/function.hpp>
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#include <iostream>
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float mul_ints(int x, int y) { return ((float)x) * y; }
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struct int_div {
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float operator()(int x, int y) const { return ((float)x)/y; };
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};
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int main()
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{
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boost::function2<float, int, int> f;
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f = int_div();
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std::cout << f(5, 3) << std::endl;
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if (f)
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std::cout << f(5, 3) << std::endl;
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else
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std::cout << "f has no target, so it is unsafe to call" << std::endl;
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f = 0;
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f = &mul_ints;
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return 0;
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}
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