| 1 | // Boost.Function library |
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| 2 | |
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| 3 | // Copyright Douglas Gregor 2002-2003. Use, modification and |
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| 4 | // distribution is subject to the Boost Software License, Version |
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| 5 | // 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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| 6 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 7 | |
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| 8 | // For more information, see http://www.boost.org |
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| 9 | |
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| 10 | #include <boost/function.hpp> |
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| 11 | #include <boost/lambda/lambda.hpp> |
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| 12 | #include <boost/lambda/bind.hpp> |
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| 13 | #include <boost/core/lightweight_test.hpp> |
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| 14 | #include <iostream> |
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| 15 | #include <cstdlib> |
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| 16 | |
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| 17 | |
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| 18 | static unsigned |
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| 19 | func_impl(int arg1, bool arg2, double arg3) |
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| 20 | { |
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| 21 | using namespace std; |
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| 22 | return abs (x: static_cast<int>((arg2 ? arg1 : 2 * arg1) * arg3)); |
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| 23 | } |
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| 24 | |
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| 25 | int main() |
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| 26 | { |
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| 27 | using boost::function; |
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| 28 | using namespace boost::lambda; |
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| 29 | |
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| 30 | function <unsigned(bool, double)> f1 = bind(a1&: func_impl, a2: 15, a3: _1, a4: _2); |
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| 31 | BOOST_TEST_EQ( f1(true, 2.0), 30u ); |
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| 32 | |
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| 33 | function <unsigned(double)> f2 = boost::lambda::bind(a1: f1, a2: false, a3: _1); |
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| 34 | BOOST_TEST_EQ( f2(2.0), 60u ); |
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| 35 | |
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| 36 | function <unsigned()> f3 = boost::lambda::bind(a1: f2, a2: 4.0); |
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| 37 | BOOST_TEST_EQ( f3(), 120u ); |
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| 38 | |
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| 39 | return boost::report_errors(); |
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| 40 | } |
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| 41 | |
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