41 lines
1.0 KiB
C++
41 lines
1.0 KiB
C++
// Boost.Function library
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// Copyright Douglas Gregor 2002-2003. Use, modification and
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// distribution is subject to the Boost Software License, Version
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// 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 <boost/lambda/lambda.hpp>
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#include <boost/lambda/bind.hpp>
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#include <boost/core/lightweight_test.hpp>
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#include <iostream>
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#include <cstdlib>
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static unsigned
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func_impl(int arg1, bool arg2, double arg3)
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{
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using namespace std;
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return abs (static_cast<int>((arg2 ? arg1 : 2 * arg1) * arg3));
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}
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int main()
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{
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using boost::function;
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using namespace boost::lambda;
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function <unsigned(bool, double)> f1 = bind(func_impl, 15, _1, _2);
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BOOST_TEST_EQ( f1(true, 2.0), 30 );
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function <unsigned(double)> f2 = boost::lambda::bind(f1, false, _1);
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BOOST_TEST_EQ( f2(2.0), 60 );
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function <unsigned()> f3 = boost::lambda::bind(f2, 4.0);
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BOOST_TEST_EQ( f3(), 120 );
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return boost::report_errors();
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}
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