1 // Copyright Daniel Wallin 2006. 2 // Distributed under the Boost Software License, Version 1.0. 3 // (See accompanying file LICENSE_1_0.txt or copy at 4 // http://www.boost.org/LICENSE_1_0.txt) 5 6 #include <boost/parameter/name.hpp> 7 8 namespace test { 9 10 BOOST_PARAMETER_NAME(kw) BOOST_PARAMETER_NAME(unused)11 BOOST_PARAMETER_NAME(unused) 12 13 template <typename Args> 14 int f(Args const& args) 15 { 16 return args[test::_kw | 1.f]; 17 } 18 } // namespace test 19 20 #include <boost/parameter/aux_/maybe.hpp> 21 #include <boost/core/lightweight_test.hpp> 22 main()23int main() 24 { 25 BOOST_TEST_EQ(0, test::f((test::_kw = 0, test::_unused = 0))); 26 BOOST_TEST_EQ(1, test::f(test::_unused = 0)); 27 BOOST_TEST_EQ( 28 1 29 , test::f(( 30 test::_kw = boost::parameter::aux::maybe<int>() 31 , test::_unused = 0 32 )) 33 ); 34 BOOST_TEST_EQ( 35 2 36 , test::f(( 37 test::_kw = boost::parameter::aux::maybe<int>(2) 38 , test::_unused = 0 39 )) 40 ); 41 return boost::report_errors(); 42 } 43 44