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// Copyright Daniel Wallin 2006. 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)
#include <boost/parameter/keyword.hpp>
#include <boost/parameter/aux_/maybe.hpp>
#include <cassert>
namespace test {
BOOST_PARAMETER_KEYWORD(tag, kw)
BOOST_PARAMETER_KEYWORD(tag, unused)
template <class Args>
int f(Args const& args)
{
return args[kw | 1.f];
}
} // namespace test
int main()
{
using test::kw;
using test::unused;
using test::f;
using boost::parameter::aux::maybe;
assert(f((kw = 0, unused = 0)) == 0);
assert(f(unused = 0) == 1);
assert(f((kw = maybe<int>(), unused = 0)) == 1);
assert(f((kw = maybe<int>(2), unused = 0)) == 2);
return 0;
}
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