1 // Copyright David Abrahams, Daniel Wallin 2003.
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 #ifndef BOOST_PARAMETER_AUX_PACK_IS_NAMED_ARGUMENT_HPP
7 #define BOOST_PARAMETER_AUX_PACK_IS_NAMED_ARGUMENT_HPP
8 
9 #include <boost/parameter/aux_/template_keyword.hpp>
10 #include <boost/parameter/aux_/is_tagged_argument.hpp>
11 #include <boost/parameter/config.hpp>
12 
13 #if defined(BOOST_PARAMETER_CAN_USE_MP11)
14 #include <boost/mp11/integral.hpp>
15 #include <boost/mp11/utility.hpp>
16 #else
17 #include <boost/mpl/bool.hpp>
18 #include <boost/mpl/if.hpp>
19 #endif
20 
21 namespace boost { namespace parameter { namespace aux {
22 
23     template <typename T>
24 #if defined(BOOST_PARAMETER_CAN_USE_MP11)
25     using is_named_argument = ::boost::mp11::mp_if<
26         ::boost::parameter::aux::is_template_keyword<T>
27       , ::boost::mp11::mp_true
28       , ::boost::parameter::aux::is_tagged_argument_mp11<T>
29     >;
30 #else
31     struct is_named_argument
32       : ::boost::mpl::if_<
33             ::boost::parameter::aux::is_template_keyword<T>
34           , ::boost::mpl::true_
35           , ::boost::parameter::aux::is_tagged_argument<T>
36         >::type
37     {
38     };
39 #endif
40 }}} // namespace boost::parameter::aux
41 
42 #endif  // include guard
43 
44