1 // Copyright Cromwell D. Enage 2018. 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_IS_ARGUMENT_PACK_HPP 7 #define BOOST_PARAMETER_IS_ARGUMENT_PACK_HPP 8 9 #include <boost/parameter/aux_/is_tagged_argument.hpp> 10 #include <boost/parameter/aux_/arg_list.hpp> 11 #include <boost/mpl/bool.hpp> 12 #include <boost/mpl/if.hpp> 13 #include <boost/type_traits/is_base_of.hpp> 14 15 namespace boost { namespace parameter { 16 17 template <typename T> 18 struct is_argument_pack 19 : ::boost::mpl::if_< 20 ::boost::is_base_of< ::boost::parameter::aux::empty_arg_list,T> 21 , ::boost::mpl::true_ 22 , ::boost::parameter::aux::is_tagged_argument<T> 23 >::type 24 { 25 }; 26 }} 27 28 #endif // include guard 29 30