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- // Copyright David Abrahams, Daniel Wallin 2003.
- // Distributed under 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)
- #ifndef BOOST_PARAMETER_AUX_PACK_MAKE_ITEMS_HPP
- #define BOOST_PARAMETER_AUX_PACK_MAKE_ITEMS_HPP
- #include <boost/parameter/aux_/void.hpp>
- #include <boost/parameter/aux_/pack/item.hpp>
- #include <boost/parameter/config.hpp>
- #if defined(BOOST_PARAMETER_CAN_USE_MP11)
- #include <boost/mp11/utility.hpp>
- #include <type_traits>
- #else
- #include <boost/mpl/eval_if.hpp>
- #include <boost/mpl/identity.hpp>
- #include <boost/type_traits/is_same.hpp>
- #endif
- namespace boost { namespace parameter { namespace aux {
- // Creates a item typelist.
- template <typename Spec, typename Arg, typename Tail>
- #if defined(BOOST_PARAMETER_CAN_USE_MP11)
- using make_items = ::boost::mp11::mp_if<
- ::std::is_same<Arg,::boost::parameter::void_>
- , ::boost::mp11::mp_identity< ::boost::parameter::void_>
- , ::boost::parameter::aux::make_item<Spec,Arg,Tail>
- >;
- #else
- struct make_items
- : ::boost::mpl::eval_if<
- ::boost::is_same<Arg,::boost::parameter::void_>
- , ::boost::mpl::identity< ::boost::parameter::void_>
- , ::boost::parameter::aux::make_item<Spec,Arg,Tail>
- >
- {
- };
- #endif
- }}} // namespace boost::parameter::aux
- #endif // include guard
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