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Diffstat (limited to 'boost/parameter/aux_/pack/make_items.hpp')
-rw-r--r-- | boost/parameter/aux_/pack/make_items.hpp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/boost/parameter/aux_/pack/make_items.hpp b/boost/parameter/aux_/pack/make_items.hpp new file mode 100644 index 0000000000..ec1554bc64 --- /dev/null +++ b/boost/parameter/aux_/pack/make_items.hpp @@ -0,0 +1,45 @@ +// 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 + |