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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_TAG_DEDUCED_HPP
- #define BOOST_PARAMETER_AUX_PACK_TAG_DEDUCED_HPP
- #include <boost/parameter/aux_/set.hpp>
- #include <boost/parameter/aux_/pack/tag_type.hpp>
- #include <boost/parameter/config.hpp>
- #if defined(BOOST_PARAMETER_CAN_USE_MP11)
- #include <boost/mp11/list.hpp>
- #include <boost/mp11/utility.hpp>
- #else
- #include <boost/mpl/pair.hpp>
- #include <boost/mpl/apply_wrap.hpp>
- #endif
- namespace boost { namespace parameter { namespace aux {
- // Tags a deduced argument Arg with the keyword tag of Spec using TagFn.
- // Returns the tagged argument and the mpl::set<> UsedArgs with the
- // tag of Spec inserted.
- template <typename UsedArgs, typename Spec, typename Arg, typename TagFn>
- struct tag_deduced
- {
- #if defined(BOOST_PARAMETER_CAN_USE_MP11)
- using type = ::boost::mp11::mp_list<
- ::boost::mp11::mp_apply_q<
- TagFn
- , ::boost::mp11::mp_list<
- typename ::boost::parameter::aux::tag_type<Spec>::type
- , Arg
- >
- >
- #else
- typedef ::boost::mpl::pair<
- typename ::boost::mpl::apply_wrap2<
- TagFn
- , typename ::boost::parameter::aux::tag_type<Spec>::type
- , Arg
- >::type
- #endif // BOOST_PARAMETER_CAN_USE_MP11
- , typename ::boost::parameter::aux::insert_<
- UsedArgs
- , typename ::boost::parameter::aux::tag_type<Spec>::type
- >::type
- #if defined(BOOST_PARAMETER_CAN_USE_MP11)
- >;
- #else
- > type;
- #endif
- };
- }}} // namespace boost::parameter::aux
- #endif // include guard
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