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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_KEYWORD_ARG_REF_HPP
- #define BOOST_PARAMETER_AUX_PACK_TAG_KEYWORD_ARG_REF_HPP
- #include <boost/parameter/aux_/unwrap_cv_reference.hpp>
- #include <boost/parameter/aux_/tagged_argument.hpp>
- #include <boost/parameter/config.hpp>
- namespace boost { namespace parameter { namespace aux {
- template <
- typename Keyword
- , typename ActualArg
- #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
- , typename = typename ::boost::parameter::aux
- ::is_cv_reference_wrapper<ActualArg>::type
- #endif
- >
- struct tag_ref
- {
- typedef ::boost::parameter::aux::tagged_argument<
- Keyword
- , typename ::boost::parameter::aux
- ::unwrap_cv_reference<ActualArg>::type
- > type;
- };
- }}} // namespace boost::parameter::aux_
- #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
- #include <boost/mpl/bool.hpp>
- namespace boost { namespace parameter { namespace aux {
- template <typename Keyword, typename ActualArg>
- struct tag_ref<Keyword,ActualArg,::boost::mpl::false_>
- {
- typedef ::boost::parameter::aux
- ::tagged_argument<Keyword,ActualArg> type;
- };
- }}} // namespace boost::parameter::aux_
- #endif // Borland workarounds needed.
- namespace boost { namespace parameter { namespace aux {
- struct tag_keyword_arg_ref
- {
- template <typename K, typename T>
- struct apply
- {
- typedef typename ::boost::parameter::aux::tag_ref<K,T>::type type;
- };
- #if defined(BOOST_PARAMETER_CAN_USE_MP11)
- template <typename K, typename T>
- using fn = typename ::boost::parameter::aux::tag_ref<K,T>::type;
- #endif
- };
- }}} // namespace boost::parameter::aux
- #endif // include guard
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