| // 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(BOOST_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(BOOST_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 |
| |