| // Boost.Bimap |
| // |
| // Copyright (c) 2006-2007 Matias Capeletto |
| // |
| // 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) |
| |
| /// \file tags/support/apply_to_value_type.hpp |
| /// \brief Similar to mpl::apply but for tagged types. |
| |
| #ifndef BOOST_BIMAP_TAGS_SUPPORT_APPLY_TO_VALUE_TYPE_HPP |
| #define BOOST_BIMAP_TAGS_SUPPORT_APPLY_TO_VALUE_TYPE_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER>=1200) |
| #pragma once |
| #endif |
| |
| #include <boost/config.hpp> |
| |
| #include <boost/bimap/tags/tagged.hpp> |
| #include <boost/mpl/apply.hpp> |
| |
| /** \struct boost::bimaps::tags::support::apply_to_value_type |
| \brief Higger order metafunction similar to mpl::apply but for tagged types. |
| |
| \code |
| template< class Metafunction, class TaggedType > |
| struct apply_to_value_type |
| { |
| typedef tagged |
| < |
| Metafuntion< value_type_of< TaggedType >::type >::type, |
| tag_of< TaggedType >::type |
| |
| > type; |
| }; |
| \endcode |
| |
| This higher order metafunctions is very useful, and it can be used with lambda |
| expresions. |
| |
| See also tagged. |
| **/ |
| |
| #ifndef BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES |
| |
| namespace boost { |
| namespace bimaps { |
| namespace tags { |
| namespace support { |
| |
| template < class F, class TaggedType > |
| struct apply_to_value_type; |
| |
| template < class F, class ValueType, class Tag > |
| struct apply_to_value_type<F, tagged<ValueType,Tag> > |
| { |
| typedef BOOST_DEDUCED_TYPENAME mpl::apply< F, ValueType >::type new_value_type; |
| typedef tagged< new_value_type, Tag > type; |
| }; |
| |
| } // namespace support |
| } // namespace tags |
| } // namespace bimaps |
| } // namespace boost |
| |
| #endif // BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES |
| |
| #endif // BOOST_BIMAP_TAGS_SUPPORT_APPLY_TO_VALUE_TYPE_HPP |