| // 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 support/value_type_by.hpp |
| /// \brief Metafunction to access the value types (std::pair compatibles) of a bimap |
| |
| #ifndef BOOST_BIMAP_SUPPORT_VALUE_TYPE_BY_HPP |
| #define BOOST_BIMAP_SUPPORT_VALUE_TYPE_BY_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER>=1200) |
| #pragma once |
| #endif |
| |
| #include <boost/config.hpp> |
| |
| #include <boost/bimap/relation/detail/metadata_access_builder.hpp> |
| |
| /** \struct boost::bimaps::support::value_type_by |
| |
| \brief Metafunction to obtain the value type of a bimap indexed by one of the sides. |
| |
| The tag parameter can be either a user defined tag or \c member_at::{side}. |
| The returned type is signature-compatible with std::pair. |
| |
| \code |
| |
| template< class Tag, class Bimap > |
| struct value_type_by |
| { |
| typedef typename Bimap::{side}_value_type type; |
| }; |
| |
| \endcode |
| |
| See also member_at. |
| \ingroup bimap_group |
| **/ |
| |
| namespace boost { |
| namespace bimaps { |
| namespace support { |
| |
| // Implementation of value type by metafunction |
| |
| BOOST_BIMAP_SYMMETRIC_METADATA_ACCESS_BUILDER |
| ( |
| value_type_by, |
| left_value_type, |
| right_value_type |
| ) |
| |
| |
| |
| } // namespace support |
| } // namespace bimaps |
| } // namespace boost |
| |
| |
| #endif // BOOST_BIMAP_SUPPORT_VALUE_TYPE_BY_HPP |
| |