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Diffstat (limited to 'boost/bimap/support/value_type_by.hpp')
-rw-r--r-- | boost/bimap/support/value_type_by.hpp | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/boost/bimap/support/value_type_by.hpp b/boost/bimap/support/value_type_by.hpp new file mode 100644 index 0000000000..a7ce6c0e5d --- /dev/null +++ b/boost/bimap/support/value_type_by.hpp @@ -0,0 +1,65 @@ +// 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 + |