// 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/default_tagged.hpp | |
/// \brief Weak tagging | |
#ifndef BOOST_BIMAP_TAGS_SUPPORT_DEFAULT_TAGGED_HPP | |
#define BOOST_BIMAP_TAGS_SUPPORT_DEFAULT_TAGGED_HPP | |
#if defined(_MSC_VER) && (_MSC_VER>=1200) | |
#pragma once | |
#endif | |
#include <boost/config.hpp> | |
#include <boost/bimap/tags/tagged.hpp> | |
/** \struct boost::bimaps::tags::support::default_tagged | |
\brief Weak tagging metafunction | |
\code | |
template< class Type, class Tag > | |
struct default_tagged | |
{ | |
typedef {TaggedType} type; | |
}; | |
\endcode | |
If the type is not tagged, this metafunction returns a tagged type with the | |
default tag. If it is tagged, the returns the type unchanged. | |
See also tagged, overwrite_tagged. | |
**/ | |
#ifndef BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES | |
namespace boost { | |
namespace bimaps { | |
namespace tags { | |
namespace support { | |
// Default Tagging | |
// A metafunction that create a tagged type with a default tag value. | |
template< class Type, class DefaultTag > | |
struct default_tagged | |
{ | |
typedef tagged<Type,DefaultTag> type; | |
}; | |
template< class Type, class OldTag, class NewTag > | |
struct default_tagged< tagged< Type, OldTag >, NewTag > | |
{ | |
typedef tagged<Type,OldTag> type; | |
}; | |
} // namespace support | |
} // namespace tags | |
} // namespace bimaps | |
} // namespace boost | |
#endif // BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES | |
#endif // BOOST_BIMAP_TAGS_SUPPORT_DEFAULT_TAGGED_HPP | |