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Diffstat (limited to 'boost/bimap/relation/support/is_tag_of_member_at.hpp')
| -rw-r--r-- | boost/bimap/relation/support/is_tag_of_member_at.hpp | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/boost/bimap/relation/support/is_tag_of_member_at.hpp b/boost/bimap/relation/support/is_tag_of_member_at.hpp new file mode 100644 index 0000000000..b2b1b7497b --- /dev/null +++ b/boost/bimap/relation/support/is_tag_of_member_at.hpp @@ -0,0 +1,181 @@ +// 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 relation/support/is_tag_of_member_at.hpp +/// \brief is_tag_of_member_at<tag,relation> metafunction + +#ifndef BOOST_BIMAP_RELATION_SUPPORT_IS_TAG_OF_MEMBER_AT_HPP +#define BOOST_BIMAP_RELATION_SUPPORT_IS_TAG_OF_MEMBER_AT_HPP + +#if defined(_MSC_VER) && (_MSC_VER>=1200) +#pragma once +#endif + +#include <boost/config.hpp> + +#include <boost/bimap/relation/member_at.hpp> +#include <boost/type_traits/is_same.hpp> + +#include <boost/mpl/bool.hpp> +#include <boost/utility/enable_if.hpp> +#include <boost/bimap/relation/support/member_with_tag.hpp> + +/** \struct boost::bimaps::relation::support::is_tag_of_member_at_left + +\brief Metafunction to test if a user tag is refering to the left member. + +\code + +template< class Tag, class Relation > +struct is_tag_of_member_at_left : {true_|false_} {}; + +\endcode + +This metafunction is somewhat redundant with member_with_tag, but it is included +because it is a lot easier to metaprogram with it. The result type is the +same that: + +\code + + is_same< member_with_tag<Tag,Relation>::type , member_at::left >::type + +\endcode + +See also member_with_tag, member_at, is_tag_of_member_at_right. +\ingroup relation_group + **/ + + +/** \struct boost::bimaps::relation::support::is_tag_of_member_at_right + +\brief Metafunction to test if a user tag is refering to the left member. + +\code + +template< class Tag, class Relation > +struct is_tag_of_member_at_right : {true_|false_} {}; + +\endcode + +This metafunction is somewhat redundat with member_with_tag, but it is included +because it is a lot easier to metaprogram with it. The result type is the +same that: + +\code + + is_same< member_with_tag<Tag,Relation>::type , member_at::right >::type + +\endcode + +See also member_with_tag, member_at, is_tag_of_member_at_left. +\ingroup relation_group + **/ + + +#ifndef BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES + +namespace boost { +namespace bimaps { +namespace relation { +namespace support { + +// Metafunction is_tag_of_member_at_left +// Easiear metaprogramming + +template +< + class Tag, + class Relation, + class Enable = void +> +struct is_tag_of_member_at_left : + ::boost::mpl::false_ {}; + +template< class Tag, class Relation > +struct is_tag_of_member_at_left +< + Tag, Relation, + BOOST_DEDUCED_TYPENAME enable_if + < + is_same + < + BOOST_DEDUCED_TYPENAME member_with_tag<Tag,Relation>::type, + member_at::left + > + + >::type +> : + ::boost::mpl::true_ {}; + +// Metafunction is_tag_of_member_at_right +// Easiear metaprogramming + +template +< + class Tag, + class Relation, + class Enable = void +> +struct is_tag_of_member_at_right : + ::boost::mpl::false_ {}; + +template< class Tag, class Relation > +struct is_tag_of_member_at_right +< + Tag, Relation, + BOOST_DEDUCED_TYPENAME enable_if + < + is_same + < + BOOST_DEDUCED_TYPENAME member_with_tag<Tag,Relation>::type, + member_at::right + > + + >::type +> : + ::boost::mpl::true_ {}; + + +// Metafunction is_tag_of_member_at_info +// Easiear metaprogramming + +template +< + class Tag, + class Relation, + class Enable = void +> +struct is_tag_of_member_at_info : + ::boost::mpl::false_ {}; + +template< class Tag, class Relation > +struct is_tag_of_member_at_info +< + Tag, Relation, + BOOST_DEDUCED_TYPENAME enable_if + < + is_same + < + BOOST_DEDUCED_TYPENAME member_with_tag<Tag,Relation>::type, + member_at::info + > + + >::type +> : + ::boost::mpl::true_ {}; + +} // namespace support +} // namespace relation +} // namespace bimaps +} // namespace boost + +#endif // BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES + +#endif // BOOST_BIMAP_RELATION_SUPPORT_IS_TAG_OF_MEMBER_AT_HPP + + |