12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970 |
- // 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)
- #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
|