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Diffstat (limited to '3rdParty/Boost/src/boost/fusion/sequence/intrinsic/at_key.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/fusion/sequence/intrinsic/at_key.hpp | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/fusion/sequence/intrinsic/at_key.hpp b/3rdParty/Boost/src/boost/fusion/sequence/intrinsic/at_key.hpp new file mode 100644 index 0000000..24c2fff --- /dev/null +++ b/3rdParty/Boost/src/boost/fusion/sequence/intrinsic/at_key.hpp @@ -0,0 +1,93 @@ +/*============================================================================= + Copyright (c) 2001-2011 Joel de Guzman + Copyright (c) 2006 Dan Marsden + + 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) +==============================================================================*/ +#if !defined(BOOST_FUSION_AT_KEY_20060304_1755) +#define BOOST_FUSION_AT_KEY_20060304_1755 + +#include <boost/type_traits/is_const.hpp> +#include <boost/fusion/sequence/intrinsic_fwd.hpp> +#include <boost/fusion/algorithm/query/find.hpp> +#include <boost/fusion/iterator/deref_data.hpp> +#include <boost/fusion/support/tag_of.hpp> +#include <boost/fusion/support/detail/access.hpp> + +namespace boost { namespace fusion +{ + // Special tags: + struct sequence_facade_tag; + struct boost_array_tag; // boost::array tag + struct mpl_sequence_tag; // mpl sequence tag + struct std_pair_tag; // std::pair tag + + namespace extension + { + template <typename Tag> + struct at_key_impl + { + template <typename Seq, typename Key> + struct apply + { + typedef typename + result_of::deref_data< + typename result_of::find<Seq, Key>::type + >::type + type; + + static type + call(Seq& seq) + { + return fusion::deref_data(fusion::find<Key>(seq)); + } + }; + }; + + template <> + struct at_key_impl<sequence_facade_tag> + { + template <typename Sequence, typename Key> + struct apply : Sequence::template at_key_impl<Sequence, Key> {}; + }; + + template <> + struct at_key_impl<boost_array_tag>; + + template <> + struct at_key_impl<mpl_sequence_tag>; + + template <> + struct at_key_impl<std_pair_tag>; + } + + namespace result_of + { + template <typename Sequence, typename Key> + struct at_key + : extension::at_key_impl<typename detail::tag_of<Sequence>::type>:: + template apply<Sequence, Key> + {}; + } + + template <typename Key, typename Sequence> + inline typename + lazy_disable_if< + is_const<Sequence> + , result_of::at_key<Sequence, Key> + >::type + at_key(Sequence& seq) + { + return result_of::at_key<Sequence, Key>::call(seq); + } + + template <typename Key, typename Sequence> + inline typename result_of::at_key<Sequence const, Key>::type + at_key(Sequence const& seq) + { + return result_of::at_key<Sequence const, Key>::call(seq); + } +}} + +#endif |