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Diffstat (limited to 'src/third_party/boost-1.60.0/boost/fusion/container/list/detail/value_at_impl.hpp')
-rw-r--r-- | src/third_party/boost-1.60.0/boost/fusion/container/list/detail/value_at_impl.hpp | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/third_party/boost-1.60.0/boost/fusion/container/list/detail/value_at_impl.hpp b/src/third_party/boost-1.60.0/boost/fusion/container/list/detail/value_at_impl.hpp new file mode 100644 index 00000000000..8b288a12bdc --- /dev/null +++ b/src/third_party/boost-1.60.0/boost/fusion/container/list/detail/value_at_impl.hpp @@ -0,0 +1,43 @@ +/*============================================================================= + Copyright (c) 2001-2011 Joel de Guzman + + 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(FUSION_VALUE_AT_IMPL_07172005_0952) +#define FUSION_VALUE_AT_IMPL_07172005_0952 + +#include <boost/fusion/support/config.hpp> +#include <boost/fusion/support/detail/access.hpp> +#include <boost/type_traits/is_const.hpp> +#include <boost/mpl/eval_if.hpp> +#include <boost/mpl/bool.hpp> + +namespace boost { namespace fusion +{ + struct cons_tag; + + namespace extension + { + template <typename Tag> + struct value_at_impl; + + template <> + struct value_at_impl<cons_tag> + { + template <typename Sequence, typename N> + struct apply + { + typedef typename + mpl::eval_if< + mpl::bool_<N::value == 0> + , mpl::identity<typename Sequence::car_type> + , apply<typename Sequence::cdr_type, mpl::int_<N::value-1> > + >::type + type; + }; + }; + } +}} + +#endif |