diff options
author | Anas Nashif <anas.nashif@intel.com> | 2012-10-30 12:57:26 -0700 |
---|---|---|
committer | Anas Nashif <anas.nashif@intel.com> | 2012-10-30 12:57:26 -0700 |
commit | 1a78a62555be32868418fe52f8e330c9d0f95d5a (patch) | |
tree | d3765a80e7d3b9640ec2e930743630cd6b9fce2b /boost/fusion/container/deque/detail/value_at_impl.hpp | |
download | boost-1a78a62555be32868418fe52f8e330c9d0f95d5a.tar.gz boost-1a78a62555be32868418fe52f8e330c9d0f95d5a.tar.bz2 boost-1a78a62555be32868418fe52f8e330c9d0f95d5a.zip |
Imported Upstream version 1.49.0upstream/1.49.0
Diffstat (limited to 'boost/fusion/container/deque/detail/value_at_impl.hpp')
-rw-r--r-- | boost/fusion/container/deque/detail/value_at_impl.hpp | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/boost/fusion/container/deque/detail/value_at_impl.hpp b/boost/fusion/container/deque/detail/value_at_impl.hpp new file mode 100644 index 0000000000..64dbe5e16f --- /dev/null +++ b/boost/fusion/container/deque/detail/value_at_impl.hpp @@ -0,0 +1,43 @@ +/*============================================================================= + Copyright (c) 2005-2011 Joel de Guzman + Copyright (c) 2005-2006 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_DEQUE_VALUE_AT_IMPL_08122006_0756) +#define BOOST_FUSION_DEQUE_VALUE_AT_IMPL_08122006_0756 + +#include <boost/fusion/container/deque/detail/keyed_element.hpp> + +#include <boost/mpl/equal_to.hpp> +#include <boost/mpl/assert.hpp> + +namespace boost { namespace fusion { + + struct deque_tag; + + namespace extension + { + template<typename T> + struct value_at_impl; + + template<> + struct value_at_impl<deque_tag> + { + template<typename Sequence, typename N> + struct apply + { + typedef typename Sequence::next_up next_up; + typedef typename Sequence::next_down next_down; + BOOST_MPL_ASSERT_RELATION(next_down::value, !=, next_up::value); + + typedef mpl::plus<next_down, mpl::int_<1> > offset; + typedef mpl::int_<mpl::plus<N, offset>::value> adjusted_index; + typedef typename detail::keyed_element_value_at<Sequence, adjusted_index>::type type; + }; + }; + } +}} + +#endif |