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-rw-r--r--boost/fusion/container/deque/detail/at_impl.hpp36
1 files changed, 21 insertions, 15 deletions
diff --git a/boost/fusion/container/deque/detail/at_impl.hpp b/boost/fusion/container/deque/detail/at_impl.hpp
index dc09d31b7c..0684dcf19e 100644
--- a/boost/fusion/container/deque/detail/at_impl.hpp
+++ b/boost/fusion/container/deque/detail/at_impl.hpp
@@ -1,8 +1,8 @@
/*=============================================================================
- Copyright (c) 2005-2011 Joel de Guzman
+ Copyright (c) 2005-2012 Joel de Guzman
Copyright (c) 2005-2006 Dan Marsden
- Distributed under the Boost Software License, Version 1.0. (See accompanying
+ 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_AT_IMPL_09122006_2017)
@@ -19,15 +19,15 @@
#include <boost/type_traits/add_const.hpp>
#include <boost/type_traits/add_reference.hpp>
-namespace boost { namespace fusion {
-
+namespace boost { namespace fusion
+{
struct deque_tag;
- namespace extension
+ namespace extension
{
template<typename T>
struct at_impl;
-
+
template<>
struct at_impl<deque_tag>
{
@@ -37,15 +37,21 @@ namespace boost { namespace fusion {
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 element_type;
- typedef typename add_reference<
- typename mpl::eval_if<
- is_const<Sequence>,
- add_const<element_type>,
- mpl::identity<element_type> >::type>::type type;
+
+ static int const offset = next_down::value + 1;
+ typedef mpl::int_<(N::value + offset)> adjusted_index;
+ typedef typename
+ detail::keyed_element_value_at<Sequence, adjusted_index>::type
+ element_type;
+
+ typedef typename
+ add_reference<
+ typename mpl::eval_if<
+ is_const<Sequence>,
+ add_const<element_type>,
+ mpl::identity<element_type> >::type
+ >::type
+ type;
static type call(Sequence& seq)
{