Fix some includes for consistency and use correct accessors macros.

Since we have accessors macros for wrapped attributes we better use them,
to improve readability of the macros.

include/boost/fusion/adapted/struct/adapt_struct.hpp

@@ -14,6 +14,8 @@
 #include <boost/preprocessor/config/config.hpp>
 #include <boost/preprocessor/cat.hpp>
 #include <boost/preprocessor/empty.hpp>
+#include <boost/preprocessor/control/if.hpp>
+#include <boost/preprocessor/comparison/less.hpp>
 #include <boost/preprocessor/comparison/equal.hpp>
 #include <boost/type_traits/add_reference.hpp>
 #include <boost/type_traits/is_const.hpp>
@@ -42,10 +44,12 @@
             IS_VIEW,                                                            \
             I,                                                                  \
             BOOST_PP_IF(IS_VIEW, BOOST_FUSION_PROXY_PREFIX, BOOST_PP_EMPTY),    \
-            BOOST_PP_TUPLE_ELEM(2, 1, ATTRIBUTE),                               \
-            BOOST_PP_TUPLE_ELEM(2, 0, ATTRIBUTE),                               \
+            BOOST_FUSION_ADAPT_STRUCT_WRAPPEDATTR(ATTRIBUTE),                   \
+            BOOST_FUSION_ADAPT_STRUCT_WRAPPEDATTR_SIZE(ATTRIBUTE),              \
             BOOST_PP_IF(                                                        \
-                BOOST_PP_LESS(BOOST_PP_TUPLE_ELEM(2, 0, ATTRIBUTE),2), 1, 0))
+                BOOST_PP_LESS(                                                  \
+                  BOOST_FUSION_ADAPT_STRUCT_WRAPPEDATTR_SIZE(ATTRIBUTE),2)      \
+                , 1, 0))