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1 \r
2 #ifndef BOOST_MPL_VECTOR_AUX_BACK_HPP_INCLUDED\r
3 #define BOOST_MPL_VECTOR_AUX_BACK_HPP_INCLUDED\r
4 \r
5 // Copyright Aleksey Gurtovoy 2000-2004\r
6 //\r
7 // Distributed under the Boost Software License, Version 1.0. \r
8 // (See accompanying file LICENSE_1_0.txt or copy at \r
9 // http://www.boost.org/LICENSE_1_0.txt)\r
10 //\r
11 // See http://www.boost.org/libs/mpl for documentation.\r
12 \r
13 // $Id: back.hpp 49267 2008-10-11 06:19:02Z agurtovoy $\r
14 // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $\r
15 // $Revision: 49267 $\r
16 \r
17 #include <boost/mpl/back_fwd.hpp>\r
18 #include <boost/mpl/next_prior.hpp>\r
19 #include <boost/mpl/vector/aux_/at.hpp>\r
20 #include <boost/mpl/vector/aux_/tag.hpp>\r
21 #include <boost/mpl/aux_/config/typeof.hpp>\r
22 #include <boost/mpl/aux_/config/ctps.hpp>\r
23 \r
24 namespace boost { namespace mpl {\r
25 \r
26 #if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES)\r
27 \r
28 template<>\r
29 struct back_impl< aux::vector_tag >\r
30 {\r
31     template< typename Vector > struct apply\r
32         : v_at<\r
33               Vector\r
34             , prior<typename Vector::size>::type::value\r
35             >\r
36     {\r
37     };\r
38 };\r
39 \r
40 #else\r
41 \r
42 #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)\r
43 \r
44 template< long n_ >\r
45 struct back_impl< aux::vector_tag<n_> >\r
46 {\r
47     template< typename Vector > struct apply\r
48     {\r
49         typedef typename Vector::back type;\r
50     };\r
51 };\r
52 \r
53 #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION\r
54 \r
55 #endif // BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES\r
56 \r
57 }}\r
58 \r
59 #endif // BOOST_MPL_VECTOR_AUX_BACK_HPP_INCLUDED\r