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