1
2#ifndef BOOST_MPL_VECTOR_AUX_EMPTY_HPP_INCLUDED
3#define BOOST_MPL_VECTOR_AUX_EMPTY_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/empty_fwd.hpp>
18#include <boost/mpl/bool.hpp>
19#include <boost/mpl/vector/aux_/tag.hpp>
20#include <boost/mpl/aux_/config/typeof.hpp>
21#include <boost/mpl/aux_/config/ctps.hpp>
22#include <boost/type_traits/is_same.hpp>
23
24namespace boost { namespace mpl {
25
26#if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES)
27
28template<>
29struct empty_impl< aux::vector_tag >
30{
31 template< typename Vector > struct apply
32 : is_same<
33 typename Vector::lower_bound_
34 , typename Vector::upper_bound_
35 >
36 {
37 };
38};
39
40#else
41
42template<>
43struct empty_impl< aux::vector_tag<0> >
44{
45 template< typename Vector > struct apply
46 : true_
47 {
48 };
49};
50
51#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
52
53template< long N >
54struct empty_impl< aux::vector_tag<N> >
55{
56 template< typename Vector > struct apply
57 : false_
58 {
59 };
60};
61
62#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
63
64#endif // BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES
65
66}}
67
68#endif // BOOST_MPL_VECTOR_AUX_EMPTY_HPP_INCLUDED
69