/src/contrib/boost/mpl/vector/aux_/empty.hpp

 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: empty.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
14// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
15// $Revision: 49267 $
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