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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 | ||
24 | namespace boost { namespace mpl { | |
25 | ||
26 | #if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES) | |
27 | ||
28 | template<> | |
29 | struct 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 | ||
42 | template<> | |
43 | struct 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 | ||
53 | template< long N > | |
54 | struct 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 |