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1 | ||
2 | #ifndef BOOST_MPL_EMPTY_SEQUENCE_HPP_INCLUDED | |
3 | #define BOOST_MPL_EMPTY_SEQUENCE_HPP_INCLUDED | |
4 | ||
5 | // Copyright Aleksey Gurtovoy 2004 | |
6 | // Copyright Alexander Nasonov 2004 | |
7 | // | |
8 | // Distributed under the Boost Software License, Version 1.0. | |
9 | // (See accompanying file LICENSE_1_0.txt or copy at | |
10 | // http://www.boost.org/LICENSE_1_0.txt) | |
11 | // | |
12 | // See http://www.boost.org/libs/mpl for documentation. | |
13 | ||
14 | // $Id$ | |
15 | // $Date$ | |
16 | // $Revision$ | |
17 | ||
18 | #include <boost/mpl/size_fwd.hpp> | |
19 | #include <boost/mpl/int.hpp> | |
20 | #include <boost/mpl/iterator_tags.hpp> | |
21 | ||
22 | namespace boost { namespace mpl { | |
23 | ||
24 | struct empty_sequence | |
25 | { | |
26 | struct tag; | |
27 | typedef empty_sequence type; | |
28 | struct begin { typedef random_access_iterator_tag category; }; | |
29 | typedef begin end; | |
30 | }; | |
31 | ||
32 | template<> | |
33 | struct size_impl<empty_sequence::tag> | |
34 | { | |
35 | template< typename Sequence > struct apply | |
36 | : int_<0> | |
37 | { | |
38 | }; | |
39 | }; | |
40 | ||
41 | }} | |
42 | ||
43 | #endif // #ifndef BOOST_MPL_EMPTY_SEQUENCE_HPP_INCLUDED |