1 | |
2 | // Copyright Aleksey Gurtovoy 2000-2004 |
3 | // |
4 | // Distributed under the Boost Software License, Version 1.0. |
5 | // (See accompanying file LICENSE_1_0.txt or copy at |
6 | // http://www.boost.org/LICENSE_1_0.txt) |
7 | // |
8 | // See http://www.boost.org/libs/mpl for documentation. |
9 | |
10 | // $Id$ |
11 | // $Date$ |
12 | // $Revision$ |
13 | |
14 | #include <boost/mpl/advance.hpp> |
15 | #include <boost/mpl/iterator_tags.hpp> |
16 | #include <boost/mpl/aux_/test.hpp> |
17 | |
18 | template< int pos > struct iter |
19 | { |
20 | typedef mpl::bidirectional_iterator_tag category; |
21 | typedef iter<(pos + 1)> next; |
22 | typedef iter<(pos - 1)> prior; |
23 | typedef int_<pos> type; |
24 | }; |
25 | |
26 | #if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003)) |
27 | namespace boost { namespace mpl { |
28 | template< int pos, typename Default > struct tag< iter<pos>,Default > : void_ {}; |
29 | }} |
30 | #endif |
31 | |
32 | typedef iter<0> first; |
33 | typedef iter<10> last; |
34 | |
35 | MPL_TEST_CASE() |
36 | { |
37 | typedef mpl::advance<first,int_<10> >::type iter1; |
38 | typedef advance_c<first,10>::type iter2; |
39 | |
40 | MPL_ASSERT(( is_same<iter1, last> )); |
41 | MPL_ASSERT(( is_same<iter2, last> )); |
42 | } |
43 | |
44 | MPL_TEST_CASE() |
45 | { |
46 | typedef mpl::advance<last,int_<-10> >::type iter1; |
47 | typedef advance_c<last,-10>::type iter2; |
48 | |
49 | MPL_ASSERT(( is_same<iter1, first> )); |
50 | MPL_ASSERT(( is_same<iter2, first> )); |
51 | } |
52 | |