1 // Copyright (C) 2016-2019 Free Software Foundation, Inc.
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3. If not see
16 // <http://www.gnu.org/licenses/>.
18 // { dg-do run { target c++11 } }
21 #include <unordered_set>
23 #include <testsuite_hooks.h>
27 std::__detail::_Power2_rehash_policy policy
;
28 VERIFY( policy
._M_next_bkt(1) == 2 );
29 VERIFY( policy
._M_next_bkt(2) == 4 );
30 VERIFY( policy
._M_next_bkt(3) == 4 );
31 VERIFY( policy
._M_next_bkt(5) == 8 );
32 VERIFY( policy
._M_next_bkt(33) == 64 );
33 VERIFY( policy
._M_next_bkt((std::size_t(1) << (sizeof(std::size_t) * 8 - 2)) + 1)
34 == (std::size_t(1) << (sizeof(std::size_t) * 8 - 1)) );
39 std::__detail::_Power2_rehash_policy policy
;
41 for (std::size_t i
= 1;;)
43 auto nxt
= policy
._M_next_bkt(i
);
47 // Equals only when reaching max.
48 constexpr auto mx
= std::numeric_limits
<std::size_t>::max();
49 VERIFY( nxt
== policy
._M_next_bkt(mx
) );