1 // { dg-options "-std=gnu++0x" }
2 
3 // Copyright (C) 2012-2013 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library.  This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
9 // any later version.
10 //
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 // GNU General Public License for more details.
15 //
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING3.  If not see
18 // <http://www.gnu.org/licenses/>.
19 
20 #include <unordered_map>
21 #include <testsuite_hooks.h>
22 
23 bool test __attribute__((unused)) = true;
24 
test01()25 void test01()
26 {
27   const int N = 1000;
28 
29   typedef std::unordered_map<int, int> Map;
30   Map m;
31   m.reserve(N);
32 
33   std::size_t bkts = m.bucket_count();
34   for (int i = 0; i != N; ++i)
35     {
36       m.insert(std::make_pair(i, i));
37       // As long as we insert less than the reserved number of elements we
38       // shouldn't experiment any rehash.
39       VERIFY( m.bucket_count() == bkts );
40     }
41 }
42 
main()43 int main()
44 {
45   test01();
46   return 0;
47 }
48