// { dg-options "-std=gnu++0x" } // Copyright (C) 2012-2014 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING3. If not see // . #include #include bool test __attribute__((unused)) = true; void test01() { const int N = 1000; typedef std::unordered_map Map; Map m; m.reserve(N); std::size_t bkts = m.bucket_count(); for (int i = 0; i != N; ++i) { m.insert(std::make_pair(i, i)); // As long as we insert less than the reserved number of elements we // shouldn't experiment any rehash. VERIFY( m.bucket_count() == bkts ); } } int main() { test01(); return 0; }