libstdc++-v3/testsuite/23_containers/unordered_map/modifiers/61667.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2011-2025 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 void test01()
  24 {
  25   std::unordered_map<int, int> um(20);
  26
  27   std::size_t bkt_count = um.bucket_count();
  28
  29   um.max_load_factor(um.max_load_factor());
  30
  31   VERIFY( um.bucket_count() >= bkt_count );
  32
  33   um.max_load_factor(um.max_load_factor() * 2.f);
  34
  35   VERIFY( um.bucket_count() >= bkt_count );
  36 }
  37
  38 int main()
  39 {
  40   test01();
  41   return 0;
  42 }