libstdc++-v3/testsuite/23_containers/unordered_set/hash_policy/load_factor.cc

   1 // Copyright (C) 2011-2013 Free Software Foundation, Inc.
   2 //
   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)
   7 // any later version.
   8 //
   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.
  13 //
  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/>.
  17 //
  18 // { dg-options "-std=gnu++0x" }
  19
  20 #include <unordered_set>
  21 #include <testsuite_hooks.h>
  22
  23 void test01()
  24 {
  25   bool test __attribute__((unused)) = true;
  26   {
  27     std::unordered_set<int> us;
  28     for (int i = 0; i != 100000; ++i)
  29     {
  30       us.insert(i);
  31       VERIFY( us.load_factor() <= us.max_load_factor() );
  32     }
  33   }
  34   {
  35     std::unordered_set<int> us;
  36     us.max_load_factor(3.f);
  37     for (int i = 0; i != 100000; ++i)
  38     {
  39       us.insert(i);
  40       VERIFY( us.load_factor() <= us.max_load_factor() );
  41     }
  42   }
  43   {
  44     std::unordered_set<int> us;
  45     us.max_load_factor(.3f);
  46     for (int i = 0; i != 100000; ++i)
  47     {
  48       us.insert(i);
  49       VERIFY( us.load_factor() <= us.max_load_factor() );
  50     }
  51   }
  52 }
  53
  54 int main()
  55 {
  56   test01();
  57   return 0;
  58 }