libstdc++-v3/testsuite/23_containers/unordered_set/cons/bucket_hint.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2020-2024 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 <vector>
  21 #include <forward_list>
  22 #include <unordered_set>
  23
  24 #include <testsuite_hooks.h>
  25
  26 void test01()
  27 {
  28   std::unordered_set<int> a;
  29   a.reserve(2);
  30
  31   std::unordered_set<int> b({ 0, 1, 0, 1, 0, 1, 0, 1 }, a.bucket_count());
  32   VERIFY( b.bucket_count() == a.bucket_count() );
  33 }
  34
  35 void test02()
  36 {
  37   std::unordered_set<int> a;
  38   a.reserve(2);
  39
  40   std::vector<int> v { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 };
  41
  42   std::unordered_set<int> b(v.begin(), v.end(), a.bucket_count());
  43   VERIFY( b.bucket_count() == a.bucket_count() );
  44 }
  45
  46 void test03()
  47 {
  48   std::unordered_set<int> a;
  49   a.reserve(2);
  50
  51   std::forward_list<int> fl { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 };
  52
  53   std::unordered_set<int> b(fl.begin(), fl.end(), a.bucket_count());
  54   VERIFY( b.bucket_count() == a.bucket_count() );
  55 }
  56
  57 int main()
  58 {
  59   test01();
  60   test02();
  61   test03();
  62   return 0;
  63 }