libstdc++-v3/testsuite/23_containers/unordered_set/modifiers/insert.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2020-2025 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 <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   auto bkt_count = a.bucket_count();
  32   a.insert({ 0, 1, 0, 1, 0, 1, 0, 1 });
  33   VERIFY( a.bucket_count() == bkt_count );
  34 }
  35
  36 void test02()
  37 {
  38   std::unordered_set<int> a;
  39   a.reserve(2);
  40
  41   std::vector<int> v { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 };
  42
  43   auto bkt_count = a.bucket_count();
  44   a.insert(v.begin(), v.end());
  45   VERIFY( a.bucket_count() == bkt_count );
  46 }
  47
  48 void test03()
  49 {
  50   std::unordered_set<int> a;
  51   a.reserve(2);
  52
  53   std::forward_list<int> fl { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 };
  54
  55   auto bkt_count = a.bucket_count();
  56   a.insert(fl.begin(), fl.end());
  57   VERIFY( a.bucket_count() == bkt_count );
  58 }
  59
  60 int main()
  61 {
  62   test01();
  63   test02();
  64   test03();
  65   return 0;
  66 }