libstdc++-v3/testsuite/23_containers/unordered_set/operations/contains.cc

   1 // Copyright (C) 2018-2022 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++2a" }
  19 // { dg-do run { target c++2a } }
  20
  21 #include <unordered_set>
  22 #include <testsuite_hooks.h>
  23
  24 void
  25 test01()
  26 {
  27   std::unordered_set<int> m;
  28   VERIFY( ! m.contains( 0 ) );
  29   VERIFY( ! m.contains( 1 ) );
  30   m.insert(0);
  31   VERIFY( m.contains( 0 ) );
  32   VERIFY( ! m.contains( 1 ) );
  33   m.insert(1);
  34   VERIFY( m.contains( 0 ) );
  35   VERIFY( m.contains( 1 ) );
  36 }
  37
  38 int
  39 main()
  40 {
  41   test01();
  42 }