libstdc++-v3/testsuite/20_util/allocator_traits/members/92878_92947.cc

   1 // { dg-options "-std=gnu++20" }
   2 // { dg-do run { target c++20 } }
   3 // { dg-require-effective-target hosted }
   4
   5 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12 //
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 #include <memory>
  23 #include <testsuite_hooks.h>
  24
  25 struct aggressive_aggregate
  26 {
  27     int a;
  28     int b;
  29 };
  30
  31 void test01()
  32 {
  33   aggressive_aggregate x;
  34   std::allocator<aggressive_aggregate> a;
  35   using traits = std::allocator_traits<std::allocator<aggressive_aggregate>>;
  36   traits::destroy(a, &x);
  37   traits::construct(a, &x, 1, 2);
  38   VERIFY(x.a == 1);
  39   VERIFY(x.b == 2);
  40   traits::destroy(a, &x);
  41   traits::construct(a, &x, 1);
  42   VERIFY(x.a == 1);
  43   VERIFY(x.b == 0);
  44   traits::destroy(a, &x);
  45   traits::construct(a, &x);
  46   VERIFY(x.a == 0);
  47   VERIFY(x.b == 0);
  48 }
  49
  50 int main()
  51 {
  52   test01();
  53 }