1 // { dg-options "-std=gnu++2a" }
2 // { dg-do run { target c++2a } }
3 
4 // Copyright (C) 2020-2021 Free Software Foundation, Inc.
5 //
6 // This file is part of the GNU ISO C++ Library.  This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
10 // any later version.
11 //
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 // GNU General Public License for more details.
16 //
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING3.  If not see
19 // <http://www.gnu.org/licenses/>.
20 
21 #include <optional>
22 #include <testsuite_hooks.h>
23 
24 struct aggressive_aggregate
25 {
26     int a;
27     int b;
28 };
29 
test01()30 void test01()
31 {
32   std::optional<aggressive_aggregate> x;
33   x.emplace(1, 2);
34   VERIFY(x->a == 1);
35   VERIFY(x->b == 2);
36   x.emplace(1);
37   VERIFY(x->a == 1);
38   VERIFY(x->b == 0);
39   x.emplace();
40   VERIFY(x->a == 0);
41   VERIFY(x->b == 0);
42 }
43 
main()44 int main()
45 {
46   test01();
47 }
48