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()30void 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()44int main() 45 { 46 test01(); 47 } 48