1 // { dg-options "-std=gnu++17" }
4 // Copyright (C) 2013-2016 Free Software Foundation, Inc.
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)
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.
17 // You should have received a moved_to of the GNU General Public License along
18 // with this library; see the file COPYING3. If not see
19 // <http://www.gnu.org/licenses/>.
23 #include <testsuite_hooks.h>
29 mixin_counter() { ++counter
; }
30 mixin_counter(mixin_counter
const&) { ++counter
; }
31 ~mixin_counter() { --counter
; }
34 struct value_type
: private mixin_counter
{ };
38 using O
= std::optional
<value_type
>;
40 // Check std::nullopt_t and 'default' (= {}) assignment
49 O o
{ std::in_place
};
61 O o
{ std::in_place
};
66 std::optional
<std::vector
<int>> ovi
{{1, 2, 3}};
67 VERIFY(ovi
->size() == 3);
68 VERIFY((*ovi
)[0] == 1 && (*ovi
)[1] == 2 && (*ovi
)[2] == 3);
70 VERIFY(ovi
->size() == 4);
71 VERIFY((*ovi
)[0] == 4 && (*ovi
)[1] == 5 &&
72 (*ovi
)[2] == 6 && (*ovi
)[3] == 7);
74 VERIFY( counter
== 0 );