blob: dcf83070b8f9d3b2404af173ad3c6450a4a02323 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
// { dg-options "-std=gnu++14" }
// { dg-do run }
// Copyright (C) 2013-2014 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a moved_to of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include <experimental/optional>
#include <testsuite_hooks.h>
int counter = 0;
struct mixin_counter
{
mixin_counter() { ++counter; }
mixin_counter(mixin_counter const&) { ++counter; }
~mixin_counter() { --counter; }
};
struct value_type : private mixin_counter { };
int main()
{
using O = std::experimental::optional<value_type>;
// Check std::experimental::nullopt_t and 'default' (= {}) assignment
{
O o;
o = std::experimental::nullopt;
VERIFY( !o );
}
{
O o { std::experimental::in_place };
o = std::experimental::nullopt;
VERIFY( !o );
}
{
O o;
o = {};
VERIFY( !o );
}
{
O o { std::experimental::in_place };
o = {};
VERIFY( !o );
}
VERIFY( counter == 0 );
}
|