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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/experimental/optional/assignment/5.cc
1 // { dg-do run { target c++14 } }
3 // Copyright (C) 2013-2024 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING3. If not see
18 // <http://www.gnu.org/licenses/>.
20 #include <experimental/optional>
22 #include <testsuite_hooks.h>
28 mixin_counter() { ++counter
; }
29 mixin_counter(mixin_counter
const&) { ++counter
; }
30 ~mixin_counter() { --counter
; }
33 struct value_type
: private mixin_counter
{ };
37 using O
= std::experimental::optional
<value_type
>;
39 // Check std::experimental::nullopt_t and 'default' (= {}) assignment
43 o
= std::experimental::nullopt
;
48 O o
{ std::experimental::in_place
};
49 o
= std::experimental::nullopt
;
60 O o
{ std::experimental::in_place
};
66 std::experimental::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);
75 VERIFY( counter
== 0 );