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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/experimental/optional/swap/1.cc
1 // { dg-options "-std=gnu++1y" }
4 // Copyright (C) 2013 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/>.
21 #include <experimental/optional>
22 #include <testsuite_hooks.h>
30 mixin_counter() { ++counter
; }
31 mixin_counter(mixin_counter
const&) { ++counter
; }
32 ~mixin_counter() { --counter
; }
38 struct value_type
: private mixin_counter
40 explicit value_type(int state
) : state(state
) { }
47 swap(value_type
& lhs
, value_type
& rhs
)
51 swap(lhs
.state
, rhs
.state
);
58 using O
= std::experimental::optional
<ns::value_type
>;
60 VERIFY( ns::swaps
== 0 );
70 O o
{ std::experimental::in_place
, 45 }, p
;
73 VERIFY( p
&& p
->state
== 45 );
77 O o
, p
{ std::experimental::in_place
, 45 };
79 VERIFY( o
&& o
->state
== 45 );
84 O o
{ std::experimental::in_place
, 167 }, p
{ std::experimental::in_place
, 999 };
85 VERIFY( ns::swaps
== 0 );
89 VERIFY( o
&& o
->state
== 999 );
90 VERIFY( p
&& p
->state
== 167 );
91 VERIFY( ns::swaps
== 1 );
94 VERIFY( counter
== 0 );