1 // { dg-do run { target c++14 } }
3 // Copyright (C) 2013-2018 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>
21 #include <testsuite_hooks.h>
27 // [20.5.5] In-place construction
28 static_assert( std::is_same
<decltype(std::experimental::in_place
), const std::experimental::in_place_t
>(), "" );
29 static_assert( std::is_empty
<std::experimental::in_place_t
>(), "" );
32 std::experimental::optional
<int> o
{ std::experimental::in_place
};
34 VERIFY( *o
== int() );
36 static_assert( !std::is_convertible
<std::experimental::in_place_t
, std::experimental::optional
<int>>(), "" );
40 std::experimental::optional
<int> o
{ std::experimental::in_place
, 42 };
46 std::experimental::optional
<std::vector
<int>> o
{ std::experimental::in_place
, 18, 4 };
48 VERIFY( o
->size() == 18 );
49 VERIFY( (*o
)[17] == 4 );
53 std::experimental::optional
<std::vector
<int>> o
{ std::experimental::in_place
, { 18, 4 } };
55 VERIFY( o
->size() == 2 );
56 VERIFY( (*o
)[0] == 18 );
60 std::experimental::optional
<std::vector
<int>> o
{ std::experimental::in_place
, { 18, 4 }, std::allocator
<int> {} };
62 VERIFY( o
->size() == 2 );
63 VERIFY( (*o
)[0] == 18 );