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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/20_util/weak_ptr/cons/deduction.cc
1 // Copyright (C) 2017-2021 Free Software Foundation, Inc.
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3. If not see
16 // <http://www.gnu.org/licenses/>.
18 // { dg-options "-std=gnu++17" }
19 // { dg-do compile { target c++17 } }
23 template<typename T
, typename U
> struct require_same
;
24 template<typename T
> struct require_same
<T
, T
> { using type
= void; };
26 template<typename T
, typename U
>
27 typename require_same
<T
, U
>::type
33 std::shared_ptr
<long> s
;
35 check_type
<std::weak_ptr
<long>>(w
);
38 check_type
<std::weak_ptr
<long>>(w2
);