PR libstdc++/80229 restore support for shared_ptr<function type>
[official-gcc.git] / libstdc++-v3 / testsuite / 20_util / enable_shared_from_this / members / const.cc
blob3f8a6a536e64ba6a46bcbe3037d344cceca85eba
1 // Copyright (C) 2015-2017 Free Software Foundation, Inc.
2 //
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)
7 // any later version.
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-do run { target c++11 } }
20 #include <memory>
21 #include <testsuite_hooks.h>
23 template<typename T, typename U>
24 bool
25 share_ownership(const std::shared_ptr<T>& p1, const std::shared_ptr<U>& p2)
27 return !p1.owner_before(p2) && !p2.owner_before(p1);
30 void
31 test01()
33 struct X : public std::enable_shared_from_this<X> { };
34 using CX = const X;
35 std::shared_ptr<CX> p(new CX);
36 VERIFY( share_ownership(p->shared_from_this(), p) );
37 p.reset(new X);
38 VERIFY( share_ownership(p->shared_from_this(), p) );
39 auto p2 = std::const_pointer_cast<X>(p)->shared_from_this();
40 VERIFY( share_ownership(p2, p) );
43 void
44 test02()
46 struct X;
47 using CX = const X;
48 struct X : public std::enable_shared_from_this<CX> { };
49 std::shared_ptr<CX> p(new X);
50 VERIFY( share_ownership(p->shared_from_this(), p) );
51 p.reset(new CX);
52 VERIFY( share_ownership(p->shared_from_this(), p) );
55 int
56 main()
58 test01();
59 test02();