1 // { dg-do run { target c++11 } }
2 
3 // Copyright (C) 2013-2019 Free Software Foundation, Inc.
4 //
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)
9 // any later version.
10 
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.
15 
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/>.
19 
20 #include <memory>
21 #include <ext/pointer.h>
22 #include <testsuite_hooks.h>
23 
24 struct X : public std::enable_shared_from_this<X> { };
25 
test01()26 void test01()
27 {
28   std::unique_ptr<X> up(new X);
29   X* xp = up.get();
30   std::shared_ptr<X> sp(std::move(up));
31   VERIFY( xp->shared_from_this() != nullptr );
32 }
33 
34 using __gnu_cxx::_Pointer_adapter;
35 using __gnu_cxx::_Std_pointer_impl;
36 
37 struct Deleter
38 {
39   struct pointer : _Pointer_adapter<_Std_pointer_impl<X>>
40   {
41     using _Pointer_adapter::_Pointer_adapter;
operator X*Deleter::pointer42     operator X*() const noexcept { return this->get(); }
43   };
44 
operator ()Deleter45   void operator()(pointer p) const noexcept { delete (X*)p; }
46 };
47 
test02()48 void test02()
49 {
50   std::unique_ptr<X, Deleter> up(new X);
51   Deleter::pointer xp = up.get();
52   // Creating shared_ptr from unique_ptr with custom pointer is an extension:
53   std::shared_ptr<X> sp(std::move(up));
54   // but enable_shared_from_this should still work:
55   VERIFY( xp->shared_from_this() != nullptr );
56 }
57 
main()58 int main()
59 {
60   test01();
61   test02();
62 }
63