libstdc++-v3/testsuite/20_util/shared_ptr/cons/unique_ptr_deleter_ref_2.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2008-2019 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 // 20.7.12.2 Template class shared_ptr [util.smartptr.shared]
  21
  22 #include <memory>
  23 #include <functional>
  24 #include <testsuite_hooks.h>
  25
  26 struct A { };
  27
  28 struct D {
  29     typedef void result_type;
  30     void operator()(A* p) { delete p;  ++count; }
  31     int count;
  32 };
  33
  34
  35 // 20.7.12.2.1 shared_ptr constructors [util.smartptr.shared.const]
  36
  37 // Construction from unique_ptr
  38 // See: http://gcc.gnu.org/ml/libstdc++/2008-09/msg00070.html.
  39 int
  40 test01()
  41 {
  42   D d;
  43   std::unique_ptr<A, D&> p1(new A, d);
  44
  45   std::shared_ptr<A> p2(std::move(p1));
  46
  47   typedef std::reference_wrapper<D> D2;
  48   D2* p3 = std::get_deleter<D2>(p2);
  49
  50   VERIFY( p3 != 0 );
  51   VERIFY( &p3->get() == &d );
  52
  53   return 0;
  54 }
  55
  56 int
  57 main()
  58 {
  59   test01();
  60   return 0;
  61 }