libstdc++-v3/testsuite/20_util/shared_ptr/cons/unique_ptr_deleter_ref_1.cc

   1 // { dg-do run { target c++11 } }
   2 // { dg-require-effective-target hosted }
   3
   4 // Copyright (C) 2008-2022 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // 20.7.12.2 Template class shared_ptr [util.smartptr.shared]
  22
  23 #include <memory>
  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 int
  39 test01()
  40 {
  41   D d = D();
  42   std::unique_ptr<A, D&> up(new A, d);
  43   {
  44       std::shared_ptr<A> sp(std::move(up));
  45       VERIFY( up.get() == 0 );
  46       VERIFY( sp.get() != 0 );
  47       VERIFY( sp.use_count() == 1 );
  48   }
  49   VERIFY( d.count == 1 );
  50
  51   return 0;
  52 }
  53
  54 int
  55 main()
  56 {
  57   test01();
  58   return 0;
  59 }