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

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2012-2016 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 // 20.7.2.2 Class template shared_ptr [util.smartptr.shared]
  21
  22 #include <memory>
  23 #include <testsuite_hooks.h>
  24
  25 int destroyed = 0;
  26
  27 struct A : std::enable_shared_from_this<A>
  28 {
  29   ~A() { ++destroyed; }
  30 };
  31
  32 // 20.7.2.2.1 shared_ptr constructors [util.smartptr.shared.const]
  33
  34 // Construction from unique_ptr<A[]>
  35 int
  36 test01()
  37 {
  38   std::unique_ptr<A[]> up(new A[2]);
  39   std::shared_ptr<A> sp(std::move(up));
  40   VERIFY( up.get() == 0 );
  41   VERIFY( sp.get() != 0 );
  42   VERIFY( sp.use_count() == 1 );
  43
  44   VERIFY( sp->shared_from_this() != nullptr );
  45
  46   sp.reset();
  47   VERIFY( destroyed == 2 );
  48
  49   return 0;
  50 }
  51
  52 int
  53 main()
  54 {
  55   test01();
  56   return 0;
  57 }