libstdc++-v3/testsuite/tr1/2_general_utilities/enable_shared_from_this/still_shared.cc

   1 // Copyright (C) 2005-2019 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.
   8
   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.
  13
  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/>.
  17
  18 // 2.2.5 Template class enable_shared_from_this [tr.util.smartptr.enab]
  19
  20 #include <tr1/memory>
  21 #include <testsuite_hooks.h>
  22
  23 struct X : public std::tr1::enable_shared_from_this<X>
  24 {
  25 };
  26
  27 int
  28 test01()
  29 {
  30   bool test = true;
  31
  32   std::tr1::shared_ptr<X> p(new X);
  33
  34   *p = X();  // assigning to shared object doesn't stop it being shared
  35
  36   try
  37   {
  38     std::tr1::shared_ptr<X> p2 = p->shared_from_this();
  39   }
  40   catch (const std::tr1::bad_weak_ptr&)
  41   {
  42     test = false;
  43   }
  44   VERIFY( test );
  45
  46   return 0;
  47 }
  48
  49 int
  50 main()
  51 {
  52   test01();
  53   return 0;
  54 }