libstdc++-v3/testsuite/tr1/2_general_utilities/memory/shared_ptr/cons/weak_ptr.cc

   1 // Copyright (C) 2005 Free Software Foundation
   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 2, 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 COPYING.  If not, write to the Free
  16 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  17 // USA.
  18
  19 // TR1 2.2.2 Template class shared_ptr [tr.util.smartptr.shared]
  20
  21 #include <tr1/memory>
  22 #include <testsuite_hooks.h>
  23
  24 struct A { };
  25
  26 // 2.2.3.1 shared_ptr constructors [tr.util.smartptr.shared.const]
  27
  28 // Construction from weak_ptr
  29 int
  30 test01()
  31 {
  32   bool test __attribute__((unused)) = true;
  33
  34   A * const a = new A;
  35   std::tr1::shared_ptr<A> a1(a);
  36   std::tr1::weak_ptr<A> wa(a1);
  37   std::tr1::shared_ptr<A> a2(wa);
  38   VERIFY( a2.get() == a );
  39   VERIFY( a2.use_count() == wa.use_count() );
  40
  41   return 0;
  42 }
  43
  44
  45 int
  46 main()
  47 {
  48   test01();
  49   return 0;
  50 }