libstdc++-v3/testsuite/tr1/2_general_utilities/shared_ptr/observers/bool_conv.cc

   1 // Copyright (C) 2005-2021 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 // TR1 2.2.2 Template class shared_ptr [tr.util.smartptr.shared]
  19
  20 #include <tr1/memory>
  21 #include <testsuite_hooks.h>
  22
  23 struct A { };
  24
  25 // 2.2.3.5 shared_ptr observers [tr.util.smartptr.shared.obs]
  26
  27 // conversion to bool
  28 int
  29 test01()
  30 {
  31   const std::tr1::shared_ptr<A> p1;
  32   VERIFY( bool(p1) == false );
  33   const std::tr1::shared_ptr<A> p2(p1);
  34   VERIFY( bool(p2) == false );
  35
  36   return 0;
  37 }
  38
  39 int
  40 test02()
  41 {
  42   std::tr1::shared_ptr<A> p1(new A);
  43   VERIFY( p1 );
  44   std::tr1::shared_ptr<A> p2(p1);
  45   VERIFY( p2 );
  46   p1.reset();
  47   VERIFY( !p1 );
  48   VERIFY( p2 );
  49
  50   return 0;
  51 }
  52
  53 int
  54 test03()
  55 {
  56   std::tr1::shared_ptr<A> p1(new A);
  57   std::tr1::shared_ptr<A> p2(p1);
  58   p2.reset(new A);
  59   VERIFY( p1 );
  60   VERIFY( p2 );
  61
  62   return 0;
  63 }
  64
  65
  66 int
  67 main()
  68 {
  69   test01();
  70   test02();
  71   test03();
  72   return 0;
  73 }