libstdc++-v3/testsuite/20_util/shared_ptr/assign/assign.cc

   1 // { dg-options "-std=gnu++0x" }
   2
   3 // Copyright (C) 2005, 2006, 2007 Free Software Foundation
   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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // 20.6.6.2 Template class shared_ptr [util.smartptr.shared]
  22
  23 #include <memory>
  24 #include <testsuite_hooks.h>
  25
  26 struct A
  27 {
  28   A() { ++ctor_count; }
  29   virtual ~A() { ++dtor_count; }
  30   static long ctor_count;
  31   static long dtor_count;
  32 };
  33 long A::ctor_count = 0;
  34 long A::dtor_count = 0;
  35
  36 struct reset_count_struct
  37 {
  38   ~reset_count_struct()
  39   {
  40     A::ctor_count = 0;
  41     A::dtor_count = 0;
  42   }
  43 };
  44
  45
  46 // 20.6.6.2.3 shared_ptr assignment [util.smartptr.shared.assign]
  47
  48 // Assignment from shared_ptr<Y>
  49 void
  50 test01()
  51 {
  52   reset_count_struct __attribute__((unused)) reset;
  53   bool test __attribute__((unused)) = true;
  54
  55   std::shared_ptr<A> a;
  56
  57   a = std::shared_ptr<A>(new A);
  58   VERIFY( a.get() != 0 );
  59   VERIFY( A::ctor_count == 1 );
  60   VERIFY( A::dtor_count == 0 );
  61
  62   a = std::shared_ptr<A>();
  63   VERIFY( a.get() == 0 );
  64   VERIFY( A::ctor_count == 1 );
  65   VERIFY( A::dtor_count == 1 );
  66 }
  67
  68 int
  69 main()
  70 {
  71   test01();
  72   return 0;
  73 }