libstdc++-v3/testsuite/20_util/auto_ptr/6.cc

   1 // Copyright (C) 2000, 2002, 2003, 2004, 2009 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 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 // 20.4.5 Template class auto_ptr [lib.auto.ptr]
  19
  20 #include <memory>
  21 #include <testsuite_hooks.h>
  22
  23 struct A
  24 {
  25   A() { ++ctor_count; }
  26   virtual ~A() { ++dtor_count; }
  27   static long ctor_count;
  28   static long dtor_count;
  29 };
  30 long A::ctor_count = 0;
  31 long A::dtor_count = 0;
  32
  33 struct B : A
  34 {
  35   B() { ++ctor_count; }
  36   virtual ~B() { ++dtor_count; }
  37   static long ctor_count;
  38   static long dtor_count;
  39 };
  40 long B::ctor_count = 0;
  41 long B::dtor_count = 0;
  42
  43
  44 struct reset_count_struct
  45 {
  46   ~reset_count_struct()
  47   {
  48     A::ctor_count = 0;
  49     A::dtor_count = 0;
  50     B::ctor_count = 0;
  51     B::dtor_count = 0;
  52   }
  53 };
  54
  55 // 20.4.5.2 auto_ptr members [lib.auto.ptr.members]
  56
  57 // Member access
  58 int
  59 test06()
  60 {
  61   reset_count_struct __attribute__((unused)) reset;
  62   bool test __attribute__((unused)) = true;
  63
  64   std::auto_ptr<A> A_from_A(new A);
  65   std::auto_ptr<A> A_from_A_ptr(A_from_A.release());
  66   VERIFY( A_from_A.get() == 0 );
  67   VERIFY( A_from_A_ptr.get() != 0 );
  68   VERIFY( A_from_A_ptr->ctor_count == 1 );
  69   VERIFY( (*A_from_A_ptr).dtor_count == 0 );
  70
  71   A* A_ptr = A_from_A_ptr.get();
  72
  73   A_from_A_ptr.reset(A_ptr);
  74   VERIFY( A_from_A_ptr.get() == A_ptr );
  75   VERIFY( A_from_A_ptr->ctor_count == 1 );
  76   VERIFY( (*A_from_A_ptr).dtor_count == 0 );
  77
  78   A_from_A_ptr.reset(new A);
  79   VERIFY( A_from_A_ptr.get() != A_ptr );
  80   VERIFY( A_from_A_ptr->ctor_count == 2 );
  81   VERIFY( (*A_from_A_ptr).dtor_count == 1 );
  82   return 0;
  83 }
  84
  85 int
  86 main()
  87 {
  88   test06();
  89   return 0;
  90 }