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

   1 // Copyright (C) 2000-2017 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 // 20.4.5 Template class auto_ptr [lib.auto.ptr]
  19
  20 // { dg-options "-std=c++98" }
  21
  22 #include <memory>
  23 #include <testsuite_hooks.h>
  24
  25 struct A
  26 {
  27   A() { ++ctor_count; }
  28   virtual ~A() { ++dtor_count; }
  29   static long ctor_count;
  30   static long dtor_count;
  31 };
  32 long A::ctor_count = 0;
  33 long A::dtor_count = 0;
  34
  35 struct B : A
  36 {
  37   B() { ++ctor_count; }
  38   virtual ~B() { ++dtor_count; }
  39   static long ctor_count;
  40   static long dtor_count;
  41 };
  42 long B::ctor_count = 0;
  43 long B::dtor_count = 0;
  44
  45
  46 struct reset_count_struct
  47 {
  48   ~reset_count_struct()
  49   {
  50     A::ctor_count = 0;
  51     A::dtor_count = 0;
  52     B::ctor_count = 0;
  53     B::dtor_count = 0;
  54   }
  55 };
  56
  57 // 20.4.5.2 auto_ptr members [lib.auto.ptr.members]
  58
  59 // Member access
  60 int
  61 test06()
  62 {
  63   reset_count_struct __attribute__((unused)) reset;
  64
  65   std::auto_ptr<A> A_from_A(new A);
  66   std::auto_ptr<A> A_from_A_ptr(A_from_A.release());
  67   VERIFY( A_from_A.get() == 0 );
  68   VERIFY( A_from_A_ptr.get() != 0 );
  69   VERIFY( A_from_A_ptr->ctor_count == 1 );
  70   VERIFY( (*A_from_A_ptr).dtor_count == 0 );
  71
  72   A* A_ptr = A_from_A_ptr.get();
  73
  74   A_from_A_ptr.reset(A_ptr);
  75   VERIFY( A_from_A_ptr.get() == A_ptr );
  76   VERIFY( A_from_A_ptr->ctor_count == 1 );
  77   VERIFY( (*A_from_A_ptr).dtor_count == 0 );
  78
  79   A_from_A_ptr.reset(new A);
  80   VERIFY( A_from_A_ptr.get() != A_ptr );
  81   VERIFY( A_from_A_ptr->ctor_count == 2 );
  82   VERIFY( (*A_from_A_ptr).dtor_count == 1 );
  83   return 0;
  84 }
  85
  86 int
  87 main()
  88 {
  89   test06();
  90   return 0;
  91 }