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

   1 // { dg-options "-Wno-deprecated" }
   2 // { dg-add-options using-deprecated }
   3 // { dg-do run { target c++11 } }
   4
   5 // Copyright (C) 2005-2021 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 // 20.6.6.2 Template class shared_ptr [util.smartptr.shared]
  23
  24 #include <memory>
  25 #include <testsuite_hooks.h>
  26
  27 struct A
  28 {
  29   A() { ++ctor_count; }
  30   virtual ~A() { ++dtor_count; }
  31   static long ctor_count;
  32   static long dtor_count;
  33 };
  34 long A::ctor_count = 0;
  35 long A::dtor_count = 0;
  36
  37 struct B : A
  38 {
  39   B() { ++ctor_count; }
  40   virtual ~B() { ++dtor_count; }
  41   static long ctor_count;
  42   static long dtor_count;
  43 };
  44 long B::ctor_count = 0;
  45 long B::dtor_count = 0;
  46
  47
  48 struct reset_count_struct
  49 {
  50   ~reset_count_struct()
  51   {
  52     A::ctor_count = 0;
  53     A::dtor_count = 0;
  54     B::ctor_count = 0;
  55     B::dtor_count = 0;
  56   }
  57 };
  58
  59
  60 // 20.6.6.2.3 shared_ptr assignment [util.smartptr.shared.assign]
  61
  62 // Assignment from auto_ptr<Y>
  63 int
  64 test01()
  65 {
  66   reset_count_struct __attribute__((unused)) reset;
  67
  68   std::shared_ptr<A> a(new A);
  69   std::auto_ptr<B> b(new B);
  70   a = std::move(b);
  71   VERIFY( a.get() != 0 );
  72   VERIFY( b.get() == 0 );
  73   VERIFY( A::ctor_count == 2 );
  74   VERIFY( A::dtor_count == 1 );
  75   VERIFY( B::ctor_count == 1 );
  76   VERIFY( B::dtor_count == 0 );
  77
  78   return 0;
  79 }
  80
  81 int
  82 main()
  83 {
  84   test01();
  85   return 0;
  86 }