libstdc++-v3/testsuite/20_util/auto_ptr/7.cc

   1 // Copyright (C) 2000-2024 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 // C++03 20.4.5 Template class auto_ptr [lib.auto.ptr]
  19
  20 // { dg-add-options using-deprecated }
  21 // { dg-warning "auto_ptr. is deprecated" "" { target c++11 } 0 }
  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 B : A
  37 {
  38   B() { ++ctor_count; }
  39   virtual ~B() { ++dtor_count; }
  40   static long ctor_count;
  41   static long dtor_count;
  42 };
  43 long B::ctor_count = 0;
  44 long B::dtor_count = 0;
  45
  46
  47 struct reset_count_struct
  48 {
  49   ~reset_count_struct()
  50   {
  51     A::ctor_count = 0;
  52     A::dtor_count = 0;
  53     B::ctor_count = 0;
  54     B::dtor_count = 0;
  55   }
  56 };
  57
  58 // 20.4.5.3 auto_ptr conversions [lib.auto.ptr.conv]
  59
  60 // Parameters and return values
  61 template <typename T>
  62 static std::auto_ptr<T> source()
  63 {
  64   return std::auto_ptr<T>(new T);
  65 }
  66
  67 template <typename T>
  68 static void drain(std::auto_ptr<T>)
  69 {}
  70
  71 int
  72 test07()
  73 {
  74   reset_count_struct __attribute__((unused)) reset;
  75
  76   drain(source<A>());
  77   // The resolution of core issue 84, now a DR, breaks this call.
  78   // drain<A>(source<B>());
  79   drain(source<B>());
  80   VERIFY( A::ctor_count == 2 );
  81   VERIFY( A::dtor_count == 2 );
  82   VERIFY( B::ctor_count == 1 );
  83   VERIFY( B::dtor_count == 1 );
  84   return 0;
  85 }
  86
  87 int
  88 main()
  89 {
  90   test07();
  91   return 0;
  92 }