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

   1 // Copyright (C) 2000, 2002, 2003, 2004 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 2, 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 COPYING.  If not, write to the Free
  16 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  17 // USA.
  18
  19 // 20.4.5 Template class auto_ptr [lib.auto.ptr]
  20
  21 #include <memory>
  22 #include <testsuite_hooks.h>
  23
  24 struct A
  25 {
  26   A() { ++ctor_count; }
  27   virtual ~A() { ++dtor_count; }
  28   static long ctor_count;
  29   static long dtor_count;
  30 };
  31 long A::ctor_count = 0;
  32 long A::dtor_count = 0;
  33
  34 struct B : A
  35 {
  36   B() { ++ctor_count; }
  37   virtual ~B() { ++dtor_count; }
  38   static long ctor_count;
  39   static long dtor_count;
  40 };
  41 long B::ctor_count = 0;
  42 long B::dtor_count = 0;
  43
  44
  45 struct reset_count_struct
  46 {
  47   ~reset_count_struct()
  48   {
  49     A::ctor_count = 0;
  50     A::dtor_count = 0;
  51     B::ctor_count = 0;
  52     B::dtor_count = 0;
  53   }
  54 };
  55
  56 // 20.4.5.3 auto_ptr conversions [lib.auto.ptr.conv]
  57
  58 // Parameters and return values
  59 template <typename T>
  60 static std::auto_ptr<T> source()
  61 {
  62   return std::auto_ptr<T>(new T);
  63 }
  64
  65 template <typename T>
  66 static void drain(std::auto_ptr<T>)
  67 {}
  68
  69 int
  70 test07()
  71 {
  72   bool test __attribute__((unused)) = true;
  73   reset_count_struct __attribute__((unused)) reset;
  74
  75   drain(source<A>());
  76   // The resolution of core issue 84, now a DR, breaks this call.
  77   // drain<A>(source<B>());
  78   drain(source<B>());
  79   VERIFY( A::ctor_count == 2 );
  80   VERIFY( A::dtor_count == 2 );
  81   VERIFY( B::ctor_count == 1 );
  82   VERIFY( B::dtor_count == 1 );
  83   return 0;
  84 }
  85
  86 int
  87 main()
  88 {
  89   test07();
  90   return 0;
  91 }