libstdc++-v3/testsuite/20_util/auto_ptr/1.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
  57 // 20.4.5.1 auto_ptr constructors [lib.auto.ptr.cons]
  58
  59 // Construction from pointer
  60 int
  61 test01()
  62 {
  63   reset_count_struct __attribute__((unused)) reset;
  64   bool test __attribute__((unused)) = true;
  65
  66   std::auto_ptr<A> A_default;
  67   VERIFY( A_default.get() == 0 );
  68   VERIFY( A::ctor_count == 0 );
  69   VERIFY( A::dtor_count == 0 );
  70   VERIFY( B::ctor_count == 0 );
  71   VERIFY( B::dtor_count == 0 );
  72
  73   std::auto_ptr<A> A_from_A(new A);
  74   VERIFY( A_from_A.get() != 0 );
  75   VERIFY( A::ctor_count == 1 );
  76   VERIFY( A::dtor_count == 0 );
  77   VERIFY( B::ctor_count == 0 );
  78   VERIFY( B::dtor_count == 0 );
  79
  80   std::auto_ptr<A> A_from_B(new B);
  81   VERIFY( A_from_B.get() != 0 );
  82   VERIFY( A::ctor_count == 2 );
  83   VERIFY( A::dtor_count == 0 );
  84   VERIFY( B::ctor_count == 1 );
  85   VERIFY( B::dtor_count == 0 );
  86
  87   return 0;
  88 }
  89
  90 int
  91 main()
  92 {
  93   test01();
  94   return 0;
  95 }