libstdc++-v3/testsuite/20_util/auto_ptr/1.cc

   1 // Copyright (C) 2000-2014 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 #include <memory>
  21 #include <testsuite_hooks.h>
  22
  23 struct A
  24 {
  25   A() { ++ctor_count; }
  26   virtual ~A() { ++dtor_count; }
  27   static long ctor_count;
  28   static long dtor_count;
  29 };
  30 long A::ctor_count = 0;
  31 long A::dtor_count = 0;
  32
  33 struct B : A
  34 {
  35   B() { ++ctor_count; }
  36   virtual ~B() { ++dtor_count; }
  37   static long ctor_count;
  38   static long dtor_count;
  39 };
  40 long B::ctor_count = 0;
  41 long B::dtor_count = 0;
  42
  43
  44 struct reset_count_struct
  45 {
  46   ~reset_count_struct()
  47   {
  48     A::ctor_count = 0;
  49     A::dtor_count = 0;
  50     B::ctor_count = 0;
  51     B::dtor_count = 0;
  52   }
  53 };
  54
  55
  56 // 20.4.5.1 auto_ptr constructors [lib.auto.ptr.cons]
  57
  58 // Construction from pointer
  59 int
  60 test01()
  61 {
  62   reset_count_struct __attribute__((unused)) reset;
  63   bool test __attribute__((unused)) = true;
  64
  65   std::auto_ptr<A> A_default;
  66   VERIFY( A_default.get() == 0 );
  67   VERIFY( A::ctor_count == 0 );
  68   VERIFY( A::dtor_count == 0 );
  69   VERIFY( B::ctor_count == 0 );
  70   VERIFY( B::dtor_count == 0 );
  71
  72   std::auto_ptr<A> A_from_A(new A);
  73   VERIFY( A_from_A.get() != 0 );
  74   VERIFY( A::ctor_count == 1 );
  75   VERIFY( A::dtor_count == 0 );
  76   VERIFY( B::ctor_count == 0 );
  77   VERIFY( B::dtor_count == 0 );
  78
  79   std::auto_ptr<A> A_from_B(new B);
  80   VERIFY( A_from_B.get() != 0 );
  81   VERIFY( A::ctor_count == 2 );
  82   VERIFY( A::dtor_count == 0 );
  83   VERIFY( B::ctor_count == 1 );
  84   VERIFY( B::dtor_count == 0 );
  85
  86   return 0;
  87 }
  88
  89 int
  90 main()
  91 {
  92   test01();
  93   return 0;
  94 }