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

// Copyright (C) 2000 Free Software Foundation
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.

// 20.4.5 Template class auto_ptr [lib.auto.ptr]

#include <memory>
#ifdef DEBUG_ASSERT
#  include <assert.h>
#endif


struct A
{
  A() { ++ctor_count; }
  virtual ~A() { ++dtor_count; }
  static long ctor_count;
  static long dtor_count;
};
long A::ctor_count = 0;
long A::dtor_count = 0;

struct B : A
{
  B() { ++ctor_count; }
  virtual ~B() { ++dtor_count; }
  static long ctor_count;
  static long dtor_count;
};
long B::ctor_count = 0;
long B::dtor_count = 0;


struct reset_count_struct
{
  ~reset_count_struct()
  {
    A::ctor_count = 0;
    A::dtor_count = 0;
    B::ctor_count = 0;
    B::dtor_count = 0;
  }
};


// 20.4.5.1 auto_ptr constructors [lib.auto.ptr.cons]

// Construction from pointer
bool test01()
{
  reset_count_struct reset;
  bool test = true;

  std::auto_ptr<A> A_default;
  test &= A_default.get() == 0;
  test &= A::ctor_count == 0;
  test &= A::dtor_count == 0;
  test &= B::ctor_count == 0;
  test &= B::dtor_count == 0;

  std::auto_ptr<A> A_from_A(new A);
  test &= A_from_A.get() != 0;
  test &= A::ctor_count == 1;
  test &= A::dtor_count == 0;
  test &= B::ctor_count == 0;
  test &= B::dtor_count == 0;

  std::auto_ptr<A> A_from_B(new B);
  test &= A_from_B.get() != 0;
  test &= A::ctor_count == 2;
  test &= A::dtor_count == 0;
  test &= B::ctor_count == 1;
  test &= B::dtor_count == 0;

#ifdef DEBUG_ASSERT
  assert(test);
#endif

  return test;
}

// Construction from std::auto_ptr
bool test02()
{
  reset_count_struct reset;
  bool test = true;

  std::auto_ptr<A> A_from_A(new A);
  std::auto_ptr<B> B_from_B(new B);

  std::auto_ptr<A> A_from_ptr_A(A_from_A);
  std::auto_ptr<A> A_from_ptr_B(B_from_B);
  test &= A_from_A.get() == 0;
  test &= B_from_B.get() == 0;
  test &= A_from_ptr_A.get() != 0;
  test &= A_from_ptr_B.get() != 0;
  test &= A::ctor_count == 2;
  test &= A::dtor_count == 0;
  test &= B::ctor_count == 1;
  test &= B::dtor_count == 0;

#ifdef DEBUG_ASSERT
  assert(test);
#endif

  return test;
}

// Assignment from std::auto_ptr
bool test03()
{
  reset_count_struct reset;
  bool test = true;

  std::auto_ptr<A> A_from_ptr_A;
  std::auto_ptr<A> A_from_ptr_B;
  std::auto_ptr<A> A_from_A(new A);
  std::auto_ptr<B> B_from_B(new B);

  A_from_ptr_A = A_from_A;
  A_from_ptr_B = B_from_B;
  test &= A_from_A.get() == 0;
  test &= B_from_B.get() == 0;
  test &= A_from_ptr_A.get() != 0;
  test &= A_from_ptr_B.get() != 0;
  test &= A::ctor_count == 2;
  test &= A::dtor_count == 0;
  test &= B::ctor_count == 1;
  test &= B::dtor_count == 0;

#ifdef DEBUG_ASSERT
  assert(test);
#endif

  return test;
}

// Destruction
bool test04()
{
  reset_count_struct reset;
  bool test = true;

  {/*lifetine scope*/
    std::auto_ptr<A> A_from_A(new A);
    std::auto_ptr<A> A_from_B(new B);
    std::auto_ptr<B> B_from_B(new B);
  }/*destructors called here*/

  test &= A::ctor_count == 3;
  test &= A::dtor_count == 3;
  test &= B::ctor_count == 2;
  test &= B::dtor_count == 2;

#ifdef DEBUG_ASSERT
  assert(test);
#endif

  return test;
}

// Class member construction/destruction
template <typename T>
class pimpl
{
public:
  pimpl() : p_impl(new T) {}
private:
  std::auto_ptr<T> p_impl;
};

bool test05()
{
  bool test = true;
  reset_count_struct reset;

  pimpl<A>();
  pimpl<B>();
  test &= A::ctor_count == 2;
  test &= A::dtor_count == 2;
  test &= B::ctor_count == 1;
  test &= B::dtor_count == 1;

#ifdef DEBUG_ASSERT
  assert(test);
#endif

  return test;
}


// 20.4.5.2 auto_ptr members [lib.auto.ptr.members]

// Member access
bool test06()
{
  reset_count_struct reset;
  bool test = true;

  std::auto_ptr<A> A_from_A(new A);
  std::auto_ptr<A> A_from_A_ptr(A_from_A.release());
  test &= A_from_A.get() == 0;
  test &= A_from_A_ptr.get() != 0;
  test &= A_from_A->ctor_count == 1;
  test &= (*A_from_A).dtor_count == 0;

  A* A_ptr = A_from_A_ptr.get();

  A_from_A_ptr.reset(A_ptr);
  test &= A_from_A_ptr.get() == A_ptr;
  test &= A_from_A_ptr->ctor_count == 1;
  test &= (*A_from_A_ptr).dtor_count == 0;

  A_from_A_ptr.reset(new A);
  test &= A_from_A_ptr.get() != A_ptr;
  test &= A_from_A_ptr->ctor_count == 2;
  test &= (*A_from_A_ptr).dtor_count == 1;

#ifdef DEBUG_ASSERT
  assert(test);
#endif

  return test;
}


// 20.4.5.3 auto_ptr conversions [lib.auto.ptr.conv]

// Parameters and return values
template <typename T>
static std::auto_ptr<T> source()
{
  return std::auto_ptr<T>(new T);
}

template <typename T>
static void drain(std::auto_ptr<T>)
{}

bool test07()
{
  bool test = true;
  reset_count_struct reset;

  drain(source<A>());
  drain<A>(source<B>());
  drain(source<B>());
  test &= A::ctor_count == 3;
  test &= A::dtor_count == 3;
  test &= B::ctor_count == 2;
  test &= B::dtor_count == 2;

#ifdef DEBUG_ASSERT
  assert(test);
#endif

  return test;
}


int main()
{
  bool test = true;

  test &= test01();
  test &= test02();
  test &= test03();
  test &= test04();
  test &= test05();
  test &= test06();
  test &= test07();

  return test ? 0 : 1;
}