text: // { dg-do run { target c++11 } }
  
  // Copyright (C) 2005-2017 Free Software Foundation, Inc.
  //
  // 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 3, 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 COPYING3.  If not see
  // <http://www.gnu.org/licenses/>.
  
  // 20.6.6.2 Template class shared_ptr [util.smartptr.shared]
  
  #include <memory>
  #include <testsuite_hooks.h>
  
  struct A
  {
    A() { ++ctor_count; }
    ~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; }
    ~B() { ++dtor_count; }
    static long ctor_count;
    static long dtor_count;
  };
  long B::ctor_count = 0;
  long B::dtor_count = 0;
  
  struct D
  {
    void operator()(const B* p) { delete p; ++delete_count; }
    static long delete_count;
  };
  long D::delete_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;
      D::delete_count = 0;
    }
  };
  
  
  // 20.6.6.2.2 shared_ptr destructor [util.smartptr.shared.dest]
  
  // empty shared_ptr
  int
  test01()
  {
    reset_count_struct __attribute__((unused)) reset;
  
    {
      std::shared_ptr<A> a;
    }
    VERIFY( A::ctor_count == 0 );
    VERIFY( A::dtor_count == 0 );
    VERIFY( B::ctor_count == 0 );
    VERIFY( B::dtor_count == 0 );
    VERIFY( D::delete_count == 0 );
  
    return 0;
  }
  
  // shared ownership
  int
  test02()
  {
    reset_count_struct __attribute__((unused)) reset;
  
    std::shared_ptr<A> a;
    {
      a = std::shared_ptr<A>(new B, D());
    }
    VERIFY( A::ctor_count == 1 );
    VERIFY( A::dtor_count == 0 );
    VERIFY( B::ctor_count == 1 );
    VERIFY( B::dtor_count == 0 );
    VERIFY( D::delete_count == 0 );
  
    return 0;
  }
  
  // exclusive ownership
  int
  test03()
  {
    reset_count_struct __attribute__((unused)) reset;
  
    {
      std::shared_ptr<A> a1(new B);
      std::shared_ptr<A> a2(new B, D());
    }
    VERIFY( A::ctor_count == 2 );
    VERIFY( A::dtor_count == 2 );
    VERIFY( B::ctor_count == 2 );
    VERIFY( B::dtor_count == 2 );
    VERIFY( D::delete_count == 1 );
  
    return 0;
  }
  
  
  int
  main()
  {
    test01();
    test02();
    test03();
    return 0;
  }
  