// { dg-do run { target c++11 } }
// { dg-require-effective-target hosted }

// Copyright (C) 2008-2023 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/>.

// 20.7.12.2 Template class shared_ptr [util.smartptr.shared]

#include <memory>
#include <testsuite_hooks.h>

struct A { };

struct D {
    void operator()(A* p) const { delete p;  ++count; }
    static int count;
};

int D::count = 0;

// 20.7.12.2.1 shared_ptr constructors [util.smartptr.shared.const]

// Construction from unique_ptr
void
test01()
{
  std::unique_ptr<A, D> up(new A, D());
  {
      std::shared_ptr<A> sp(std::move(up));
      VERIFY( up.get() == 0 );
      VERIFY( sp.get() != 0 );
      VERIFY( sp.use_count() == 1 );
  }
  VERIFY( D::count == 1 );
}

void
test02()
{
  D::count = 0;
  std::unique_ptr<A, D> up;
  {
    std::shared_ptr<A> sp = std::move(up);
  }
  VERIFY( D::count == 0 ); // LWG 2415
}

void
test03()
{
  struct D
  {
    D() = default;
    D(const D&) = delete; // not copyable or movable
    void operator()(int* p) const { delete p; }
  };

  using namespace std;
  static_assert( ! is_constructible<shared_ptr<int>, unique_ptr<int, D>>(),
		 "Constraints: is_move_constructible_v<D> is true" );
}

int
main()
{
  test01();
  test02();
  test03();
}