libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.hash/hash_shared_ptr.pass.cpp

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// <memory>

// template <class T>
// struct hash<shared_ptr<T>>
// {
//     typedef shared_ptr<T>    argument_type;
//     typedef size_t           result_type;
//     size_t operator()(const shared_ptr<T>& p) const;
// };

#include <memory>
#include <cassert>

#if TEST_STD_VER >= 11
#include "poisoned_hash_helper.h"

#include "test_macros.h"

struct A {};
#endif

int main(int, char**)
{
  {
    int* ptr = new int;
    std::shared_ptr<int> p(ptr);
    std::hash<std::shared_ptr<int> > f;
    std::size_t h = f(p);
    assert(h == std::hash<int*>()(ptr));
  }
#if TEST_STD_VER >= 11
  {
    test_hash_enabled_for_type<std::shared_ptr<int>>();
    test_hash_enabled_for_type<std::shared_ptr<A>>();
  }
#endif

  return 0;
}