//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: c++03

// <unordered_map>

// template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
//           class Alloc = allocator<pair<const Key, T>>>
// class unordered_multimap

// template <class... Args>
//     iterator emplace_hint(const_iterator p, Args&&... args);

#include <unordered_map>
#include <cassert>
#include <iterator>

#include "../../../Emplaceable.h"
#include "min_allocator.h"
#include "test_macros.h"

int main(int, char**) {
  {
    typedef std::unordered_multimap<int, Emplaceable> C;
    typedef C::iterator R;
    C c;
    C::const_iterator e = c.end();
    R r = c.emplace_hint(e, std::piecewise_construct, std::forward_as_tuple(3), std::forward_as_tuple());
    assert(c.size() == 1);
    assert(r->first == 3);
    assert(r->second == Emplaceable());

    r = c.emplace_hint(c.end(), std::pair<const int, Emplaceable>(3, Emplaceable(5, 6)));
    assert(c.size() == 2);
    assert(r->first == 3);
    assert(r->second == Emplaceable(5, 6));
    LIBCPP_ASSERT(r == std::next(c.begin()));

    r = c.emplace_hint(r, std::piecewise_construct, std::forward_as_tuple(3), std::forward_as_tuple(6, 7));
    assert(c.size() == 3);
    assert(r->first == 3);
    assert(r->second == Emplaceable(6, 7));
    LIBCPP_ASSERT(r == std::next(c.begin()));
    r = c.begin();
    assert(r->first == 3);
    LIBCPP_ASSERT(r->second == Emplaceable());
    r = std::next(r, 2);
    assert(r->first == 3);
    LIBCPP_ASSERT(r->second == Emplaceable(5, 6));
  }
  {
    typedef std::unordered_multimap<int,
                                    Emplaceable,
                                    std::hash<int>,
                                    std::equal_to<int>,
                                    min_allocator<std::pair<const int, Emplaceable>>>
        C;
    typedef C::iterator R;
    C c;
    C::const_iterator e = c.end();
    R r = c.emplace_hint(e, std::piecewise_construct, std::forward_as_tuple(3), std::forward_as_tuple());
    assert(c.size() == 1);
    assert(r->first == 3);
    assert(r->second == Emplaceable());

    r = c.emplace_hint(c.end(), std::pair<const int, Emplaceable>(3, Emplaceable(5, 6)));
    assert(c.size() == 2);
    assert(r->first == 3);
    assert(r->second == Emplaceable(5, 6));
    LIBCPP_ASSERT(r == std::next(c.begin()));

    r = c.emplace_hint(r, std::piecewise_construct, std::forward_as_tuple(3), std::forward_as_tuple(6, 7));
    assert(c.size() == 3);
    assert(r->first == 3);
    assert(r->second == Emplaceable(6, 7));
    LIBCPP_ASSERT(r == std::next(c.begin()));
    r = c.begin();
    assert(r->first == 3);
    LIBCPP_ASSERT(r->second == Emplaceable());
    r = std::next(r, 2);
    assert(r->first == 3);
    LIBCPP_ASSERT(r->second == Emplaceable(5, 6));
  }

  return 0;
}
