//===----------------------------------------------------------------------===//
//
// 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, c++11, c++14, c++17, c++20

// <flat_map>

// class flat_multimap

// friend void swap(flat_multimap& x, flat_multimap& y) noexcept

#include <flat_map>
#include <cassert>
#include <deque>
#include <functional>
#include <vector>

#include "MinSequenceContainer.h"
#include "MoveOnly.h"
#include "min_allocator.h"
#include "test_macros.h"
#include "../helpers.h"

// test noexcept

template <class T>
concept NoExceptAdlSwap = requires(T t1, T t2) {
  { swap(t1, t2) } noexcept;
};

static_assert(NoExceptAdlSwap<std::flat_multimap<int, int>>);

#ifndef TEST_HAS_NO_EXCEPTIONS
static_assert(NoExceptAdlSwap<
              std::flat_multimap<int, int, std::less<int>, ThrowOnMoveContainer<int>, ThrowOnMoveContainer<int>>>);
#endif

template <class KeyContainer, class ValueContainer>
constexpr void test() {
  using Key   = typename KeyContainer::value_type;
  using Value = typename ValueContainer::value_type;
  using M     = std::flat_multimap<Key, Value, std::less<Key>, KeyContainer, ValueContainer>;
  using V     = std::pair<const Key, Value>;

  {
    M m1;
    M m2;
    M m1_save = m1;
    M m2_save = m2;
    swap(m1, m2);
    assert(m1 == m2_save);
    assert(m2 == m1_save);
  }
  {
    V ar2[] = {V(5, 5), V(5, 6), V(5, 7), V(8, 8), V(9, 9), V(10, 10), V(10, 11), V(10, 12)};
    M m1;
    M m2(ar2, ar2 + sizeof(ar2) / sizeof(ar2[0]));
    M m1_save = m1;
    M m2_save = m2;
    swap(m1, m2);
    assert(m1 == m2_save);
    assert(m2 == m1_save);
  }
  {
    V ar1[] = {V(1, 1), V(1, 2), V(3, 3), V(4, 4)};
    M m1(ar1, ar1 + sizeof(ar1) / sizeof(ar1[0]));
    M m2;
    M m1_save = m1;
    M m2_save = m2;
    swap(m1, m2);
    assert(m1 == m2_save);
    assert(m2 == m1_save);
  }
  {
    V ar1[] = {V(1, 1), V(1, 2), V(3, 3), V(4, 4)};
    V ar2[] = {V(5, 5), V(5, 6), V(5, 7), V(8, 8), V(9, 9), V(10, 10), V(10, 11), V(10, 12)};
    M m1(ar1, ar1 + sizeof(ar1) / sizeof(ar1[0]));
    M m2(ar2, ar2 + sizeof(ar2) / sizeof(ar2[0]));
    M m1_save = m1;
    M m2_save = m2;
    swap(m1, m2);
    assert(m1 == m2_save);
    assert(m2 == m1_save);
  }
}

constexpr bool test() {
  test<std::vector<int>, std::vector<double>>();
#ifndef __cpp_lib_constexpr_deque
  if (!TEST_IS_CONSTANT_EVALUATED)
#endif
    test<std::deque<int>, std::vector<double>>();
  test<MinSequenceContainer<int>, MinSequenceContainer<double>>();
  test<std::vector<int, min_allocator<int>>, std::vector<double, min_allocator<double>>>();
  return true;
}

int main(int, char**) {
  test();
#if TEST_STD_VER >= 26
  static_assert(test());
#endif

  return 0;
}