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

// <set>

// class multiset

// void swap(multiset& m);

#include <set>
#include <cassert>
#include "test_macros.h"
#include "test_allocator.h"
#include "../../../test_compare.h"

int main(int, char**) {
  typedef int V;
  {
    typedef std::multiset<int> M;
    {
      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[] = {5, 6, 7, 8, 9, 10, 11, 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[] = {1, 2, 3, 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[] = {1, 2, 3, 4};
      V ar2[] = {5, 6, 7, 8, 9, 10, 11, 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);
    }
  }
  {
    typedef test_allocator<V> A;
    typedef test_less<int> C;
    typedef std::set<int, C, A> M;
    V ar1[] = {1, 2, 3, 4};
    V ar2[] = {5, 6, 7, 8, 9, 10, 11, 12};
    M m1(ar1, ar1 + sizeof(ar1) / sizeof(ar1[0]), C(1), A(1, 1));
    M m2(ar2, ar2 + sizeof(ar2) / sizeof(ar2[0]), C(2), A(1, 2));
    M m1_save = m1;
    M m2_save = m2;
    swap(m1, m2);
    assert(m1 == m2_save);
    assert(m2 == m1_save);
    assert(m1.key_comp() == C(2));
    assert(m1.get_allocator().get_id() == 1);
    assert(m2.key_comp() == C(1));
    assert(m2.get_allocator().get_id() == 2);
  }
  {
    typedef other_allocator<V> A;
    typedef test_less<int> C;
    typedef std::set<int, C, A> M;
    V ar1[] = {1, 2, 3, 4};
    V ar2[] = {5, 6, 7, 8, 9, 10, 11, 12};
    M m1(ar1, ar1 + sizeof(ar1) / sizeof(ar1[0]), C(1), A(1));
    M m2(ar2, ar2 + sizeof(ar2) / sizeof(ar2[0]), C(2), A(2));
    M m1_save = m1;
    M m2_save = m2;
    swap(m1, m2);
    assert(m1 == m2_save);
    assert(m2 == m1_save);
    assert(m1.key_comp() == C(2));
    assert(m1.get_allocator() == A(2));
    assert(m2.key_comp() == C(1));
    assert(m2.get_allocator() == A(1));
  }

  return 0;
}
