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

// <map>

// class multimap

// iterator insert(const_iterator position, const value_type& v);

#include <map>
#include <cassert>

#include "test_macros.h"
#include "min_allocator.h"

template <class Container>
void do_insert_hint_test() {
  typedef Container M;
  typedef typename M::iterator R;
  typedef typename M::value_type VT;
  M m;
  const VT v1(2, 2.5);
  R r = m.insert(m.end(), v1);
  assert(r == m.begin());
  assert(m.size() == 1);
  assert(r->first == 2);
  assert(r->second == 2.5);

  const VT v2(1, 1.5);
  r = m.insert(m.end(), v2);
  assert(r == m.begin());
  assert(m.size() == 2);
  assert(r->first == 1);
  assert(r->second == 1.5);

  const VT v3(3, 3.5);
  r = m.insert(m.end(), v3);
  assert(r == std::prev(m.end()));
  assert(m.size() == 3);
  assert(r->first == 3);
  assert(r->second == 3.5);

  const VT v4(3, 4.5);
  r = m.insert(std::prev(m.end()), v4);
  assert(r == std::prev(m.end(), 2));
  assert(m.size() == 4);
  assert(r->first == 3);
  assert(r->second == 4.5);
}

int main(int, char**) {
  do_insert_hint_test<std::multimap<int, double> >();
#if TEST_STD_VER >= 11
  {
    typedef std::multimap<int, double, std::less<int>, min_allocator<std::pair<const int, double>>> M;
    do_insert_hint_test<M>();
  }
#endif

  return 0;
}