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

// <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_map

// pair<iterator, iterator> equal_range(const key_type& k);

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

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

int main(int, char**) {
  {
    typedef std::unordered_map<int, std::string> C;
    typedef C::iterator I;
    typedef std::pair<int, std::string> P;
    P a[] = {
        P(10, "ten"),
        P(20, "twenty"),
        P(30, "thirty"),
        P(40, "forty"),
        P(50, "fifty"),
        P(60, "sixty"),
        P(70, "seventy"),
        P(80, "eighty"),
    };
    C c(std::begin(a), std::end(a));
    std::pair<I, I> r = c.equal_range(30);
    assert(std::distance(r.first, r.second) == 1);
    assert(r.first->first == 30);
    assert(r.first->second == "thirty");
    r = c.equal_range(5);
    assert(std::distance(r.first, r.second) == 0);
  }
#if TEST_STD_VER >= 11
  {
    typedef std::unordered_map<int,
                               std::string,
                               std::hash<int>,
                               std::equal_to<int>,
                               min_allocator<std::pair<const int, std::string>>>
        C;
    typedef C::iterator I;
    typedef std::pair<int, std::string> P;
    P a[] = {
        P(10, "ten"),
        P(20, "twenty"),
        P(30, "thirty"),
        P(40, "forty"),
        P(50, "fifty"),
        P(60, "sixty"),
        P(70, "seventy"),
        P(80, "eighty"),
    };
    C c(std::begin(a), std::end(a));
    std::pair<I, I> r = c.equal_range(30);
    assert(std::distance(r.first, r.second) == 1);
    assert(r.first->first == 30);
    assert(r.first->second == "thirty");
    r = c.equal_range(5);
    assert(std::distance(r.first, r.second) == 0);
  }
#endif

  return 0;
}
