text: //===----------------------------------------------------------------------===//
  //
  // 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
  
  // size_type bucket_size(size_type n) const
  
  #ifdef _LIBCPP_DEBUG
  #define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
  #endif
  
  #include <unordered_map>
  #include <string>
  #include <cassert>
  
  #include "test_macros.h"
  #include "min_allocator.h"
  
  int main(int, char**)
  {
      {
          typedef std::unordered_map<int, std::string> C;
          typedef std::pair<int, std::string> P;
          P a[] =
          {
              P(1, "one"),
              P(2, "two"),
              P(3, "three"),
              P(4, "four"),
              P(1, "four"),
              P(2, "four"),
          };
          const C c(std::begin(a), std::end(a));
          assert(c.bucket_count() >= 5);
          LIBCPP_ASSERT(c.bucket_size(0) == 0);
          LIBCPP_ASSERT(c.bucket_size(1) == 1);
          LIBCPP_ASSERT(c.bucket_size(2) == 1);
          LIBCPP_ASSERT(c.bucket_size(3) == 1);
          LIBCPP_ASSERT(c.bucket_size(4) == 1);
      }
  #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 std::pair<int, std::string> P;
          P a[] =
          {
              P(1, "one"),
              P(2, "two"),
              P(3, "three"),
              P(4, "four"),
              P(1, "four"),
              P(2, "four"),
          };
          const C c(std::begin(a), std::end(a));
          assert(c.bucket_count() >= 5);
          LIBCPP_ASSERT(c.bucket_size(0) == 0);
          LIBCPP_ASSERT(c.bucket_size(1) == 1);
          LIBCPP_ASSERT(c.bucket_size(2) == 1);
          LIBCPP_ASSERT(c.bucket_size(3) == 1);
          LIBCPP_ASSERT(c.bucket_size(4) == 1);
      }
  #endif
  #if _LIBCPP_DEBUG_LEVEL >= 1
      {
          typedef std::unordered_map<int, std::string> C;
          C c;
          (void) c.bucket_size(3);
          assert(false);
      }
  #endif
  
    return 0;
  }
  