text: //===----------------------------------------------------------------------===//
  //
  //                     The LLVM Compiler Infrastructure
  //
  // This file is dual licensed under the MIT and the University of Illinois Open
  // Source Licenses. See LICENSE.TXT for details.
  //
  //===----------------------------------------------------------------------===//
  
  // UNSUPPORTED: c++98, c++03
  
  // <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
  
  // template <class... Args>
  //     pair<iterator, bool> emplace(Args&&... args);
  
  #include <unordered_map>
  #include <cassert>
  
  #include "../../../Emplaceable.h"
  #include "min_allocator.h"
  
  int main()
  {
      {
          typedef std::unordered_map<int, Emplaceable> C;
          typedef std::pair<C::iterator, bool> R;
          C c;
          R r = c.emplace(std::piecewise_construct, std::forward_as_tuple(3),
                                                    std::forward_as_tuple());
          assert(r.second);
          assert(c.size() == 1);
          assert(r.first->first == 3);
          assert(r.first->second == Emplaceable());
  
          r = c.emplace(std::pair<const int, Emplaceable>(4, Emplaceable(5, 6)));
          assert(r.second);
          assert(c.size() == 2);
          assert(r.first->first == 4);
          assert(r.first->second == Emplaceable(5, 6));
  
          r = c.emplace(std::piecewise_construct, std::forward_as_tuple(5),
                                                 std::forward_as_tuple(6, 7));
          assert(r.second);
          assert(c.size() == 3);
          assert(r.first->first == 5);
          assert(r.first->second == Emplaceable(6, 7));
      }
      {
          typedef std::unordered_map<int, Emplaceable, std::hash<int>, std::equal_to<int>,
                              min_allocator<std::pair<const int, Emplaceable>>> C;
          typedef std::pair<C::iterator, bool> R;
          C c;
          R r = c.emplace(std::piecewise_construct, std::forward_as_tuple(3),
                                                    std::forward_as_tuple());
          assert(r.second);
          assert(c.size() == 1);
          assert(r.first->first == 3);
          assert(r.first->second == Emplaceable());
  
          r = c.emplace(std::pair<const int, Emplaceable>(4, Emplaceable(5, 6)));
          assert(r.second);
          assert(c.size() == 2);
          assert(r.first->first == 4);
          assert(r.first->second == Emplaceable(5, 6));
  
          r = c.emplace(std::piecewise_construct, std::forward_as_tuple(5),
                                                 std::forward_as_tuple(6, 7));
          assert(r.second);
          assert(c.size() == 3);
          assert(r.first->first == 5);
          assert(r.first->second == Emplaceable(6, 7));
      }
  }
  