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

// mapped_type& operator[](const key_type& k);

// https://bugs.llvm.org/show_bug.cgi?id=16542

#include <unordered_map>
#include <tuple>

using namespace std;

struct my_hash
{
    size_t operator()(const tuple<int,int>&) const {return 0;}
};

int main()
{
    unordered_map<tuple<int,int>, size_t, my_hash> m;
    m[make_tuple(2,3)]=7;
}