1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// UNSUPPORTED: c++03
10
11// <unordered_map>
12
13// template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
14// class Alloc = allocator<pair<const Key, T>>>
15// class unordered_map
16
17// mapped_type& operator[](const key_type& k);
18
19// https://llvm.org/PR16542
20
21#include <cstddef>
22#include <tuple>
23#include <unordered_map>
24
25struct my_hash {
26 std::size_t operator()(const std::tuple<int, int>&) const { return 0; }
27};
28
29int main(int, char**) {
30 std::unordered_map<std::tuple<int, int>, std::size_t, my_hash> m;
31 m[std::make_tuple(args: 2, args: 3)] = 7;
32
33 return 0;
34}
35

source code of libcxx/test/std/containers/unord/unord.map/unord.map.elem/index_tuple.pass.cpp