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, c++11, c++14, c++17
10 
11 // <utility>
12 
13 // inline constexpr auto __for_each_index_sequence = []<size_t... _Index>(index_sequence<_Index...>, auto __func)
14 
15 #include <utility>
16 #include <cassert>
17 
18 #include "test_macros.h"
19 
test()20 constexpr bool test() {
21   int count = 0;
22   std::__for_each_index_sequence(std::make_index_sequence<8>(), [&]<std::size_t _Index> { count += _Index; });
23   assert(count == 28);
24 
25   return true;
26 }
27 
main(int,char **)28 int main(int, char**) {
29   test();
30   static_assert(test());
31 
32   return 0;
33 }
34