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 // UNSUPPORTED: no-threads
12
13 // check that <future> functions are marked [[nodiscard]]
14
15 // clang-format off
16
17 #include <future>
18
test()19 void test() {
20 std::async([]() {}); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
21 std::async(std::launch::any, []() {}); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
22 }
23