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: no-threads
10
11// <future>
12
13// class future<R>
14
15// future();
16
17#include <future>
18#include <cassert>
19
20#include "test_macros.h"
21
22int main(int, char**)
23{
24 {
25 std::future<int> f;
26 assert(!f.valid());
27 }
28 {
29 std::future<int&> f;
30 assert(!f.valid());
31 }
32 {
33 std::future<void> f;
34 assert(!f.valid());
35 }
36
37 return 0;
38}
39

source code of libcxx/test/std/thread/futures/futures.unique_future/default.pass.cpp