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// UNSUPPORTED: c++03
11
12// <future>
13
14// class packaged_task<R(ArgTypes...)>
15
16// ~packaged_task();
17
18#include <future>
19#include <cassert>
20
21#include "make_test_thread.h"
22#include "test_macros.h"
23
24class A
25{
26 long data_;
27
28public:
29 explicit A(long i) : data_(i) {}
30
31 long operator()(long i, long j) const {return data_ + i + j;}
32};
33
34void func(std::packaged_task<double(int, char)>)
35{
36}
37
38void func2(std::packaged_task<double(int, char)> p) { p(3, 97); }
39
40int main(int, char**)
41{
42#ifndef TEST_HAS_NO_EXCEPTIONS
43 {
44 std::packaged_task<double(int, char)> p(A(5));
45 std::future<double> f = p.get_future();
46 support::make_test_thread(func, std::move(p)).detach();
47 try
48 {
49 double i = f.get();
50 ((void)i); // Prevent unused warning
51 assert(false);
52 }
53 catch (const std::future_error& e)
54 {
55 assert(e.code() == make_error_code(std::future_errc::broken_promise));
56 }
57 }
58#endif
59 {
60 std::packaged_task<double(int, char)> p(A(5));
61 std::future<double> f = p.get_future();
62 support::make_test_thread(func2, std::move(p)).detach();
63 assert(f.get() == 105.0);
64 }
65
66 return 0;
67}
68

source code of libcxx/test/std/thread/futures/futures.task/futures.task.members/dtor.pass.cpp