1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // UNSUPPORTED: libcpp-has-no-threads
11
12 // UNSUPPORTED: c++98, c++03
13 // Libc++'s enum class emulation does not allow static_cast<Enum>(0) to work.
14
15 // <future>
16
17 // enum class future_errc
18 // {
19 // broken_promise = implementation-defined,
20 // future_already_retrieved = implementation-defined,
21 // promise_already_satisfied = implementation-defined,
22 // no_state = implementation-defined
23 // };
24
25 #include <future>
26
main()27 int main()
28 {
29 static_assert(std::future_errc::broken_promise != std::future_errc::future_already_retrieved, "");
30 static_assert(std::future_errc::broken_promise != std::future_errc::promise_already_satisfied, "");
31 static_assert(std::future_errc::broken_promise != std::future_errc::no_state, "");
32 static_assert(std::future_errc::future_already_retrieved != std::future_errc::promise_already_satisfied, "");
33 static_assert(std::future_errc::future_already_retrieved != std::future_errc::no_state, "");
34 static_assert(std::future_errc::promise_already_satisfied != std::future_errc::no_state, "");
35
36 static_assert(std::future_errc::broken_promise != static_cast<std::future_errc>(0), "");
37 static_assert(std::future_errc::future_already_retrieved != static_cast<std::future_errc>(0), "");
38 static_assert(std::future_errc::promise_already_satisfied != static_cast<std::future_errc>(0), "");
39 static_assert(std::future_errc::no_state != static_cast<std::future_errc>(0), "");
40 }
41