44 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8//9// UNSUPPORTED: no-threads10 11// UNSUPPORTED: c++0312// Libc++'s enum class emulation does not allow static_cast<Enum>(0) to work.13 14// <future>15 16// enum class future_errc17// {18// broken_promise = implementation-defined,19// future_already_retrieved = implementation-defined,20// promise_already_satisfied = implementation-defined,21// no_state = implementation-defined22// };23 24#include <future>25 26#include "test_macros.h"27 28int main(int, char**)29{30 static_assert(std::future_errc::broken_promise != std::future_errc::future_already_retrieved, "");31 static_assert(std::future_errc::broken_promise != std::future_errc::promise_already_satisfied, "");32 static_assert(std::future_errc::broken_promise != std::future_errc::no_state, "");33 static_assert(std::future_errc::future_already_retrieved != std::future_errc::promise_already_satisfied, "");34 static_assert(std::future_errc::future_already_retrieved != std::future_errc::no_state, "");35 static_assert(std::future_errc::promise_already_satisfied != std::future_errc::no_state, "");36 37 static_assert(std::future_errc::broken_promise != static_cast<std::future_errc>(0), "");38 static_assert(std::future_errc::future_already_retrieved != static_cast<std::future_errc>(0), "");39 static_assert(std::future_errc::promise_already_satisfied != static_cast<std::future_errc>(0), "");40 static_assert(std::future_errc::no_state != static_cast<std::future_errc>(0), "");41 42 return 0;43}44