| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // UNSUPPORTED: no-threads |
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| 10 | |
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| 11 | // LWG 2056 changed the values of future_errc, so if we're using new headers |
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| 12 | // with an old library we'll get incorrect messages. |
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| 13 | // |
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| 14 | // XFAIL: stdlib=apple-libc++ && target={{.+}}-apple-macosx10.{{9|10|11}} |
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| 15 | |
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| 16 | // VC Runtime's std::exception::what() method is not marked as noexcept, so |
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| 17 | // this fails. |
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| 18 | // UNSUPPORTED: target=x86_64-pc-windows-msvc |
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| 19 | |
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| 20 | // <future> |
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| 21 | // |
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| 22 | // class future_error |
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| 23 | // |
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| 24 | // const char* what() const noexcept; |
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| 25 | |
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| 26 | #include <cassert> |
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| 27 | #include <future> |
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| 28 | #include <string_view> |
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| 29 | #include <utility> |
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| 30 | |
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| 31 | #include "test_macros.h" |
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| 32 | |
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| 33 | int main(int, char**) { |
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| 34 | ASSERT_NOEXCEPT(std::declval<std::future_error const&>().what()); |
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| 35 | ASSERT_SAME_TYPE(decltype(std::declval<std::future_error const&>().what()), char const*); |
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| 36 | |
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| 37 | // Before C++17, we can't construct std::future_error directly in a standards-conforming way |
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| 38 | #if TEST_STD_VER >= 17 |
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| 39 | { |
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| 40 | std::future_error const f(std::future_errc::broken_promise); |
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| 41 | [[maybe_unused]] char const* what = f.what(); |
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| 42 | LIBCPP_ASSERT(what == std::string_view{"The associated promise has been destructed prior " |
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| 43 | "to the associated state becoming ready." }); |
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| 44 | } |
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| 45 | { |
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| 46 | std::future_error f(std::future_errc::future_already_retrieved); |
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| 47 | [[maybe_unused]] char const* what = f.what(); |
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| 48 | LIBCPP_ASSERT(what == std::string_view{"The future has already been retrieved from " |
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| 49 | "the promise or packaged_task." }); |
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| 50 | } |
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| 51 | { |
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| 52 | std::future_error f(std::future_errc::promise_already_satisfied); |
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| 53 | [[maybe_unused]] char const* what = f.what(); |
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| 54 | LIBCPP_ASSERT(what == std::string_view{"The state of the promise has already been set." }); |
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| 55 | } |
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| 56 | { |
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| 57 | std::future_error f(std::future_errc::no_state); |
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| 58 | [[maybe_unused]] char const* what = f.what(); |
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| 59 | LIBCPP_ASSERT(what == std::string_view{"Operation not permitted on an object without " |
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| 60 | "an associated state." }); |
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| 61 | } |
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| 62 | #endif |
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| 63 | |
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| 64 | return 0; |
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| 65 | } |
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| 66 | |
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