1e356f681SHui Xie //===----------------------------------------------------------------------===// 2*6a54dfbfSLouis Dionne // 3e356f681SHui Xie // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4e356f681SHui Xie // See https://llvm.org/LICENSE.txt for license information. 5e356f681SHui Xie // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6e356f681SHui Xie // 7e356f681SHui Xie //===----------------------------------------------------------------------===// 8e356f681SHui Xie 9e356f681SHui Xie // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20 10e356f681SHui Xie 11e356f681SHui Xie // template<class E> unexpected(E) -> unexpected<E>; 12e356f681SHui Xie 13e356f681SHui Xie #include <concepts> 14e356f681SHui Xie #include <expected> 15e356f681SHui Xie 16e356f681SHui Xie struct Foo{}; 17e356f681SHui Xie 18e356f681SHui Xie static_assert(std::same_as<decltype(std::unexpected(5)), std::unexpected<int>>); 19e356f681SHui Xie static_assert(std::same_as<decltype(std::unexpected(Foo{})), std::unexpected<Foo>>); 20e356f681SHui Xie static_assert(std::same_as<decltype(std::unexpected(std::unexpected<int>(5))), std::unexpected<int>>); 21