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: c++03, c++11, c++14, c++17, c++20 10 11 // template<class E> unexpected(E) -> unexpected<E>; 12 13 #include <concepts> 14 #include <expected> 15 16 struct Foo{}; 17 18 static_assert(std::same_as<decltype(std::unexpected(5)), std::unexpected<int>>); 19 static_assert(std::same_as<decltype(std::unexpected(Foo{})), std::unexpected<Foo>>); 20 static_assert(std::same_as<decltype(std::unexpected(std::unexpected<int>(5))), std::unexpected<int>>); 21