| /* Forward declarations for expected for -*- C++ -*- 14. | |
| Copyright (C) 2026 The GNU Toolchain Authors. | |
| This file is part of GCC. | |
| GCC is free software; you can redistribute it and/or modify it under | |
| the terms of the GNU General Public License as published by the Free | |
| Software Foundation; either version 3, or (at your option) any later | |
| version. | |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| for more details. | |
| You should have received a copy of the GNU General Public License | |
| along with GCC; see the file COPYING3. If not see | |
| <http://www.gnu.org/licenses/>. */ | |
| #ifndef GCC_EXPECTEDFWD | |
| #define GCC_EXPECTEDFWD 1 | |
| #include <type_traits> | |
| namespace gcc { | |
| template<typename E> | |
| struct unexpected; | |
| template<typename T, typename E, | |
| // Not for use. | |
| bool is_void = std::is_void<T>::value> | |
| struct [[nodiscard]] expected; | |
| } // namespace gcc | |
| #endif // GCC_EXPECTEDFWD |