| // -*- C++ -*- |
| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| #ifndef _LIBCPP___EXPECTED_BAD_EXPECTED_ACCESS_H |
| #define _LIBCPP___EXPECTED_BAD_EXPECTED_ACCESS_H |
| |
| #include <__config> |
| #include <__exception/exception.h> |
| #include <__utility/move.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| #if _LIBCPP_STD_VER >= 23 |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Err> |
| class bad_expected_access; |
| |
| template <> |
| class bad_expected_access<void> : public exception { |
| protected: |
| _LIBCPP_HIDE_FROM_ABI bad_expected_access() noexcept = default; |
| _LIBCPP_HIDE_FROM_ABI bad_expected_access(const bad_expected_access&) = default; |
| _LIBCPP_HIDE_FROM_ABI bad_expected_access(bad_expected_access&&) = default; |
| _LIBCPP_HIDE_FROM_ABI bad_expected_access& operator=(const bad_expected_access&) = default; |
| _LIBCPP_HIDE_FROM_ABI bad_expected_access& operator=(bad_expected_access&&) = default; |
| _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~bad_expected_access() override = default; |
| |
| public: |
| // The way this has been designed (by using a class template below) means that we'll already |
| // have a profusion of these vtables in TUs, and the dynamic linker will already have a bunch |
| // of work to do. So it is not worth hiding the <void> specialization in the dylib, given that |
| // it adds deployment target restrictions. |
| _LIBCPP_HIDE_FROM_ABI_VIRTUAL const char* what() const noexcept override { return "bad access to std::expected"; } |
| }; |
| |
| template <class _Err> |
| class bad_expected_access : public bad_expected_access<void> { |
| public: |
| _LIBCPP_HIDE_FROM_ABI explicit bad_expected_access(_Err __e) : __unex_(std::move(__e)) {} |
| |
| _LIBCPP_HIDE_FROM_ABI _Err& error() & noexcept { return __unex_; } |
| _LIBCPP_HIDE_FROM_ABI const _Err& error() const& noexcept { return __unex_; } |
| _LIBCPP_HIDE_FROM_ABI _Err&& error() && noexcept { return std::move(__unex_); } |
| _LIBCPP_HIDE_FROM_ABI const _Err&& error() const&& noexcept { return std::move(__unex_); } |
| |
| private: |
| _Err __unex_; |
| }; |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP_STD_VER >= 23 |
| |
| #endif // _LIBCPP___EXPECTED_BAD_EXPECTED_ACCESS_H |