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1// -*- C++ -*-2//===----------------------------------------------------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9#ifndef _LIBCPP___EXPECTED_BAD_EXPECTED_ACCESS_H10#define _LIBCPP___EXPECTED_BAD_EXPECTED_ACCESS_H11 12#include <__config>13#include <__exception/exception.h>14#include <__utility/move.h>15 16#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)17# pragma GCC system_header18#endif19 20_LIBCPP_PUSH_MACROS21#include <__undef_macros>22 23#if _LIBCPP_STD_VER >= 2324 25_LIBCPP_BEGIN_NAMESPACE_STD26 27template <class _Err>28class bad_expected_access;29 30_LIBCPP_DIAGNOSTIC_PUSH31# if !_LIBCPP_AVAILABILITY_HAS_BAD_EXPECTED_ACCESS_KEY_FUNCTION32_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wweak-vtables")33# endif34template <>35class _LIBCPP_EXPORTED_FROM_ABI bad_expected_access<void> : public exception {36protected:37 _LIBCPP_HIDE_FROM_ABI bad_expected_access() noexcept = default;38 _LIBCPP_HIDE_FROM_ABI bad_expected_access(const bad_expected_access&) noexcept = default;39 _LIBCPP_HIDE_FROM_ABI bad_expected_access(bad_expected_access&&) noexcept = default;40 _LIBCPP_HIDE_FROM_ABI bad_expected_access& operator=(const bad_expected_access&) noexcept = default;41 _LIBCPP_HIDE_FROM_ABI bad_expected_access& operator=(bad_expected_access&&) noexcept = default;42 _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~bad_expected_access() override = default;43 44public:45# if _LIBCPP_AVAILABILITY_HAS_BAD_EXPECTED_ACCESS_KEY_FUNCTION46 const char* what() const noexcept override;47# else48 _LIBCPP_HIDE_FROM_ABI_VIRTUAL const char* what() const noexcept override { return "bad access to std::expected"; }49# endif50};51_LIBCPP_DIAGNOSTIC_POP52 53template <class _Err>54class bad_expected_access : public bad_expected_access<void> {55public:56 _LIBCPP_HIDE_FROM_ABI explicit bad_expected_access(_Err __e) : __unex_(std::move(__e)) {}57 58 _LIBCPP_HIDE_FROM_ABI _Err& error() & noexcept { return __unex_; }59 _LIBCPP_HIDE_FROM_ABI const _Err& error() const& noexcept { return __unex_; }60 _LIBCPP_HIDE_FROM_ABI _Err&& error() && noexcept { return std::move(__unex_); }61 _LIBCPP_HIDE_FROM_ABI const _Err&& error() const&& noexcept { return std::move(__unex_); }62 63private:64 _Err __unex_;65};66 67_LIBCPP_END_NAMESPACE_STD68 69#endif // _LIBCPP_STD_VER >= 2370 71_LIBCPP_POP_MACROS72 73#endif // _LIBCPP___EXPECTED_BAD_EXPECTED_ACCESS_H74