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Differential D145095 Diff 504453 libcxx/include/__exception/exception_ptr.h

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libcxx/include/__exception/exception_ptr.h

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				//===----------------------------------------------------------------------===//
				//
				// 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___EXCEPTION_EXCEPTION_PTR_H
				#define _LIBCPP___EXCEPTION_EXCEPTION_PTR_H

				#include <__config>
				#include <__exception/operations.h>
				#include <cstddef>
				#include <cstdlib>

				#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
				# pragma GCC system_header
				#endif

				namespace std { // purposefully not using versioning namespace

				#ifndef _LIBCPP_ABI_MICROSOFT

				class _LIBCPP_TYPE_VIS exception_ptr {
				void* __ptr_;

				public:
				_LIBCPP_HIDE_FROM_ABI exception_ptr() _NOEXCEPT : __ptr_() {}
				_LIBCPP_HIDE_FROM_ABI exception_ptr(nullptr_t) _NOEXCEPT : __ptr_() {}

				exception_ptr(const exception_ptr&) _NOEXCEPT;
				exception_ptr& operator=(const exception_ptr&) _NOEXCEPT;
				~exception_ptr() _NOEXCEPT;

				_LIBCPP_HIDE_FROM_ABI explicit operator bool() const _NOEXCEPT { return __ptr_ != nullptr; }

				friend _LIBCPP_HIDE_FROM_ABI bool operator==(const exception_ptr& __x, const exception_ptr& __y) _NOEXCEPT {
				return __x.__ptr_ == __y.__ptr_;
				}

				friend _LIBCPP_HIDE_FROM_ABI bool operator!=(const exception_ptr& __x, const exception_ptr& __y) _NOEXCEPT {
				return !(__x == __y);
				}

				friend _LIBCPP_FUNC_VIS exception_ptr current_exception() _NOEXCEPT;
				friend _LIBCPP_FUNC_VIS void rethrow_exception(exception_ptr);
				};

				template <class _Ep>
				_LIBCPP_HIDE_FROM_ABI exception_ptr make_exception_ptr(_Ep __e) _NOEXCEPT {
				# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
				try {
				throw __e;
				} catch (...) {
				return current_exception();
				}
				# else
				((void)__e);
				std::abort();
				# endif
				}

				#else // _LIBCPP_ABI_MICROSOFT

				class _LIBCPP_TYPE_VIS exception_ptr {
				_LIBCPP_DIAGNOSTIC_PUSH
				_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wunused-private-field")
				void* __ptr1_;
				void* __ptr2_;
				_LIBCPP_DIAGNOSTIC_POP

				public:
				exception_ptr() _NOEXCEPT;
				exception_ptr(nullptr_t) _NOEXCEPT;
				exception_ptr(const exception_ptr& __other) _NOEXCEPT;
				exception_ptr& operator=(const exception_ptr& __other) _NOEXCEPT;
				exception_ptr& operator=(nullptr_t) _NOEXCEPT;
				~exception_ptr() _NOEXCEPT;
				explicit operator bool() const _NOEXCEPT;
				};

				_LIBCPP_FUNC_VIS bool operator==(const exception_ptr& __x, const exception_ptr& __y) _NOEXCEPT;

				inline _LIBCPP_HIDE_FROM_ABI bool operator!=(const exception_ptr& __x, const exception_ptr& __y) _NOEXCEPT {
				return !(__x == __y);
				}

				_LIBCPP_FUNC_VIS void swap(exception_ptr&, exception_ptr&) _NOEXCEPT;

				_LIBCPP_FUNC_VIS exception_ptr __copy_exception_ptr(void* __except, const void* __ptr);
				_LIBCPP_FUNC_VIS exception_ptr current_exception() _NOEXCEPT;
				_LIBCPP_NORETURN _LIBCPP_FUNC_VIS void rethrow_exception(exception_ptr);

				// This is a built-in template function which automagically extracts the required
				// information.
				template <class _E>
				void* __GetExceptionInfo(_E);

				template <class _Ep>
				_LIBCPP_HIDE_FROM_ABI exception_ptr make_exception_ptr(_Ep __e) _NOEXCEPT {
				return __copy_exception_ptr(std::addressof(__e), __GetExceptionInfo(__e));
				}

				#endif // _LIBCPP_ABI_MICROSOFT
				} // namespace std

				#endif // _LIBCPP___EXCEPTION_EXCEPTION_PTR_H