1 //===- llvm/Support/Errc.h - Defines the llvm::errc enum --------*- C++ -*-===// 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 // While std::error_code works OK on all platforms we use, there are some 10 // some problems with std::errc that can be avoided by using our own 11 // enumeration: 12 // 13 // * std::errc is a namespace in some implementations. That means that ADL 14 // doesn't work and it is sometimes necessary to write std::make_error_code 15 // or in templates: 16 // using std::make_error_code; 17 // make_error_code(...); 18 // 19 // with this enum it is safe to always just use make_error_code. 20 // 21 // * Some implementations define fewer names than others. This header has 22 // the intersection of all the ones we support. 23 // 24 // * std::errc is just marked with is_error_condition_enum. This means that 25 // common patterns like AnErrorCode == errc::no_such_file_or_directory take 26 // 4 virtual calls instead of two comparisons. 27 //===----------------------------------------------------------------------===// 28 29 #ifndef LLVM_SUPPORT_ERRC_H 30 #define LLVM_SUPPORT_ERRC_H 31 32 #include <system_error> 33 34 namespace llvm { 35 enum class errc { 36 argument_list_too_long = int(std::errc::argument_list_too_long), 37 argument_out_of_domain = int(std::errc::argument_out_of_domain), 38 bad_address = int(std::errc::bad_address), 39 bad_file_descriptor = int(std::errc::bad_file_descriptor), 40 broken_pipe = int(std::errc::broken_pipe), 41 // There is no delete_pending in std::errc; this error code is negative to 42 // avoid conflicts. This error roughly corresponds with Windows' 43 // STATUS_DELETE_PENDING 0xC0000056. 44 delete_pending = -56, 45 device_or_resource_busy = int(std::errc::device_or_resource_busy), 46 directory_not_empty = int(std::errc::directory_not_empty), 47 executable_format_error = int(std::errc::executable_format_error), 48 file_exists = int(std::errc::file_exists), 49 file_too_large = int(std::errc::file_too_large), 50 filename_too_long = int(std::errc::filename_too_long), 51 function_not_supported = int(std::errc::function_not_supported), 52 illegal_byte_sequence = int(std::errc::illegal_byte_sequence), 53 inappropriate_io_control_operation = 54 int(std::errc::inappropriate_io_control_operation), 55 interrupted = int(std::errc::interrupted), 56 invalid_argument = int(std::errc::invalid_argument), 57 invalid_seek = int(std::errc::invalid_seek), 58 io_error = int(std::errc::io_error), 59 is_a_directory = int(std::errc::is_a_directory), 60 no_child_process = int(std::errc::no_child_process), 61 no_lock_available = int(std::errc::no_lock_available), 62 no_space_on_device = int(std::errc::no_space_on_device), 63 no_such_device_or_address = int(std::errc::no_such_device_or_address), 64 no_such_device = int(std::errc::no_such_device), 65 no_such_file_or_directory = int(std::errc::no_such_file_or_directory), 66 no_such_process = int(std::errc::no_such_process), 67 not_a_directory = int(std::errc::not_a_directory), 68 not_enough_memory = int(std::errc::not_enough_memory), 69 not_supported = int(std::errc::not_supported), 70 operation_not_permitted = int(std::errc::operation_not_permitted), 71 permission_denied = int(std::errc::permission_denied), 72 read_only_file_system = int(std::errc::read_only_file_system), 73 resource_deadlock_would_occur = int(std::errc::resource_deadlock_would_occur), 74 resource_unavailable_try_again = 75 int(std::errc::resource_unavailable_try_again), 76 result_out_of_range = int(std::errc::result_out_of_range), 77 too_many_files_open_in_system = int(std::errc::too_many_files_open_in_system), 78 too_many_files_open = int(std::errc::too_many_files_open), 79 too_many_links = int(std::errc::too_many_links) 80 }; 81 82 inline std::error_code make_error_code(errc E) { 83 return std::error_code(static_cast<int>(E), std::generic_category()); 84 } 85 } 86 87 namespace std { 88 template <> struct is_error_code_enum<llvm::errc> : std::true_type {}; 89 } 90 #endif 91