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annotate include/llvm/Support/Errc.h @ 125:56c5119fbcd2

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author mir3636
date Sun, 03 Dec 2017 20:09:16 +0900
parents 54457678186b
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1 //===- llvm/Support/Errc.h - Defines the llvm::errc enum --------*- C++ -*-===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // While std::error_code works OK on all platforms we use, there are some
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11 // some problems with std::errc that can be avoided by using our own
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12 // enumeration:
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13 //
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14 // * std::errc is a namespace in some implementations. That meas that ADL
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15 // doesn't work and it is sometimes necessary to write std::make_error_code
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16 // or in templates:
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17 // using std::make_error_code;
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18 // make_error_code(...);
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19 //
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20 // with this enum it is safe to always just use make_error_code.
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21 //
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22 // * Some implementations define fewer names than others. This header has
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23 // the intersection of all the ones we support.
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24 //
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25 // * std::errc is just marked with is_error_condition_enum. This means that
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26 // common patters like AnErrorCode == errc::no_such_file_or_directory take
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27 // 4 virtual calls instead of two comparisons.
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28 //===----------------------------------------------------------------------===//
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29
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30 #ifndef LLVM_SUPPORT_ERRC_H
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31 #define LLVM_SUPPORT_ERRC_H
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32
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33 #include <system_error>
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34
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35 namespace llvm {
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36 enum class errc {
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37 argument_list_too_long = int(std::errc::argument_list_too_long),
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38 argument_out_of_domain = int(std::errc::argument_out_of_domain),
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39 bad_address = int(std::errc::bad_address),
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40 bad_file_descriptor = int(std::errc::bad_file_descriptor),
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41 broken_pipe = int(std::errc::broken_pipe),
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42 device_or_resource_busy = int(std::errc::device_or_resource_busy),
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43 directory_not_empty = int(std::errc::directory_not_empty),
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44 executable_format_error = int(std::errc::executable_format_error),
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45 file_exists = int(std::errc::file_exists),
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46 file_too_large = int(std::errc::file_too_large),
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47 filename_too_long = int(std::errc::filename_too_long),
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48 function_not_supported = int(std::errc::function_not_supported),
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49 illegal_byte_sequence = int(std::errc::illegal_byte_sequence),
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50 inappropriate_io_control_operation =
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51 int(std::errc::inappropriate_io_control_operation),
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52 interrupted = int(std::errc::interrupted),
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53 invalid_argument = int(std::errc::invalid_argument),
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54 invalid_seek = int(std::errc::invalid_seek),
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55 io_error = int(std::errc::io_error),
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56 is_a_directory = int(std::errc::is_a_directory),
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57 no_child_process = int(std::errc::no_child_process),
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58 no_lock_available = int(std::errc::no_lock_available),
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59 no_space_on_device = int(std::errc::no_space_on_device),
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60 no_such_device_or_address = int(std::errc::no_such_device_or_address),
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61 no_such_device = int(std::errc::no_such_device),
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62 no_such_file_or_directory = int(std::errc::no_such_file_or_directory),
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63 no_such_process = int(std::errc::no_such_process),
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64 not_a_directory = int(std::errc::not_a_directory),
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65 not_enough_memory = int(std::errc::not_enough_memory),
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66 operation_not_permitted = int(std::errc::operation_not_permitted),
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67 permission_denied = int(std::errc::permission_denied),
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68 read_only_file_system = int(std::errc::read_only_file_system),
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69 resource_deadlock_would_occur = int(std::errc::resource_deadlock_would_occur),
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70 resource_unavailable_try_again =
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71 int(std::errc::resource_unavailable_try_again),
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72 result_out_of_range = int(std::errc::result_out_of_range),
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73 too_many_files_open_in_system = int(std::errc::too_many_files_open_in_system),
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74 too_many_files_open = int(std::errc::too_many_files_open),
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75 too_many_links = int(std::errc::too_many_links)
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76 };
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77
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78 inline std::error_code make_error_code(errc E) {
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79 return std::error_code(static_cast<int>(E), std::generic_category());
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80 }
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81 }
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82
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83 namespace std {
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84 template <> struct is_error_code_enum<llvm::errc> : std::true_type {};
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85 }
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86 #endif