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 device_or_resource_busy = int(std::errc::device_or_resource_busy),
42 directory_not_empty = int(std::errc::directory_not_empty),
43 executable_format_error = int(std::errc::executable_format_error),
44 file_exists = int(std::errc::file_exists),
45 file_too_large = int(std::errc::file_too_large),
46 filename_too_long = int(std::errc::filename_too_long),
47 function_not_supported = int(std::errc::function_not_supported),
48 illegal_byte_sequence = int(std::errc::illegal_byte_sequence),
49 inappropriate_io_control_operation =
50 int(std::errc::inappropriate_io_control_operation),
51 interrupted = int(std::errc::interrupted),
52 invalid_argument = int(std::errc::invalid_argument),
53 invalid_seek = int(std::errc::invalid_seek),
54 io_error = int(std::errc::io_error),
55 is_a_directory = int(std::errc::is_a_directory),
56 no_child_process = int(std::errc::no_child_process),
57 no_lock_available = int(std::errc::no_lock_available),
58 no_space_on_device = int(std::errc::no_space_on_device),
59 no_such_device_or_address = int(std::errc::no_such_device_or_address),
60 no_such_device = int(std::errc::no_such_device),
61 no_such_file_or_directory = int(std::errc::no_such_file_or_directory),
62 no_such_process = int(std::errc::no_such_process),
63 not_a_directory = int(std::errc::not_a_directory),
64 not_enough_memory = int(std::errc::not_enough_memory),
65 not_supported = int(std::errc::not_supported),
66 operation_not_permitted = int(std::errc::operation_not_permitted),
67 permission_denied = int(std::errc::permission_denied),
68 read_only_file_system = int(std::errc::read_only_file_system),
69 resource_deadlock_would_occur = int(std::errc::resource_deadlock_would_occur),
70 resource_unavailable_try_again =
71 int(std::errc::resource_unavailable_try_again),
72 result_out_of_range = int(std::errc::result_out_of_range),
73 too_many_files_open_in_system = int(std::errc::too_many_files_open_in_system),
74 too_many_files_open = int(std::errc::too_many_files_open),
75 too_many_links = int(std::errc::too_many_links)
76 };
77
make_error_code(errc E)78 inline std::error_code make_error_code(errc E) {
79 return std::error_code(static_cast<int>(E), std::generic_category());
80 }
81 }
82
83 namespace std {
84 template <> struct is_error_code_enum<llvm::errc> : std::true_type {};
85 }
86 #endif
87