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d8b23109b2
While std::error_code itself seems to work OK in all platforms, there are few annoying differences with regards to the std::errc enumeration. This patch adds a simple llvm enumeration, which will hopefully avoid build breakages in other platforms and surprises as we get more uses of std::error_code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210920 91177308-0d34-0410-b5e6-96231b3b80d8
87 lines
3.7 KiB
C++
87 lines
3.7 KiB
C++
//===- llvm/Support/Errc.h - Defines the llvm::errc enum --------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// While std::error_code works OK on all platforms we use, there are some
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// some problems with std::errc that can be avoided by using our own
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// enumeration:
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//
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// * std::errc is a namespace in some implementations. That meas that ADL
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// doesn't work and it is sometimes necessary to write std::make_error_code
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// or in templates:
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// using std::make_error_code;
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// make_error_code(...);
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//
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// with this enum it is safe to always just use make_error_code.
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//
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// * Some implementations define fewer names than others. This header has
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// the intersection of all the ones we support.
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//
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// * std::errc is just marked with is_error_condition_enum. This means that
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// common patters like AnErrorCode == errc::no_such_file_or_directory take
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// 4 virtual calls instead of two comparisons.
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_ERRC_H
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#define LLVM_SUPPORT_ERRC_H
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#include <system_error>
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namespace llvm {
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enum class errc {
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argument_list_too_long = int(std::errc::argument_list_too_long),
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argument_out_of_domain = int(std::errc::argument_out_of_domain),
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bad_address = int(std::errc::bad_address),
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bad_file_descriptor = int(std::errc::bad_file_descriptor),
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broken_pipe = int(std::errc::broken_pipe),
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device_or_resource_busy = int(std::errc::device_or_resource_busy),
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directory_not_empty = int(std::errc::directory_not_empty),
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executable_format_error = int(std::errc::executable_format_error),
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file_exists = int(std::errc::file_exists),
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file_too_large = int(std::errc::file_too_large),
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filename_too_long = int(std::errc::filename_too_long),
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function_not_supported = int(std::errc::function_not_supported),
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illegal_byte_sequence = int(std::errc::illegal_byte_sequence),
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inappropriate_io_control_operation =
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int(std::errc::inappropriate_io_control_operation),
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interrupted = int(std::errc::interrupted),
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invalid_argument = int(std::errc::invalid_argument),
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invalid_seek = int(std::errc::invalid_seek),
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io_error = int(std::errc::io_error),
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is_a_directory = int(std::errc::is_a_directory),
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no_child_process = int(std::errc::no_child_process),
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no_lock_available = int(std::errc::no_lock_available),
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no_space_on_device = int(std::errc::no_space_on_device),
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no_such_device_or_address = int(std::errc::no_such_device_or_address),
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no_such_device = int(std::errc::no_such_device),
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no_such_file_or_directory = int(std::errc::no_such_file_or_directory),
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no_such_process = int(std::errc::no_such_process),
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not_a_directory = int(std::errc::not_a_directory),
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not_enough_memory = int(std::errc::not_enough_memory),
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operation_not_permitted = int(std::errc::operation_not_permitted),
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permission_denied = int(std::errc::permission_denied),
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read_only_file_system = int(std::errc::read_only_file_system),
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resource_deadlock_would_occur = int(std::errc::resource_deadlock_would_occur),
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resource_unavailable_try_again =
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int(std::errc::resource_unavailable_try_again),
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result_out_of_range = int(std::errc::result_out_of_range),
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too_many_files_open_in_system = int(std::errc::too_many_files_open_in_system),
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too_many_files_open = int(std::errc::too_many_files_open),
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too_many_links = int(std::errc::too_many_links)
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};
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inline std::error_code make_error_code(errc E) {
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return std::error_code(static_cast<int>(E), std::generic_category());
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}
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}
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namespace std {
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template <> struct is_error_code_enum<llvm::errc> : std::true_type {};
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}
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#endif
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