mirror of
https://github.com/apple/swift.git
synced 2025-12-21 12:14:44 +01:00
fd27530199
Provide an _ObjectiveCBridgeableErrorType protocol, which requires a failable initializer that attempts to map an NSError to a value of the error type. To start things off, gyb up an _NSCocoaError enum (underscored because we need to bikeshed a naming scheme) that corresponds to the standard NSCocoaErrorDomain codes. Swift SVN r26820
117 lines
3.0 KiB
Plaintext
117 lines
3.0 KiB
Plaintext
import Foundation
|
|
import CoreFoundation
|
|
|
|
// NSError and CFError conform to the standard ErrorType protocol. Compiler
|
|
// magic allows this to be done as a "toll-free" conversion when an NSError
|
|
// or CFError is used as an ErrorType existential.
|
|
|
|
extension NSError: _ErrorType {}
|
|
|
|
extension CFError: _ErrorType {
|
|
public var domain: String {
|
|
return CFErrorGetDomain(self) as String
|
|
}
|
|
|
|
public var code: Int {
|
|
return CFErrorGetCode(self)
|
|
}
|
|
}
|
|
|
|
/// An internal protocol to represent Swift error enums that map to standard
|
|
/// Cocoa NSError domains.
|
|
protocol _ObjectiveCBridgeableErrorType: _ErrorType {
|
|
/// Produce a value of the error type corresponding to the given NSError,
|
|
/// or return nil if it cannot be bridged.
|
|
init?(_bridgedNSError: NSError)
|
|
}
|
|
|
|
%{
|
|
|
|
# Cocoa domains and their mapping information.
|
|
mappedDomains = {
|
|
'NSCocoaError': [
|
|
# TODO: Split this up into subdomains based on the Minimum/Maximum
|
|
# delimited ranges?
|
|
'NSFileNoSuchFileError',
|
|
'NSFileLockingError',
|
|
'NSFileReadUnknownError',
|
|
'NSFileReadNoPermissionError',
|
|
'NSFileReadInvalidFileNameError',
|
|
'NSFileReadCorruptFileError',
|
|
'NSFileReadNoSuchFileError',
|
|
'NSFileReadInapplicableStringEncodingError',
|
|
'NSFileReadUnsupportedSchemeError',
|
|
'NSFileReadTooLargeError',
|
|
'NSFileReadUnknownStringEncodingError',
|
|
'NSFileWriteUnknownError',
|
|
'NSFileWriteNoPermissionError',
|
|
'NSFileWriteInvalidFileNameError',
|
|
'NSFileWriteFileExistsError',
|
|
'NSFileWriteInapplicableStringEncodingError',
|
|
'NSFileWriteUnsupportedSchemeError',
|
|
'NSFileWriteOutOfSpaceError',
|
|
'NSFileWriteVolumeReadOnlyError',
|
|
'NSKeyValueValidationError',
|
|
'NSFormattingError',
|
|
'NSUserCancelledError',
|
|
#'NSFileErrorMinimum',
|
|
#'NSFileErrorMaximum',
|
|
#'NSValidationErrorMinimum',
|
|
#'NSValidationErrorMaximum',
|
|
#'NSFormattingErrorMinimum',
|
|
#'NSFormattingErrorMaximum',
|
|
'NSPropertyListReadCorruptError',
|
|
'NSPropertyListReadUnknownVersionError',
|
|
'NSPropertyListReadStreamError',
|
|
'NSPropertyListWriteStreamError',
|
|
#'NSPropertyListErrorMinimum',
|
|
#'NSPropertyListErrorMaximum',
|
|
#'NSExecutableErrorMinimum',
|
|
'NSExecutableNotLoadableError',
|
|
'NSExecutableArchitectureMismatchError',
|
|
'NSExecutableRuntimeMismatchError',
|
|
'NSExecutableLoadError',
|
|
'NSExecutableLinkError',
|
|
#'NSExecutableErrorMaximum',
|
|
],
|
|
}
|
|
|
|
}%
|
|
|
|
%for domain in mappedDomains:
|
|
|
|
// TODO: API review for how to name these enums and cases.
|
|
%{
|
|
EnumName = "_" + domain
|
|
}%
|
|
|
|
enum ${EnumName}: _ObjectiveCBridgeableErrorType {
|
|
% for code in mappedDomains[domain]:
|
|
case ${code}
|
|
% end
|
|
|
|
var domain: String { return ${domain}Domain }
|
|
var code: Int {
|
|
switch self {
|
|
% for code in mappedDomains[domain]:
|
|
case ${EnumName}.${code}: return Foundation.${code}
|
|
% end
|
|
}
|
|
}
|
|
|
|
init?(_bridgedNSError: NSError) {
|
|
if _bridgedNSError.domain != ${domain}Domain {
|
|
return nil
|
|
}
|
|
|
|
switch _bridgedNSError.code {
|
|
% for code in mappedDomains[domain]:
|
|
case Foundation.${code}: self = ${EnumName}.${code}
|
|
% end
|
|
default: return nil
|
|
}
|
|
}
|
|
}
|
|
|
|
%end
|