Hi Jordan,
> The stripped-down code seems like it could use any unique key, including
> #function.
That would work only if #function could be used with an argument just like
#selector:
class DirectoryListingStub: DirectoryListing {
var cannedOutput: [Selector: Any?] = [
#function(contentsOfDirectory(at:includingPropertiesForKeys:options:)):
nil
]
func contentsOfDirectory(at url: URL, includingPropertiesForKeys keys:
[URLResourceKey]?, options: FileManager.DirectoryEnumerationOptions) throws ->
[URL] {
return cannedOutput[#function] as! [URL]
}
}
Obviously, this doesn’t work as #function takes no arguments.
There's no way to get #selector for the current method. And there’s no way to
get #function for arbitrary method.
R+
> On 14 Nov 2016, at 20:07, Jordan Rose <jordan_r...@apple.com> wrote:
>
> This doesn’t seem unreasonable, but I’m not sure if that makes it reasonable.
> :-) What’s your use case? The stripped-down code seems like it could use any
> unique key, including #function.
>
> Jordan
>
>
>> On Nov 13, 2016, at 15:50, Rudolf Adamkovič via swift-evolution
>> <swift-evolution@swift.org> wrote:
>>
>> Hi there!
>>
>> in Swift 3, we now have #selector and #keyPath yet there’s still no _cmd
>> like we have in Objective-C.
>>
>> Example:
>>
>> class DirectoryListingStub: DirectoryListing {
>>
>> var cannedOutput: [Selector: Any?] = [
>>
>> #selector(contentsOfDirectory(at:includingPropertiesForKeys:options:)): nil
>> ]
>>
>> dynamic func contentsOfDirectory(at url: URL, includingPropertiesForKeys
>> keys: [URLResourceKey]?, options: FileManager.DirectoryEnumerationOptions)
>> throws -> [URL] {
>> let selector =
>> #selector(contentsOfDirectory(at:includingPropertiesForKeys:options:))
>> return cannedOutput[selector] as! [URL]
>> }
>>
>> }
>>
>> Problem: I had to specify #selector twice.
>>
>> I though I’d be able to use #function but:
>>
>> #selector = contentsOfDirectoryAt:includingPropertiesForKeys:options:error:
>> #function = contentsOfDirectory(at:includingPropertiesForKeys:options:)
>>
>> It’d be great if #selector (without arguments) returned the current selector.
>>
>> Or am I missing something?
>>
>> R+
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>> swift-evolution mailing list
>> swift-evolution@swift.org
>> https://lists.swift.org/mailman/listinfo/swift-evolution
>
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