[swift-evolution] Selector for current method

[Rudolf Adamkovič]

On 14 Nov 2016, at 01:01, Robert Widmann <devteam.codafi at gmail.com> wrote:
> 
> NSSelectorFromString(#function) works just fine for this already.

Hi Robert,

it doesn’t work.

NSSelectorFromString(#function)
… returns "contentsOfDirectory(at:includingPropertiesForKeys:options:)"

#selector(DirectoryListingMock.contentsOfDirectory(at:includingPropertiesForKeys:options:))
… returns "contentsOfDirectoryAt:includingPropertiesForKeys:options:error:"

In other words, "NSSelectorFromString(#function)” returns Swift function name, not selector like _cmd or #selector does.

R+

> 
>> On Nov 13, 2016, at 6:50 PM, Rudolf Adamkovič via swift-evolution <swift-evolution at 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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>