I hit this issue as well. I had an early email on this list regarding do this topic, not in a situation to search for it. It is a short coming in how escaping can be applied to things like optional closures.<br><br>I was in the process of authoring an email for swift evolution about it and haven't yet gotten around to filing a defect about it.<br><br>-Shawn<br><div class="gmail_quote"><div dir="ltr">On Tue, Sep 13, 2016 at 7:27 PM Rick Mann via swift-users <<a href="mailto:swift-users@swift.org">swift-users@swift.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I'm trying to write this function. The errorHandler: parameter is modeled after the NSFileManager enumerate() function. If I include the @escaping you see there, I get the error "@escaping may only be applied to parameters of function type".<br>
<br>
The second parameter, iterator:, seems to have no problems with @escaping.<br>
<br>
func<br>
iterate(directory inURL: URL?,<br>
includingPropertiesForKeys: [URLResourceKey]? = nil,<br>
options: FileManager.DirectoryEnumerationOptions = [],<br>
errorHandler inErrorHandler: (@escaping (URL, Error) -> Bool)? = nil,<br>
iterator inIterator: (@escaping (URL) throws -> ())) rethrows<br>
{<br>
}<br>
<br>
I'm not sure why I can't apply @escaping here. Can anyone enlighten me? Thank you.<br>
<br>
--<br>
Rick Mann<br>
<a href="mailto:rmann@latencyzero.com" target="_blank">rmann@latencyzero.com</a><br>
<br>
<br>
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</blockquote></div>