[swift-evolution] [Pitch] Move @noescape
clattner at apple.com
Thu Mar 3 18:14:54 CST 2016
> On Mar 3, 2016, at 4:10 PM, Chris Lattner via swift-evolution <swift-evolution at swift.org> wrote:
>> On Mar 3, 2016, at 2:14 PM, Jacob Bandes-Storch <jtbandes at gmail.com <mailto:jtbandes at gmail.com>> wrote:
>> Will this allow me to write "let myDispatchSync = dispatch_sync as! @noescape () -> Void" ? :-D
> Yes, but you need to spell it like this:
> let myDispatchSync = dispatch_sync as! ((dispatch_queue_t, @noescape @convention(block) () -> ()) -> Void)
Ah, while this syntactically parses, but the cast is considered to fail at runtime given that it is not a safe conversion. This is the domain of an unsafe cast.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the swift-evolution