Hi everybody, I do agree with Kevin : trailing closures is only a possibility offered by the language, you are not forced to use it. In the case you show, I agree that the second syntax is more readable than the first one. Good news is : it does compile :-).
I think adding a specific keyword or annotation to locally forbid trailing closure would add complexity to the language for no real advantage. -1 for me thus. Jerome > On 04 Jan 2016, at 19:52, Kevin Ballard via swift-evolution > <[email protected]> wrote: > > What's the point of this? What problem does it solve? If you don't want a > trailing closure, just don't use trailing closure syntax. I don't see what > benefit there is in explicitly annotating the function to disallow trailing > closure syntax with it; just because you don't want to use trailing closure > syntax doesn't mean nobody should be able to use it. And other people using > it shouldn't affect you. > > -Kevin Ballard > > On Mon, Jan 4, 2016, at 04:45 AM, QQ Mail via swift-evolution wrote: >> Hi, All: >> trailing closure is good for most cases, but sometimes it is also make code >> unclear, for example: >> >> UIView.animateWithDuration(0.3, animations: { () -> Void in >> // animation code here >> }) { (Bool) -> Void in >> // completion code here >> } >> >> the label been removed and the code also not aligned well. >> I would like to write like this: >> >> UIView.animateWithDuration(0.3, >> >> animations: { () -> Void in >> // animation code here >> }, >> completion: { Bool -> Void in >> // completion code here >> } >> ) >> >> It is possible, just every time you have to write it manually. It’s a little >> wast. >> So I have a thought, since we already know this function is not well suit >> for trailing >> closure, can we add a attribute to disable it, for example: >> >> extensionUIView { >> >> @disable_trailing_closure >> public static func animateWithDuration(duration:NSTimeInterval, >> animations:()->Void, completion:()->Void) { >> // implementations ... >> } >> } >> >> I also found another one have issue for this too. link: >> http://www.natashatherobot.com/swift-trailing-closure-syntax/ >> <http://www.natashatherobot.com/swift-trailing-closure-syntax/> >> what do you think? >> >> Best Regards >> >> ChenYungui >> >> _______________________________________________ >> swift-evolution mailing list >> [email protected] <mailto:[email protected]> >> https://lists.swift.org/mailman/listinfo/swift-evolution >> <https://lists.swift.org/mailman/listinfo/swift-evolution> > > > _______________________________________________ > swift-evolution mailing list > [email protected] > https://lists.swift.org/mailman/listinfo/swift-evolution
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