Have you tried Go, Scala or Rust? All of those language are from their separate leagues, how can you compare swift with them?
Specifically, http://nondot.org/sabre/
> Of course, it also greatly benefited from the
> experiences hard-won by many other languages in the
> field, drawing ideas from Objective-C, Rust, Haskell,
> Ruby, Python, C#, CLU, and far too many others to list.