It doesn't seem to handle some pretty basic swift code:
var a = 3
let b = { a * 2 }()
var a = 3
let b = { a * 2 }()
var a = 1 ^ 2
for i in 0...10 { print(i) }
Then again, the project does say it's in early development. Perhaps a re-visit in a month or two will yield some nice progress.