打字比赛 - Swift编程打字练习

as associativity break case catch class continue default defer do

else enum extension fallthrough false fileprivate finally for func

get guard if import in infix init inout internal is lazy left

let mutating nil none nonmutating open operator optional override

postfix precedence prefix private protocol public repeat required

return right self set static struct subscript super switch throw

true try typealias typeof var where while