ARCore 是否具有 ARKit 的 "guard let planeAnchor" 语义等价物？

Question

我想知道ARCore/Kotlin中是否有类似ARKit/Swift中的guard let语句的语义结构？

let anchor: ARAnchor?

guard let planeAnchor = anchor as? ARPlaneAnchor else { 
    print("condition not met")
    return 
}

Answer 1

我想我已经找到了 ARCore 的 planeAnchor 与 Elvis 运算符 和 safe cast 运算符 所需的语义：

public class CenterPosePlaneAnchor { ... }

val anchor: Anchor?
val info = "condition not met"

val planeAnchor = anchor as? CenterPosePlaneAnchor ?: return println(info)