正如问题所述,编译和运行下面的 2 个文件会使编译器无限期挂起。这是我尝试过的 CLI 命令:
swiftc *.swift -o combined && ./combined
和cat *.swift | swift -
.
目录中仅有的 2 个 swift 文件是main.swift
和Vehicle.swift
.
我试过分别编译和运行这两个文件,Vehicle.class
没有错误并且编译正确,main.swift
有error: cannot find 'Vehicle' in scope
错误,这是可以理解的,因为我需要一起编译它们。编译器没有其他反馈。什么会导致编译器挂起?
代码:
main.swift
// Stub program to demonstrate the Vehicle class
let vehicle1 = Vehicle(newNumOfDoors: 4, newMaxSpeed: 150,
newLicensePlate: "ASDF404", newColour: "Red")
vehicle1.licensePlate = "FGHJ968"
vehicle1.colour = "Green"
vehicle1.accelerate(accelerateBy: 60)
print("\nLicense Plate: " + vehicle1.licensePlate
+ "\nColour: " + vehicle1.colour
+ "\nNumber of Doors: " + vehicle1.numOfDoors
+ "\nMax Speed: " + vehicle1.maxSpeed
+ "\nCurrent Speed: " + vehicle1.speed)
车辆.swift
public class Vehicle {
// Properties Declaration
let numOfDoors: Int
let maxSpeed: Int
private(set) var speed: Int
var licensePlate: String
var colour: String
// Initializes a Vehicle
init (newNumOfDoors: Int, newMaxSpeed: Int,
newLicensePlate: String, newColour: String) {
self.numOfDoors = newNumOfDoors
self.licensePlate = newLicensePlate
self.maxSpeed = newMaxSpeed
self.colour = newColour
self.speed = 0
}
func accelerate(accelerateBy: Int) {
self.speed += accelerateBy
}
func brake(brakeBy: Int) {
self.speed -= brakeBy
}
}