Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Enumerations and Optionals in Swift Introduction to Enumerations Enums and Objects

Teri Dent
Teri Dent
11,515 Points

I don't know the source of this error

Every time I try to run this challenge I get this:

swift_lint.swift:41:1: error: expected declaration

^ swift_lint.swift:25:7: note: in declaration of 'Robot' class Robot {

No clue what it means...

test.swift
class Point {
    var x: Int
    var y: Int

    init(x: Int, y: Int) {
        self.x = x
        self.y = y
    }
}

enum Direction {
    case left
    case right
    case up
    case down
}

class Robot {
    var location: Point

    init() {
        self.location = Point(x: 0, y: 0)
    }

    func move(_ direction: Direction) {
        // Enter your code below
        switch direction {
          case Direction.up: return self.location.y += 1
          case Direction.down: return location.y -= 1
          case Direction.left: return location.x -= 1
          case Direction.right: return location.x += 1
    }
}

1 Answer

Tassia Castro
seal-mask
.a{fill-rule:evenodd;}techdegree
Tassia Castro
iOS Development Techdegree Student 9,170 Points

Hey Teri,

The error is pointing to the class Robot. The compiler is expecting declaration of 'Robot' because the braces were not closed.

class Point {
    var x: Int
    var y: Int

    init(x: Int, y: Int) {
        self.x = x
        self.y = y
    }
}

enum Direction {
    case left
    case right
    case up
    case down
}

class Robot {
    var location: Point

    init() {
        self.location = Point(x: 0, y: 0)
    }

    func move(_ direction: Direction) {
        // Enter your code below
        switch direction {
          case Direction.up: return self.location.y += 1
          case Direction.down: return location.y -= 1
          case Direction.left: return location.x -= 1
          case Direction.right: return location.x += 1
       } // this one is closing the switch
   } // this one is closing the function
}// I added this one to close the declaration of the class