Does Swift support implicit conversion?

Question

For example, I have the following code:

    let numberOfBlocks = 3
    let blockWidth = SKSpriteNode(imageNamed: \"image.png\").size.width
    let padding =          


        

Answer 1

Swift doesn't support implicitly cast anymore in Xcode6 GM. Following answer only apply to Xcode6 beta version.

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I don't want to talk about implicitly cast is good or bad, but you can have it if you really want with __conversion()

e.g. If you need UInt8 and Int be able to convert from Double

extension Double {
    func __conversion() -> UInt8 { return UInt8(self) }
    func __conversion() -> Int { return Int(self) }
    // add more if you need to
}

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xcrun swift
Welcome to Swift!  Type :help for assistance.
  1> extension Double {
  2.     func __conversion() -> UInt8 { return UInt8(self) }
  3. }
  4> var d = 1.0
d: Double = 1
  5> var u8 : UInt8 = d
u8: UInt8 = 1
  6>

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Note: I won't put this in my production code. I only want to point out it if possible but not recommending it.