Convert between CGFloat and String

CGFloat+LosslessStringConvertible.swift

//	Note:
//	When you found that you cannot cast/convert between CGFloat and String, you may add following piece of code
//	to make your life a bit easier.
//
//		if let number = CGFloat("1234.5") {
//		}
//		let string = String(CGFloat.pi)
//

extension CGFloat: LosslessStringConvertible {
	public init?(_ description: String) {
		if let number = Double(description) { self = CGFloat(number) }
		else { return nil }
	}
}