How to fix warning?

[Igor-Poltavtsev]

Hi!
I get in line 66 this warning: "Operator should no longer be declared with body; use a precedence group instead".

How to fix it?

[DevAndArtist]

@iOS-altima

Quick but not tested update for Swift 3. It also does not support any way to release the instances. You could implement it yourself ;)

public protocol Instantiatable { init() }
fileprivate var instances = [String: Instantiatable]()

infix operator <~

extension Instantiatable {

	public static var shared: Self { return set { $0 } }

	public static func set(with setter: (Self) -> Self) -> Self {
		guard let instance = instances["\(self)"] as? Self else {
			return setInstance(self.init(), with: setter, overridable: true)
		}
		return setInstance(instance, with: setter, overridable: false)
	}

	private static func setInstance(_ instance: Self,
	                                with setter: (Self) -> Self,
	                                overridable: Bool) -> Self {
		let instance = restoreInstanceIfNeeded(instance1: instance,
		                                       instance2: setter(instance),
		                                       overridable: overridable)
		instances["\(self)"] = instance
		return instance
	}

	private static func restoreInstanceIfNeeded(instance1 i1: Self,
	                                            instance2 i2: Self,
	                                            overridable: Bool) -> Self {
		guard type(of: i1) is AnyClass else { return i2 }
		return ((i1 as AnyObject) !== (i2 as AnyObject)) && !overridable ? i1 : i2
	}
}

extension Instantiatable {

	public static var instance: Self.Type { return self }

	@discardableResult
	public static func <~ (type: Self.Type, newInstance: Self) -> Self {
		return type.set { _ in newInstance }
	}
}