Adaptable.swift

//
//  Adaptable.swift
//
//  Created by Jason Jobe on 5/2/17.
//  Copyright © 2017 WildThink. All rights reserved.
//

import Foundation

public protocol Adaptable {

    func canAdapt<T> (to: T.Type) -> Bool
    func adapt<T> (to: T.Type) -> T?
    func adapt<T> () -> T?
}

public extension Adaptable
{
    public func canAdapt<T> (to: T) -> Bool {
        return self is T
    }

    public func adapt<T> (to: T) -> T? {
        return self as? T
    }
    public func adapt<T> () -> T? {
        return self.adapt(to: T.self)
    }
}

// Example use
struct Wrapper {
    var name: String
}

struct Foo: Adaptable {
    var name: String = "fred"

    public func adapt<T> (to: T.Type) -> T? {
        if  T.self is Wrapper.Type {
            return Wrapper (name: "wrap \(name)") as? T
        }
        return self as? T
    }
    public func adapt<T> () -> T? {
        return self.adapt(to: T.self) as? T
    }
}