How to extend a protocol that satisfies Multiple Constraints - Swift 2.0

Question

I am trying to provide a default implementation of protocol so it can satisfy multiple constraints from other protocols.

Given the following protocols:

public protocol Creature {
    var name: String { get }
    var canMove: Bool { get }
}

public protocol Animal: Creature {}

public protocol Moveable {
    var movingSpeed: Double { get set }
}

public protocol Agend {
    var aged: Int { get }
}

I'm able to extend using a single condition on Self:

// all animals can move
extension Moveable where Self: Animal {
    public var canMove: Bool { return true }
}

But how do I set constraints to provide a default Moveable implementation for types that conform to both Animal and Aged protocols? Something like below? Or is there some "add" "or" option for the where clause?

// Pseudocode which doesn't work
extension Moveable where Self: Animal && Self: Aged {
    public var canMove: Bool { return true }
}

Answer 1

You could use a protocol composition:

extension Moveable where Self: protocol<Animal, Aged> {
    // ... 
}

Or just add the conformances one after the other:

extension Moveable where Self: Animal, Self: Aged {
    // ... 
}