PATs-Dynamic-Dispatch-Generic.swift

struct AnyAnimal: Animal {
    
    let name: String
    private let walker: () -> Void
    private let eater: (Any) -> Void
    
    init<T: Animal>(_ animal: T) {
        name = animal.name
        
        walker = {
            animal.walk()
        }
        
        eater = { food in
            guard let f = food as? T.FoodType else { return }
            animal.eat(food: f)
        }
    }
    
    func walk() {
        walker()
    }
    
    func eat(food: Any) {
        eater(food)
    }
}