Interfeys yoki protokolda metodning standart bajarilishini belgilash mumkinmi?

Swift'da protokollar kengaytmalar (extensions) orqali standart usullarning amalga oshirilishini o'z ichiga olishi mumkin. Bu protokol usullari uchun standart xulqni belgilash imkonini beradi va uni aniq tiplarda qayta yozish mumkin.

Misol:

protocol Greetable {
    func greet()
}

extension Greetable {
    func greet() {
        print("Standart salom")
    }
}

struct Person: Greetable {}

let p = Person()
p.greet() // Chiqaradi: Standart salom

Shunday qilib, standart amalga oshirish protokolning o'zida emas, uning kengaytmasida belgilangan.