Kirishni boshqarish

Swift kirishni boshqarish (access control)

Tiplar va a’zolarning ko‘rinuvchanligini public, internal, fileprivate va private bilan cheklang.

Darajalar

Swift’ning standart sozlamalari tabiatan xavfsiz: standart daraja — internal.

Sintaksis:

• public (boshqa modullarga ko‘rinadi)
• internal (faqat modul ichida, standart)
• fileprivate (shu fayl)
• private (shu ko‘rinish sohasidagi tip/kengaytma)

public struct APIClient {
  public init() {}
  public func request() {}
}

struct Repository { // internal by default
  fileprivate var cache: [String: String] = [:]
  private func reset() { cache.removeAll() }
}

Ushbu misolda public API’lar, modul ichidagi tip, fayl darajasidagi xususiyat va private yordamchi funksiya ko‘rsatilgan.

Tiplar va a’zolar

A’zo o‘zini o‘rab turgan tipdan ko‘proq ko‘rinuvchan bo‘lishi mumkin emas.

Sintaksis:

• public struct S { internal var x: Int } (to‘g‘ri)
• lekin internal struct S { public var x: Int } emas

internal struct Box { // whole type is internal
  public var value: Int // warning/error: member more visible than type
}

A’zolarning ko‘rinuvchanligi o‘z tipinikidan oshmasligi kerak; undan past yoki teng ko‘rinuvchanlikka ruxsat beriladi.