CVarArgType

Instances of conforming types can be encoded, and appropriately passed, as elements of a C va_list.

This protocol is useful in presenting C "varargs" APIs natively in Swift. It only works for APIs that have a va_list variant, so for example, it isn't much use if all you have is:

  • int f(int n, ...)

Given a version like this, though, :

  • int f(int, va_list arguments)

you can write:

  • func swiftF(x: Int, arguments: CVarArgType...) -> Int {
  •   return withVaList(arguments) { f(x, $0) }
  • }
Inheritance View Protocol Hierarchy →
Import
  • import Swift

Instance Methods

func encode() Required

Transform self into a series of machine words that can be appropriately interpreted by C varargs

Declaration

  • func encode() -> [Word]