Generalized accessors

Transcript

1. subscrit get set

2. get let nums = Array(0..<10) let x10 = nums[3] *

   10 // `get` print(num) subscript(index: Int) -> Element { get { let element = // `index` return element // } set { ... } }

3. set var nums = Array(0..<10) let num = nums[3] nums[3]

   = num * 10 // `set` print(num) subscript(index: Int) -> Element { get { ... } set(newValue) { // `newValue` // buffer = newValue } }

4. Swift 4.2 mutableAddressWithPinnedNativeOwner Swift 5 read , modify yield co-routine

5. read // CoreAudio.swift subscript(index: Index) -> Element { _read {

   yield ((_audioBuffersPointer + index).pointee) } } modify // Array.swift subscript(index: Int) -> Element { _modify { let address = _buffer.subscriptBaseAddress + index yield &address.pointee } }

6. yield subscript(index: Int) -> inout Element {} inout Rust Lifetime

   Rust Swift

7. yield

8. !