lorentey

//: Playground - noun: a place where people can play

import UIKit

protocol MagicProtocol {
}
extension MagicProtocol {
    mutating func magic(xyzzy: Self) {
        // Mutating methods defined in a protocol extension can mutate `self` even if
        // the protocol is implemented by a class. 

lorentey

public func <<(num: Double, exp: Int) -> Double {
  return num * Double(1 << exp)
}

let s = (0.5 << 5) - 1
print(s)

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extension Array where Element: Comparable {
  func clamp(from lowerBound: Element, to upperBound: Element) -> Array {
    return self.map { min(upperBound, max(lowerBound, $0)) }
  }
}

let clamped = [0, 1, 2, 3, 4, 5, 6].clamp(from: 2, to: 4))

lorentey

### Keybase proof

I hereby claim:

  * I am lorentey on github.
  * I am lorentey (https://keybase.io/lorentey) on keybase.
  * I have a public key whose fingerprint is 086D 2046 8C31 E936 754F  C0C7 E9EA 32A8 0FB2 7A3F

To claim this, I am signing this object:

lorentey

protocol Sink {
    func receive()
}

protocol Source {
    associatedtype Value

    func subscribe(_ sink: Sink) -> Int
    func unsubscribe(_ token: Int)

lorentey

protocol Sink {
    associatedtype Value
    func receive(_ value: Value)
}

// This assumes Generalized Existentials are a thing
// https://github.com/apple/swift/blob/master/docs/GenericsManifesto.md#generalized-existentials
typealias AnySink<Value> = Any<Sink where .Value == Value>

protocol Source {

lorentey

import Foundation

@objc class Person: NSObject {
    var _firstName: String = "John"
    var _lastName: String = "Smith"
    dynamic var firstName: String { get { return _firstName } set { _firstName = newValue } }
    dynamic var lastName: String { get { return _lastName } set { _lastName = newValue } }

    dynamic var name: String { return "\(firstName) \(lastName)" }

lorentey

Hello

This sample file contains examples of all kinds of data that can be stored in a pile.

All text up to the first line that consists of a #pile version directive is ignored by the parser.
Feel free to write anything here.

This is how all text piles start: (The "1" is the version number of the file format.)

#pile:1

lorentey

Exposing the Memory Location of Class Instance Variables

Introduction

We propose to enable Swift code to retrieve the memory location of any directly addressable stored property in a class instance as an UnsafeMutablePointer value.

• Motivation
• Proposed Solution
• Efficiency Requirements
• Detailed Design

lorentey

Low-Level Atomic Operations ⚛︎

• Author: Karoy Lorentey
• Version: 2020-04-13/1
• Document URL: https://gist.github.com/lorentey/cf8703b5974ebe8f85cfb92a6628880d
• Forum Thread: https://forums.swift.org/t/low-level-atomic-operations/34683
• Implementation:
  • [swiftlang/swift#30553][implementation] (Atomic operations)
  • [swiftlang/swift#26969][constantPR] (Constant-constrained ordering arguments)