beccadax

Objective-C implementations in Swift

• Proposal: SE-NNNN
• Authors: Becca Royal-Gordon
• Review Manager: TBD
• Status: Awaiting implementation
• Implementation: Preliminary underscored version in main

Introduction

beccadax

Introduce cross-import overlays to factor out cross-cutting APIs

• Proposal: SE-NNNN
• Authors: Becca Royal-Gordon, Varun Gandhi
• Review Manager: TBD
• Implementation: In master behind -Xfrontend -enable-cross-import-overlays
• Status: Prototyped behind a feature flag

Introduction

beccadax

/// Passes a pointer to an uninitialized instance of `type` to `body`.
/// If `body` returns `true`, indicating that the memory has now been
/// initialized, returns the instance; otherwise returns `nil`.
@usableFromInline func withUninitialized<T>(
  _ type: T.Type, do body: (UnsafeMutablePointer<T>) -> Bool
) -> T? {
  let ptr = UnsafeMutablePointer<T>.allocate(capacity: 1)
  defer { ptr.deallocate() }

  guard body(ptr) else {

beccadax

Concise magic file names

• Proposal: SE-NNNN
• Authors: Brent Royal-Gordon, Dave DeLong
• Review Manager: TBD
• Status: Awaiting review
• Implementation: apple/swift#25656

Introduction

beccadax

struct _AppendingStringInterpolation<Result: ExpressibleByStringInterpolation> {
  var result: Result
}
 
protocol ExpressibleByAppendingStringInterpolation: ExpressibleByStringInterpolation where StringInterpolation == _AppendingStringInterpolation<Self> {
  init(stringLiteral: String)
  mutating func append(_ value: Self)
}

extension ExpressibleByAppendingStringInterpolation where StringInterpolation == _AppendingStringInterpolation<Self> {

beccadax

"Raw" mode string literals

• Proposal: SE-0200
• Author: John Holdsworth, Brent Royal-Gordon, Erica Sadun
• Review Manager: Doug Gregor
• Status: Returned for revision
• Implementation: apple/swift#13055
• Bugs: SR-6362 Needs Update for New Design

Introduction

beccadax

//
//  UserDefaults+Codable.swift
//  Converter UltraLight
//
//  Created by Brent Royal-Gordon on 8/31/17.
//  Copyright © 2017 Architechies. All rights reserved.
//  MIT-licensed, go nuts with it.
//

import Foundation

beccadax

//
//  UICollectionViewLayout+indexPaths.swift
//  Converter Calc
//
//  Created by Brent Royal-Gordon on 7/26/17.
//  Copyright © 2017 Architechies. All rights reserved.
//

import UIKit

beccadax

import Foundation
import ExplicitlyConvertible

let i8: Int8 = 8
let i64: Int64 = 64

i64 + ^i8                                 // => 72

struct Person {
    var name: String

beccadax

// First, let's test out the basic design. This is basically just an 
// HList.

// This recurses to the right because that makes subscripting simpler, 
// at the cost of making appending impossible to generalize.
public protocol TupleProtocol: RandomAccessCollection
    where Index == Int, IndexDistance == Int, Element == Any
{
    associatedtype First
    associatedtype Rest //: TupleProtocol