griotspeak

import Equatable

@Equatable
struct SomeStruct { }

let a = SomeStruct()
let b = SomeStruct()

print(a == b)

griotspeak

#!/bin/sh

####################################################
# HEY! set SWIFT_SOURCE_PATH or nothing will work. #
####################################################

set -e

if [ -z "${SWIFTPM_CONFIGURATION}" ]; then
  SWIFTPM_CONFIGURATION=lib/swift/pm/4

griotspeak

Pure Functions

• Proposal: SE-NNNN
• Author(s): TJ Usiyan
• Status: Awaiting review
• Review manager: TBD

Introduction

Some functions are, essentially, only meant to be transformations of their input and–as such–do not and should not reference any variables other than those passed in. These same functions are not meant to have any effects other than the aforementioned transformation of input. Currently, Swift cannot assist the developer and confirm that any given function is one of these 'pure' functions. To facilitate this, this proposal adds syntax to signal that a function is 'pure'.

griotspeak

import Foundation

extension JSONSerialization {
    enum CastingError : Swift.Error {
        case incompatibleType
    }

    static func jsonObject<T>(with data: Data, options: JSONSerialization.ReadingOptions) throws -> T {
        let anyResult: Any = try jsonObject(with: data, options: options)
        if let result = anyResult as? T {

griotspeak

//-----------------------------------------------------------------------------
// Settings.swift
// SwiftInSwift
//-----------------------------------------------------------------------------

let appName = "SwiftInSwift"

let defBlockPrefix = "// DEF-{"
let defBlockSuffix = "// }-DEF"

griotspeak

//
//  GalacticKnight.h
//  MoreMessage
//
//  Created by TJ Usiyan on 2016/17/08.
//  Copyright © 2016 Buttons and Lights LLC. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Person.h"

griotspeak

This is loosely related to but not meant to 'compete' with the ad hoc enum proposal.

Introduction

This proposal adds/creates syntax to allow ad hoc creation of enums whose members are strict subsets of explicitly defined enums.

Swift-evolution thread: Discussion thread topic for that proposal

Motivation

Consider a situation where we have an enum Color which represents the entire set of colors relevant to your application with many salient methods and operations. We have also declared an enum LCDColorModel with only three colors, red, blue, green .

griotspeak

struct Expression : IntegerLiteralConvertible {
    let value: Int

    init(integerLiteral value: Int) {
        self.value = value
    }
}

struct Subexpression : IntegerLiteralConvertible {
    let value: Int

griotspeak

extension Int {
    internal func divMod(other:Int) -> (quotient:Int, modulus:Int) {
        let quotient = self / other
        let remainder = self % other

        if (quotient > 0) || (remainder == 0) {
            return (quotient, remainder)
        } else if quotient == 0  && (self > 0) && (other < 0) {
            let div = quotient - 1
            let result = (div * other) - self

griotspeak

extension Int {
    internal func divMod(other:Int) -> (quotient:Int, modulus:Int) {
        let quotient = self / other
        let remainder = self % other

        if (quotient > 0) || (remainder == 0) {
            return (quotient, remainder)
        } else if quotient == 0  && (self > 0) && (other < 0) {
            let div = quotient - 1
            let result = (div * other) - self