Swift 5.5 proposals:
| https://developer.apple.com/videos/wwdc/2015/?id=101 101 Keynote | |
| https://developer.apple.com/videos/wwdc/2015/?id=102 102 Platforms State of the Union | |
| https://developer.apple.com/videos/wwdc/2015/?id=103 103 Apple Design Awards | |
| https://developer.apple.com/videos/wwdc/2015/?id=104 104 What's New in Xcode | |
| https://developer.apple.com/videos/wwdc/2015/?id=105 105 Introducing WatchKit for watchOS 2 | |
| https://developer.apple.com/videos/wwdc/2015/?id=106 106 What's New in Swift | |
| https://developer.apple.com/videos/wwdc/2015/?id=107 107 What's New in Cocoa Touch | |
| https://developer.apple.com/videos/wwdc/2015/?id=108 108 Building Watch Apps | |
| https://developer.apple.com/videos/wwdc/2015/?id=112 112 Think Audacious | |
| https://developer.apple.com/videos/wwdc/2015/?id=201 201 iOS Accessibility |
| import UIKit | |
| /// A validation rule for text input. | |
| public enum TextValidationRule { | |
| /// Any input is valid, including an empty string. | |
| case noRestriction | |
| /// The input must not be empty. | |
| case nonEmpty | |
| /// The enitre input must match a regular expression. A matching substring is not enough. | |
| case regularExpression(NSRegularExpression) |
As Swift evolves, it gains new language features and capabilities. There are different categories of features: some fill in gaps, taking existing syntax that is not permitted and giving it a semantics that fit well with the existing language, with features like conditional conformance or allowing existential values for protocols with Self or associated type requirements. Others introduce new capabilities or paradigms to the language, such as the addition of concurrency or comprehensive reflection.
There is another large category of language features that provide syntactic sugar to eliminate common boilerplate, taking something that can be written out in long-form and making it more concise. Such features don't technically add any expressive power to the language, because you can always write the long-form version, but their effect can be transformational if it enables use cases that would otherwise have been unwieldy. The synthesis of Codable conformances, for ex
[LLDB] can be customized with ~/.lldbinit to run commands and to load more commands from
shell and python scripts. One option is [Chisel] which provides several commands which can
be used to debug an software running in Xcode.
It is critical that LLDB can process the commands in ~/.lldbinit successfully as a failure
can cause the debugger to fail or run in an undefined way. The configuration listed in this Gist
prints a message at the start and end so that when the debugger is run it is clear if any errors
are shown in the Xcode console they are related to LLDB.
Swift’s type system supports a number of different ways of taking a function or type and abstracting it. Usually, this is done by adding a generic parameter and an associated set of constraints. Similarly, a function that takes a particular type of argument can be abstracted to any number of those arguments by making it variadic with triple-dot (...) syntax. Today, both of these features are permitted separately: you can define a generic function that takes a variable number of arguments, such as
func debugPrint<T>(_ items: T...)
where T: CustomDebugStringConvertible
{
for (item: T) in items {
stdout.write(item.debugDescription)
| @objc func _needsDoubleUpdateConstraintsPass() -> Bool { | |
| return true | |
| } | |
| override var intrinsicContentSize: CGSize { | |
| return attributedText?.size(forWidth: (engineBounds ?? bounds).width) ?? .zero | |
| } | |
| var engineBounds: CGRect? { | |
| let objcSelector = "_nsis_compatibleBoundsInEngine:") |
| extension Collection { | |
| func parallelMap<T>( | |
| parallelism requestedParallelism: Int? = nil, | |
| _ transform: @escaping (Element) async throws -> T | |
| ) async throws -> [T] { | |
| let defaultParallelism = 2 | |
| let parallelism = requestedParallelism ?? defaultParallelism | |
| let n = self.count | |
| if n == 0 { |
