Evolution

Proposal Reviews This category is for posting Swift Evolution proposals for review and feedback. Discussion The Evolution Discussion category is for general discussion of the evolution of the Swift language. Announcements This category is for announcements of Swift evolution proposal reviews and results, as well as other administrative announcements. Creation of new topics in this category is by site admins and Swift Core Team members only, although anyone can reply to topics once created. Pitches The Pitches category is an area for pitching ideas for evolution of the Swift language prior to a formal review.

Topic	Replies	Views	Activity
Swift Concurrency Roadmap Discussion concurrency	169	89279	June 7, 2021
Improving the UI of generics Discussion	179	61854	February 22, 2022
A New Approach to Testing in Swift Discussion testing , xctest , unit-testing , swift-testing	118	41717	October 24, 2024
Embedded Swift Pitches embedded , runtime , pitch , metadata	203	33407	August 17, 2024
A roadmap for improving Swift performance predictability: ARC improvements and ownership control Pitches	268	57212	August 20, 2024
Declarative String Processing Overview Pitches	120	19512	October 19, 2021
The state of Swift documentation Discussion	46	11646	September 1, 2020
[Pitch] if and switch expressions Pitches	94	12016	December 7, 2022
Swift type checking is undecidable Discussion	44	32198	November 9, 2020
[Pitch] Default values for string interpolations Pitches	59	5141	April 10, 2025
The future of serialization & deserialization APIs Discussion foundation , codable , macros	171	17810	January 18, 2026
Pitch: an Official Style Guide and Formatter for Swift Pitches	253	30459	March 19, 2019
[Pitch] Introduce existential `any` Pitches	203	15864	December 9, 2021
Lifting the "Self or associated type" constraint on existentials Pitches	163	23058	April 23, 2021
[Meta] Name deprecation notice Discussion	9	3543	February 3, 2021
Modify Accessors Pitches	303	34521	August 20, 2024
A Possible Vision for Macros in Swift Pitches	136	34632	June 20, 2023
Key Path Expressions as Functions Pitches	52	14388	May 7, 2019
Macro Adoption Concerns around SwiftSyntax Discussion swift-syntax , macros	105	18352	April 28, 2025
SwiftPM support for Swift scripts Pitches packagemanager	86	16791	May 27, 2021
[Pitch] Reflection Pitches reflection	60	15001	June 10, 2024
Precise error typing in Swift Discussion error-handling	89	13057	September 20, 2023
Serialization in Swift Discussion	169	25566	February 1, 2024
[Pitch] Observation Pitches	111	19757	March 17, 2023
Swift Package Registry Service Pitches packagemanager	97	30134	June 25, 2025
Pitch: Standard Library Preview Package Pitches	42	7694	July 27, 2019
[Accepted with Modification] SE-0296: async/await Announcements	32	21547	April 10, 2021
Integer generic parameters Pitches	131	7321	December 26, 2024
Pitching The Start of Variadic Generics Pitches generics	72	12034	December 4, 2021
[Accepted with modification] SE-0258: Property Wrappers Announcements	13	5430	February 24, 2021
[Prospective Vision] Improving the approachability of data-race safety Pitches concurrency , visions	183	14057	February 19, 2025
[Pitch] Clock, Instant, Date, and Duration Pitches concurrency , stdlib , time	317	22387	December 13, 2021
An Informal Introduction to Move-Only Types Discussion	27	10207	November 14, 2022
[Accepted with modifications] SE-0453: InlineArray (formerly: Vector, a fixed-size array) Announcements	80	5507	April 22, 2025
Vector, a fixed-size array Pitches array	271	14061	December 6, 2024
Function builders implementation progress Discussion	24	11682	June 24, 2020
Support use of an optional label for the first trailing closure Pitches	122	12001	March 16, 2021
Noncopyable Generics in Swift: A Code Walkthrough Discussion generics , swift-evolution , noncopyable , tutorial	47	6913	March 25, 2024
Support async calls in defer bodies Pitches	49	2361	September 1, 2025
[Pitch] A Vision for WebAssembly Support in Swift Pitches webassembly , wasi	26	13876	April 15, 2025
Piecemeal adoption of Swift 6 improvements in Swift 5.x Pitches	49	9667	June 22, 2022
Proposal draft for `is case` (pattern-match boolean expressions) Pitches	57	8198	February 15, 2023
Let's fix `if let` syntax Pitches	221	18246	July 28, 2021
Design Priorities for the Swift 6 Language Mode Announcements	79	20912	October 11, 2023
[Pre-Pitch] Import access control: a modest proposal Pitches	65	10895	April 3, 2022
Variadic Generics Pitches generics	99	14168	July 29, 2022
Progress toward the Swift 6 language mode Announcements	32	19883	February 15, 2024
`if let` shorthand Pitches	269	35636	April 9, 2022
[Pitch] Extensions on bound generic types Pitches	40	5165	June 22, 2022
Differentiable Programming Mega-Proposal Pitches autodiff	151	43563	July 26, 2020