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
Add @ArrayBuilder to the standard library Pitches	40	2449	January 10, 2026
[Pitch] Box Pitches	75	2118	January 14, 2026
[Pitch] Borrowing Accessors Pitches	12	965	January 11, 2026
[Pitch] Allow `reduce` to produce noncopyable results Pitches	4	535	January 13, 2026
SE-0504: Task Cancellation Shields Proposal Reviews	39	1475	January 18, 2026
Efficient `Dictionary.mapValues` with key context Pitches	36	1198	January 17, 2026
[Pitch 2] Safe loading of values from `RawSpan` Pitches	36	513	January 17, 2026
Pitch: support for case and let when using where within switch and catch Pitches pitch	10	513	January 2, 2026
[Pitch] Safe loading of integer values from `RawSpan` Pitches	43	1079	January 15, 2026
[Pitch] Add a filePath property to SourceLocation in Swift Testing Pitches api , swift-testing	12	414	January 16, 2026
[Pitch] [Embedded] "Unicode" availability domain for APIs requiring the Unicode tables Pitches	7	437	January 18, 2026
Support trailing closure syntax for single-argument Array and Dictionary initializers Pitches	17	723	January 4, 2026
Concept: `~Initializable` Discussion concurrency	12	569	January 6, 2026
[Pitch] API to get the path to the current executable Pitches stdlib , command-line-tool , argument-parser	10	268	January 14, 2026
Avoiding `enum` across `public` API boundaries? Discussion	20	477	January 15, 2026
InlineArray pattern matching and destructuring Discussion pattern-matching , inlinearray	9	382	January 12, 2026
[Pitch] Hashable Conformance for Dictionary.Keys, CollectionOfOne and EmptyCollection Pitches	2	370	January 14, 2026
[Accepted] SE-0498: Expose demangle function in Runtime module Announcements	1	214	January 14, 2026
SE-0503: Suppressed Default Conformances on Associated Types With Defaults Proposal Reviews	3	344	January 13, 2026
Allow `#warning` in more places Discussion	4	415	January 1, 2026
Giving Dictionary.mapValues(_:) access to the associated key Discussion	4	338	January 7, 2026
[Accepted with modifications] SE-0500: Improving package creation with custom templates Announcements packagemanager	0	136	January 14, 2026
On chains, nils, and quiet failures Discussion optional	4	477	December 23, 2025
Pitch: Reparenting Resilient Protocols Pitches	6	343	January 18, 2026
SE-0505: Delayed Enqueuing for Executors Proposal Reviews	0	164	January 15, 2026
Thoughts on a sending init Discussion concurrency	6	243	January 15, 2026
SE-0502: Exclude private initialized properties from memberwise initializer Proposal Reviews	5	373	January 14, 2026
Please can we keep private @dynamicMemberLookup? Discussion	6	505	December 21, 2025
Using unsafe pointers without closures Discussion	1	207	January 12, 2026
Ternary unwrapping Pitches	8	357	January 17, 2026
ST-0018: Conditionally saving attachments Proposal Reviews swift-testing	0	107	January 10, 2026
Default Overload Annotation for Ambiguous Calls Pitches	8	263	January 12, 2026
[Pitch] Method capture lists (self / weak self / unowned self / none) for controlling implicit `self` in method bodies Pitches concurrency , functions	4	240	January 18, 2026
[Pitch] Concurrent Async Iteration over Parameter Packs Pitches generics , concurrency	0	172	January 11, 2026