Evolution

Proposal Reviews This category is for posting Swift Evolution proposals for review and feedback. 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. Discussion The Evolution Discussion category is for general discussion of the evolution of the Swift language. 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
About the Evolution category Evolution	0	16805	January 18, 2018
"New Codable" prototype available for feedback Discussion codable , macros	81	7292	October 12, 2026
SE-0554: Deployment target conditional compilation Proposal Reviews	30	938	October 12, 2026
[Accepted with modifications] SE-0492: Section Placement Control Announcements	1	428	October 12, 2026
[Pitch] Runtime enumeration of custom sections Pitches	0	83	October 12, 2026
SE-0556: Cell, ConstCell, and Volatile Proposal Reviews	9	499	October 11, 2026
[pre-pitch] Nonisolated nonsending Clock protocol Pitches	7	428	October 9, 2026
[Pitch] Cell, ConstCell, and Volatile Pitches	28	2087	October 9, 2026
[Pitch] Introduce a way to annotate functions that are called at most once Pitches	111	5041	October 9, 2026
[Pitch] Observation performance and modeling improvements Pitches performance , observation , noncopyable	13	1088	October 9, 2026
A possible type-based model for scope restrictions on ~Escapable types Discussion	13	2112	October 9, 2026
SE-0555: `inout` overload of `BorrowingIteratorProtocol.skip(by:)` Proposal Reviews	1	133	October 9, 2026
[Pitch] Task cancellation scopes Pitches concurrency	5	299	October 9, 2026
[Pitch] Attachments in the Swift Testing JSON event stream Pitches swift-testing	2	158	October 9, 2026
[Amend SE-0526] Clarify Deadline interactions with Cancellation Shields Pitches concurrency	0	109	October 9, 2026
[Pitch #2] `@objcDirect` — direct dispatch for Objective-C-exposed methods Pitches attributes , objc	16	767	October 8, 2026
[Pitch] Change CChar32 to UInt32 Pitches c-interop , stdlib , cxx-interop , interoperability	0	180	October 8, 2026
SE-0553: Task Identity Proposal Reviews	15	867	October 8, 2026
[Accepted] SE-0553: Task Identity Announcements	0	177	October 8, 2026
[Pitch] Bulk update operations for `MutableSpan` and `MutableRawSpan` Pitches	5	457	October 8, 2026
Implementing global @objc functions Pitches	52	1423	October 8, 2026
[Pitch] Import C structs with ARC pointer members Pitches c-interop , objc , cxx-interop , sil , clangimporter	12	3551	October 8, 2026
Minor source break with `if let` and `guard let` bindings Discussion	2	227	October 8, 2026
SE-0547: SwiftPM Support for Compilation Caching Proposal Reviews packagemanager	18	1298	October 8, 2026
[Accepted with modifications] SE-0547: SwiftPM Support for Compilation Caching Announcements	0	209	October 8, 2026
SE-0545: SwiftPM Build Performance Debugging Options Proposal Reviews	8	546	October 8, 2026
[Accepted] SE-0545: SwiftPM Build Performance Debugging Options Announcements	0	104	October 8, 2026
SE-0551: Span over a single value Proposal Reviews	6	735	October 7, 2026
[Accepted] SE-0551: Span over a single value Announcements	2	223	October 7, 2026
SE-0552: Rounding of Float.pi Proposal Reviews	11	1035	October 7, 2026