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. Pitches The Pitches category is an area for pitching ideas for evolution of the Swift language prior to a formal review. Discussion The Evolution Discussion category is for general discussion of the evolution of the Swift language.

Topic	Replies	Views	Activity
[Pitch] Allow `some P?` and `any P?` (removing the need for parentheses) Pitches	61	1408	March 1, 2026
Pitch: Add FilePath to the standard library Pitches	44	1812	March 3, 2026
Pitch: Remove discardableResult from throwing task initializers Pitches	27	1124	February 24, 2026
~Escapable, Span, Ownership Annotations, etc Discussion	44	2327	February 12, 2026
SE-0510: Dictionary mapValuesWithKeys Proposal Reviews	9	621	February 7, 2026
SE-0512: Document that Mutex.withLockIfAvailable(_:) cannot spuriously fail Proposal Reviews mutex	22	2478	February 28, 2026
[AsyncAlgorithms] withDeadline Pitches async-algorithms	38	1803	February 28, 2026
SE-0514: Hashable Conformance for Dictionary.Keys, CollectionOfOne and EmptyCollection Proposal Reviews	19	804	February 27, 2026
Pitch: Add `withTemporaryAllocation` using `Output(Raw)Span` Pitches span	12	534	February 25, 2026
SE-0513: API to get the path to the current executable Proposal Reviews stdlib	31	864	February 20, 2026
Swift needs String comparison suitable for search fields over user lists Pitches stdlib	10	564	March 2, 2026
[Accepted] SE-0504: Task Cancellation Shields Announcements concurrency , structured-concurren	10	549	February 12, 2026
Pitch: Non-Public Protocol Requirements Discussion protocols	19	783	February 13, 2026
[Pre-Pitch]: updating `with{Checked\|Unsafe}Continuation` to support typed throws (and perhaps nonisolated(nonsending)) Pitches	13	535	February 18, 2026
Add assignments into conditional logic Pitches	21	805	February 17, 2026
Where is Swift heading for? Discussion outlandish-phrases	18	1102	February 14, 2026
ST-0021: Targeted Interoperability between Swift Testing and XCTest Proposal Reviews swift-testing	11	459	March 2, 2026
Un-nesting the happy path when catching errors Discussion error , nested , error-handling , do-catch	11	525	February 25, 2026
Integer generic parameters for protocols Discussion integer-generics	9	366	February 5, 2026
SE-0515: Allow `reduce` to produce noncopyable results Proposal Reviews	2	228	February 25, 2026
[Accepted] SE-0508: Array expression trailing closures Announcements	0	261	February 13, 2026
The developer experience of SwiftSyntaxBuilder for Swift macros is very poor Discussion	0	250	February 14, 2026
Task Gates for the Standard Library Discussion concurrency	2	364	February 28, 2026
SE-0517: UniqueBox Proposal Reviews	3	233	March 3, 2026
[Accepted with modifications] SE-0502: Exclude private initialized properties from memberwise initializer Announcements	0	167	February 4, 2026
[Pitch #3] Compile-time lifetime dependency annotations Pitches	5	381	February 27, 2026
[Accepted] SE-0509: Software Bill of Materials (SBOM) Generation for Swift Package Manager Announcements packagemanager	0	134	February 27, 2026
[Accepted] SE-0506 Advanced Observation Tracking Announcements	0	206	February 11, 2026
Cannot compose APIs that use typed throws Discussion typed-throws	8	309	February 13, 2026
[Pitch] Transferable Attachments Pitches swift-testing	0	158	March 2, 2026
[Accepted] SE-0503: Suppressed Default Conformances on Associated Types With Defaults Announcements	1	342	February 24, 2026
[Returned for Revision] SE-0505: Delayed Enqueuing for Executors Announcements	0	166	February 12, 2026
SE-0511: SwiftPM Add Target Plugin Command Proposal Reviews packagemanager	5	293	February 13, 2026
[Accepted] ST-0020: Add a filePath property to SourceLocation Announcements	0	109	February 10, 2026
[Pitch] Feature Availability Conditions for Toolchain Libraries Pitches	3	172	February 25, 2026
[Pitch][SwiftPM] Opt-in exact matching for version tags that include SemVer build metadata Pitches packagemanager	0	94	February 11, 2026
Yielding accessors and throwing callers Discussion	2	362	February 10, 2026
[Pitch] Attribute macros and macro delegation Pitches macros , attached-macros	5	324	February 16, 2026
[Returned for revision] ST-0018: Conditionally saving attachments Announcements swift-testing	0	106	February 9, 2026
[Pitch] Back-deploy System CInterop.stat for Migration Compatibility Pitches swift-system	5	179	February 23, 2026
[Accepted] ST-0019: Include metadata for tags, bugs, and time limit traits in event stream Announcements	0	71	February 11, 2026
Recursive data structures error consistency Discussion inlinearray	1	139	February 3, 2026
A limitation in RBI caused by closure isolation inference? Discussion concurrency	1	103	February 27, 2026
[Discussion] Add @discardableResult to addTaskUnlessCancelled methods Discussion	0	111	February 5, 2026