swift-mirror/docs/EmbeddedSwift/EmbeddedSwiftStatus.md

Embedded Swift -- Status

⚠️ Embedded Swift is experimental. This document might be out of date with latest development.

‼️ Use the latest downloadable 'Trunk Development' snapshot from swift.org to use Embedded Swift. Public releases of Swift do not yet support Embedded Swift.

For an introduction and motivation into Embedded Swift, please see "A Vision for Embedded Swift", a Swift Evolution document highlighting the main goals and approaches.

Embedded Standard Library Breakdown

This status table describes which of the following standard library features can be used in Embedded Swift:

Swift Standard Library Feature	Currently Supported In Embedded Swift
Array (dynamic heap-allocated container)	Yes
Array slices	Yes
assert, precondition, fatalError	Partial, only StaticStrings can be used as a failure message
Bool, Integer types, Float types	Yes
Codable, Encodable, Decodable	No
Collection + related protocols	Yes
Collection algorithms (sort, reverse)	Yes
CustomStringConvertible, CustomDebugStringConvertible	No
Dictionary (dynamic heap-allocated container)	Yes
FixedWidthInteger + related protocols	Yes
Hashable, Equatable, Comparable protocols	Yes
InputStream, OutputStream	No
Integer parsing	No
KeyPaths	No
Lazy collections	No
Mirror	No, intentionally unsupported long-term
Objective-C bridging	No, intentionally unsupported long-term
Optional	Yes
print / debugPrint	Partial (only StaticStrings and integers)
Range, ClosedRange, Stride	Yes
Result	Yes
Set (dynamic heap-allocated container)	Yes
SIMD types	Yes
StaticString	Yes
String (dynamic)	No (work in progress)
String Interpolations	No (work in progress)
Unicode	No
Unsafe[Mutable][Raw][Buffer]Pointer	Yes
VarArgs	No

Non-stdlib Features

This status table describes which of the following Swift features can be used in Embedded Swift:

Swift Feature	Currently Supported In Embedded Swift
Swift Concurrency	Partial, experimental (basics of actors and tasks work in single-threaded concurrency mode)