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[embedded] Add language feature list to EmbeddedSwiftStatus.md #72311

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Mar 16, 2024
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[embedded] Add language feature list to EmbeddedSwiftStatus.md #72311

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17 changes: 16 additions & 1 deletion docs/EmbeddedSwift/EmbeddedSwiftStatus.md
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Expand Up @@ -6,6 +6,21 @@

For an introduction and motivation into Embedded Swift, please see "[A Vision for Embedded Swift](https://github.com/apple/swift-evolution/blob/main/visions/embedded-swift.md)", a Swift Evolution document highlighting the main goals and approaches.

## Embedded Swift Language Features

| **Language Feature** | **Currently Supported In Embedded Swift** |
|-------------------------------------------------------|-------------------------------------------|
| *Anything not listed below* | Yes |
| Library Evolution (resilience) | No, intentionally unsupported long-term |
| Objective-C interoperability | No, intentionally unsupported long-term |
| Non-WMO builds | No, intentionally unsupported long-term (WMO should be used) |
| Existentials | No, currently disallowed |
| Any, AnyObject | No, currently disallowed |
| Metatypes | No, currently only allowed as unused arguments (type hints) |
| Untyped throwing | No, intentionally unsupported long-term (typed throwing should be used instead) |
| Weak references, unowned references | No |
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We should add:

  • non-final generic class methods

| Non-final generic class methods | No, intentionally unsupported long-term |

## Embedded Standard Library Breakdown

This status table describes which of the following standard library features can be used in Embedded Swift:
Expand All @@ -27,7 +42,7 @@ This status table describes which of the following standard library features can
| Integer parsing | No |
| KeyPaths | No |
| Lazy collections | No |
| Mirror | No, intentionally unsupported long-term |
| Mirror (runtime reflection) | No, intentionally unsupported long-term |
| Objective-C bridging | No, intentionally unsupported long-term |
| Optional | Yes |
| print / debugPrint | Partial (only StaticStrings and integers) |
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