---
title: SwiftLanguageMode.v4_2
framework: packagedescription
role: symbol
role_heading: Case
path: packagedescription/swiftlanguagemode/v4_2
---

# SwiftLanguageMode.v4_2

The identifier for the Swift 4.2 language version.

## Declaration

```swift
case v4_2
```

## See Also

### Swift Language Modes

- [SwiftLanguageMode.v6](packagedescription/swiftlanguagemode/v6.md)
- [SwiftLanguageMode.v5](packagedescription/swiftlanguagemode/v5.md)
- [SwiftLanguageMode.v4](packagedescription/swiftlanguagemode/v4.md)
- [SwiftLanguageMode.version(_:)](packagedescription/swiftlanguagemode/version(_:).md)
- [SwiftLanguageMode.v3](packagedescription/swiftlanguagemode/v3.md)