---
title: SwiftLanguageMode.v4_2
framework: swift-package-manager
role: symbol
role_heading: Case
path: swift-package-manager/documentation/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](swift-package-manager/documentation/packagedescription/swiftlanguagemode/v6.md)
- [SwiftLanguageMode.v5](swift-package-manager/documentation/packagedescription/swiftlanguagemode/v5.md)
- [SwiftLanguageMode.v4](swift-package-manager/documentation/packagedescription/swiftlanguagemode/v4.md)
- [SwiftLanguageMode.version(_:)](swift-package-manager/documentation/packagedescription/swiftlanguagemode/version(_:).md)
- [SwiftLanguageMode.v3](swift-package-manager/documentation/packagedescription/swiftlanguagemode/v3.md)