---
title: SwiftLanguageMode.v4
framework: swift-package-manager
role: symbol
role_heading: Case
path: swift-package-manager/documentation/packagedescription/swiftlanguagemode/v4
---

# SwiftLanguageMode.v4

The identifier for the Swift 4 language version.

## Declaration

```swift
case v4
```

## 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_2](swift-package-manager/documentation/packagedescription/swiftlanguagemode/v4_2.md)
- [SwiftLanguageMode.version(_:)](swift-package-manager/documentation/packagedescription/swiftlanguagemode/version(_:).md)
- [SwiftLanguageMode.v3](swift-package-manager/documentation/packagedescription/swiftlanguagemode/v3.md)