---
title: "treatWarning(_:as:_:)"
framework: swift-package-manager
role: symbol
role_heading: Type Method
path: "swift-package-manager/documentation/packagedescription/swiftsetting/treatwarning(_:as:_:)"
---

# treatWarning(_:as:_:)

Controls how a specific Swift compiler warning is treated during compilation.

## Declaration

```swift
static func treatWarning(_ name: String, as level: WarningLevel, _ condition: BuildSettingCondition? = nil) -> SwiftSetting
```

## Parameters

- `name`: The name of the specific warning to control.
- `level`: The treatment level for the warning (.warning or .error).
- `condition`: A condition that restricts the application of the build setting.

## Discussion

Discussion Use this setting to specify whether a particular warning should be treated as a warning (default behavior) or as an error. This is equivalent to passing -Werror or -Wwarning followed by the warning name to the Swift compiler. This setting allows for fine-grained control over individual warnings. To control all warnings at once, use treatAllWarnings(as:_:) instead. note: First available in PackageDescription 6.2.

## See Also

### Configuring Swift Settings

- [define(_:_:)](swift-package-manager/documentation/packagedescription/swiftsetting/define(_:_:).md)
- [unsafeFlags(_:_:)](swift-package-manager/documentation/packagedescription/swiftsetting/unsafeflags(_:_:).md)
- [treatAllWarnings(as:_:)](swift-package-manager/documentation/packagedescription/swiftsetting/treatallwarnings(as:_:).md)