---
title: OutputSpan.Failure
framework: Swift
role: symbol
role_heading: Type Alias
platforms: [iOS 27.0+, iPadOS 27.0+, Mac Catalyst 27.0+, macOS 27.0+, tvOS 27.0+, visionOS 27.0+, watchOS 27.0+]
path: swift/outputspan/failure
---

# OutputSpan.Failure

## Declaration

```swift
typealias Failure = Never
```