---
title: Publishers.CombineLatest4.Output
framework: combine
role: symbol
role_heading: Type Alias
path: combine/publishers/combinelatest4/output
---

# Publishers.CombineLatest4.Output

The kind of values published by this publisher.

## Declaration

```swift
typealias Output = (A.Output, B.Output, C.Output, D.Output)
```

## Discussion

Discussion This publisher produces four-element tuples of the upstream publishers’ output types.

## See Also

### Declaring supporting types

- [Publishers.CombineLatest4.Failure](combine/publishers/combinelatest4/failure.md)