---
title: predicate
framework: combine
role: symbol
role_heading: Instance Property
path: combine/publishers/allsatisfy/predicate
---

# predicate

A closure that evaluates each received element.

## Declaration

```swift
let predicate: (Upstream.Output) -> Bool
```

## Discussion

Discussion Return true to continue, or false to cancel the upstream and finish.

## See Also

### Inspecting publisher properties

- [upstream](combine/publishers/allsatisfy/upstream.md)