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

# predicate

The closure that determines whether the publisher should consider an element as a match.

## Declaration

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

## See Also

### Inspecting publisher properties

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