---
title: file
framework: combine
role: symbol
role_heading: Instance Property
path: combine/publishers/assertnofailure/file
---

# file

The filename used in the error message.

## Declaration

```swift
let file: StaticString
```

## See Also

### Inspecting publisher properties

- [upstream](combine/publishers/assertnofailure/upstream.md)
- [line](combine/publishers/assertnofailure/line.md)
- [prefix](combine/publishers/assertnofailure/prefix.md)