---
title: next()
framework: swift
role: symbol
role_heading: Instance Method
path: swift/asyncthrowingfiltersequence/iterator/next()-5cr1d
---

# next()

Default implementation of next() in terms of next(isolation:), which is required to maintain backward compatibility with existing async iterators.

## Declaration

```swift
mutating func next() async throws(Self.Failure) -> Self.Element?
```