---
title: BorrowingIterator
framework: swift
role: symbol
role_heading: Associated Type
path: swift/borrowingsequence/borrowingiterator
---

# BorrowingIterator

A type that provides the sequence’s iteration interface and encapsulates its iteration state.

## Declaration

```swift
associatedtype BorrowingIterator : BorrowingIteratorProtocol, ~Copyable, ~Escapable
```