# Span.BorrowingIterator A type that provides the sequence’s iteration interface and encapsulates its iteration state. ``` @frozen struct BorrowingIterator ``` ## Topics ### Initializers [`init(Span)`](/documentation/Swift/Span/BorrowingIterator/init(_:)) ### Instance Methods [`func nextSpan(maxCount: Int) -> Span`](/documentation/Swift/Span/BorrowingIterator/nextSpan(maxCount:)) Returns a span over the next group of elements that are ready to by visited, up to the specifed maximum. [`func skip(by: Int) -> Int`](/documentation/Swift/Span/BorrowingIterator/skip(by:)) Advances the position of this iterator by the specified offset, or until the end of the underlying type’s elements. ### Type Aliases [`typealias Failure`](/documentation/Swift/Span/BorrowingIterator/Failure) ### Default Implementations [BorrowingIteratorProtocol Implementations](/documentation/Swift/Span/BorrowingIterator/BorrowingIteratorProtocol-Implementations) ## Relationships ### Conforms To [`BorrowingIteratorProtocol`](/documentation/Swift/BorrowingIteratorProtocol) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)