---
title: Iterable Implementations
framework: Swift
role: collectionGroup
role_heading: API Collection
path: swift/span/iterable-implementations
---

# Iterable Implementations

## Topics

### Structures

- [Span.BorrowingIterator](swift/span/borrowingiterator.md)

### Instance Properties

- [underestimatedCount](swift/span/underestimatedcount.md)
- [underestimatedCount](swift/span/underestimatedcount-8hm9l.md)

### Instance Methods

- [makeBorrowingIterator()](swift/span/makeborrowingiterator().md)

### Type Aliases

- [Span.Failure](swift/span/failure.md)