---
title: AnyBidirectionalCollection.Indices
framework: swift
role: symbol
role_heading: Type Alias
path: swift/anybidirectionalcollection/indices
---

# AnyBidirectionalCollection.Indices

A type that represents the indices that are valid for subscripting the collection, in ascending order.

## Declaration

```swift
typealias Indices = DefaultIndices<AnyBidirectionalCollection<Element>>
```