---
title: Set.SubSequence
framework: swift
role: symbol
role_heading: Type Alias
path: swift/set/subsequence
---

# Set.SubSequence

A collection representing a contiguous subrange of this collection’s elements. The subsequence shares indices with the original collection.

## Declaration

```swift
typealias SubSequence = Slice<Set<Element>>
```

## Discussion

Discussion The default subsequence type for collections that don’t define their own is Slice.