---
title: "subscript(_:)"
framework: foundation
role: symbol
role_heading: Instance Subscript
path: "foundation/attributedstring/runs-swift.struct/run/subscript(_:)"
---

# subscript(_:)

## Declaration

```swift
@preconcurrency subscript<K>(_: K.Type) -> K.Value? where K : AttributedStringKey, K.Value : Sendable { get }
```