---
title: String.StringInterpolation
framework: swift
role: symbol
role_heading: Type Alias
path: swift/string/stringinterpolation
---

# String.StringInterpolation

The type each segment of a string literal containing interpolations should be appended to.

## Declaration

```swift
typealias StringInterpolation = DefaultStringInterpolation
```

## Discussion

Discussion The StringLiteralType of an interpolation type must match the StringLiteralType of the conforming type.