---
title: "Expression(_:)"
framework: foundation
role: symbol
role_heading: Macro
path: "foundation/expression(_:)"
---

# Expression(_:)

## Declaration

```swift
@freestanding(expression) macro Expression<each Input, Output>(_ body: (repeat each Input) -> Output) -> Expression<repeat each Input, Output>
```

## See Also

### Macros

- [Predicate(_:)](foundation/predicate(_:).md)