---
title: PredicateExpressions.Filter
framework: foundation
role: symbol
role_heading: Structure
path: foundation/predicateexpressions/filter
---

# PredicateExpressions.Filter

## Declaration

```swift
struct Filter<LHS, RHS> where LHS : PredicateExpression, RHS : PredicateExpression, LHS.Output : Sequence, RHS.Output == Bool
```

## Topics

### Initializers

- [init(_:_:)](foundation/predicateexpressions/filter/init(_:_:).md)

### Instance Properties

- [filter](foundation/predicateexpressions/filter/filter.md)
- [sequence](foundation/predicateexpressions/filter/sequence.md)
- [variable](foundation/predicateexpressions/filter/variable.md)

### Type Aliases

- [PredicateExpressions.Filter.Element](foundation/predicateexpressions/filter/element.md)

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Decodable](swift/decodable.md)
- [Encodable](swift/encodable.md)
- [Escapable](swift/escapable.md)
- [PredicateExpression](foundation/predicateexpression.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)
- [StandardPredicateExpression](foundation/standardpredicateexpression.md)