---
title: "encodePredicateExpression(_:forKey:variable:predicateConfiguration:)"
framework: swift
role: symbol
role_heading: Instance Method
path: "swift/keyedencodingcontainer/encodepredicateexpression(_:forkey:variable:predicateconfiguration:)-92gv8"
---

# encodePredicateExpression(_:forKey:variable:predicateConfiguration:)

## Declaration

```swift
mutating func encodePredicateExpression<T, each Input>(_ expression: T, forKey key: KeyedEncodingContainer<K>.Key, variable: repeat PredicateExpressions.Variable<each Input>, predicateConfiguration: PredicateCodableConfiguration) throws where T : PredicateExpression, T : Encodable, T.Output == Bool
```