---
title: PredicateExpressions.DictionaryKeyDefaultValueSubscript
framework: foundation
role: symbol
role_heading: Structure
path: foundation/predicateexpressions/dictionarykeydefaultvaluesubscript
---

# PredicateExpressions.DictionaryKeyDefaultValueSubscript

## Declaration

```swift
struct DictionaryKeyDefaultValueSubscript<Wrapped, Key, Default> where Wrapped : PredicateExpression, Key : PredicateExpression, Default : PredicateExpression, Wrapped.Output == [Key.Output : Default.Output], Key.Output : Hashable
```

## Topics

### Initializers

- [init(wrapped:key:default:)](foundation/predicateexpressions/dictionarykeydefaultvaluesubscript/init(wrapped:key:default:).md)

### Instance Properties

- [default](foundation/predicateexpressions/dictionarykeydefaultvaluesubscript/default.md)
- [key](foundation/predicateexpressions/dictionarykeydefaultvaluesubscript/key.md)
- [wrapped](foundation/predicateexpressions/dictionarykeydefaultvaluesubscript/wrapped.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)