---
title: "decode(_:forKey:)"
framework: swift
role: symbol
role_heading: Instance Method
path: "swift/keyeddecodingcontainer/decode(_:forkey:)-8u7rt"
---

# decode(_:forKey:)

## Declaration

```swift
func decode<T, C>(_: CodableConfiguration<T?, C>.Type, forKey key: KeyedDecodingContainer<K>.Key) throws -> CodableConfiguration<T?, C> where T : DecodableWithConfiguration, T : EncodableWithConfiguration, C : DecodingConfigurationProviding, C : EncodingConfigurationProviding, T.DecodingConfiguration == C.DecodingConfiguration, T.EncodingConfiguration == C.EncodingConfiguration
```