Hi Solli,
`CodingKey` conformance for `enum`s is synthesized by the compiler given
certain rules — you can see mention of this in the [Codable
proposal](https://github.com/apple/swift-evolution/blob/master/proposals/0166-swift-archival-serialization.md)
[search for `public protocol CodingKey`].
If you’re interested in specific implementation for how the compiler
does this, you can refer to
[lib/Sema/DerivedConformanceCodingKey.cpp](https://github.com/apple/swift/blob/master/lib/Sema/DerivedConformanceCodingKey.cpp).
Happy to answer any questions on this you might have.
— Itai
On 4 Oct 2017, at 14:50, Solli Honorio via swift-users wrote:
Studying "Codable.swift" and "JSONEncoder.swift" to understand how
decoding
works under the hood, I got confused about how CodingKey is
implemented for
'enum'. Shouldn't have an extension of RawRepresentable to implement
the
CodingKey protocol?
This is the answer I'm looking for, how the CodingKey protocol is
implemented on enum?
I appreciate any help, tks
Solli Honorio
--
"o animal satisfeito dorme". - Guimarães Rosa
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