Addition of @KeyContainer for encoding/decoding dictionaries about bettercodable

[marksands]

That's super interesting, thanks for the tip! The accompanying bugs.swift.org post has a lot of good info on that as well. I'll spend some time digging into these nuances and see what I can come up with.

[marksands]

@Stevenmagdy Appreciate the offer but no thanks. I'm still on the fence with supporting something similar to KeyedContainer. There are a lot of bugs-used-as-features in regards to Dictionary de/en/coding right now so I've been hoping to see Swift make a decision here or tell us this is the bed we must lie in.

[StevenSorial]

@Strobocop I have this extension in my code

extension KeyedDecodingContainer {
  func decodeRawKeyedDict<K: RawRepresentable, V: Decodable>(
    _ type: [K: V].Type,
    forKey key: Key
  ) throws -> [K: V] where K.RawValue: Decodable & Hashable {
    let rawDict = try decode([K.RawValue: V].self, forKey: key)
    let tupleArray = rawDict.compactMap { key, value in
      K(rawValue: key).flatMap { ($0, value) }
    }
    return .init(tupleArray) { first, second in first }
  }
}

@marksands Open for a PR?