Populating payloads of enum instances?

[NSExceptional]

EnumDescriptor doesn't appear to tell me anything about how payloads are stored. I assume it works similar to any, where values are only inline up to a certain point. Is this part of the ABI not stable or something?

Edit: looking at TypeLayout.rst tells me more about how enums are laid out by the compiler, but not how to fetch that layout for any given enum at runtime, such as for enums with multiple values in a single payload, or enums with more than one payload case.

Edit 2: Runtime.md also looks promising

[NSExceptional]

Answer here: https://forums.swift.org/t/populating-accessing-the-payload-of-an-enum-case-at-runtime/47921/2

[NSExceptional]

@Azoy Are enums with raw values treated as payload cases where the payload is exposed via .rawValue?

[Azoy]

No, enums with raw values are treated as empty cases.

enum Color: Int {
  case blue = 123
}

// is really

enum Color: RawRepresentable {
  typealias RawValue = Int

  case blue

  var rawValue: Int {
    switch self {
    case .blue:
      return 123
    }
  }
}