• Introduce User-defined "Dynamic Member Lookup" Types:
  • First version: https://github.com/apple/swift-evolution/pull/768
  • Second version: https://github.com/apple/swift-evolution/pull/774
• Implementations:
  • First version: https://github.com/apple/swift/pull/13076
  • Second version: https://github.com/apple/swift/pull/13361
• Related "dynamic callable" proposal (gist in progress): https://gist.github.com/lattner/a6257f425f55fe39fd6ac7a2354d693d
• Chris’s email to Swift Evolution: https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20171113/041463.html

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