Serializing a dictionary with any codable values

[jrose (Jordan Rose)]

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How to encode objects of unknown type?

How can I encode objects without knowing their type at compile time because I only hold a reference to a protocol type? Here is a simple playground example: /******************/ import Cocoa protocol AnyFoo: class, Encodable {} class Foo: AnyFoo { var foo = 0 private enum CodingKeys: String, CodingKey { case foo } func encode(to encoder: Encoder) throws { var container = encoder.container(keyedBy: CodingKeys.self) try container.encode(foo, forKey: .foo) } } let f = Foo…