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I've discovered an ability of Swift but I'm not sure it's safe. After modifying this StackOverflow answer, I've got a protocol that will give you, for any conforming object, a dictionary of [member variable name : its keyPath].

Getting KeyPaths to members automatically using Mirror

Hi all, @dan-zheng and I have been experimenting with a protocol that helps you iterate over all stored properties at runtime. Here's the idea: protocol StoredPropertyIterable { associatedtype AllStoredProperties : Collection where AllStoredProperties.Element == PartialKeyPath static var allStoredProperties: AllStoredProperties { get } } By conforming to StoredPropertyIterable, you get a type property that represents a collection of key paths to all stored properties de...

StoredPropertyIterable

Last updated: March 2019 Experimental KeyPathIterable is being incubated in the'tensorflow' branch of apple/swift and released as part of the Swift for TensorFlow toolchains, which you can play with. The authors will propose this feature through Swift Evolution in 2019. Updates will be posted on the initial pitch thread.

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Getting KeyPaths to members automatically using Mirror

tensorflow/swift

StoredPropertyIterable