Now that Swift 5 is taking proposals, I'm dusting off my proposal to
synthesize Equatable/Hashable conformance for enums and structs. I had
implemented this a few months ago hoping to squeeze it in by the Swift 4
deadline, but unfortunately the timeline was too tight.
The pull request for the proposal is here:
https://github.com/apple/swift-evolution/pull/706. (Direct link to proposal
The pull request for the implementation (rebased last night) is here:
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