miniblog.

Wilfred Hughes

May 20, 2019 at 21:49

Swift is exploring a cute idea for library transparency: you can distinguish between "this ABI is guaranteed to keep working" and "I want an extra layer of indirection so I can add to data structures without breaking downstream users". https://forums.swift.org/t/pitch-library-evolution-for-stable-abis/23026

Pitch: Library Evolution for Stable ABIs

A pitch to make some ABI annotations used in the standard library available to all Swift users. Proposal PR here Introduction One of Swift's goals is to be a good language for libraries with binary compatibility concerns, such as those shipped as part of Apple's OSs. This includes giving library authors the flexibility to add to their public interface, and to change implementation details, without breaking binary compatibility. At the same time, it's important that library authors be able to o...