proposal: typesafe sync.Map - affected/package: /x/sync

[kf6nux]

Background

sync.Map was useful enough to be promoted from /x/, but was made before generics and utilizes interface{} (now any)

Proposal

Re-implement the existing API of sync.Map using generics for added type safety/convenience. Use alternate struct name to maintain backward compatibility (e.g. sync.MapGeneric)

Release

Release to /x/sync first while feedback is submitted.

Additional considerations

Proposal #47643 requested support for additional algorithms for additional use cases. We may want to allow the sync.Map's implementation algorithm to be user selectable. If so, I'd propose adding a method that can optionally be invoked on newly created sync.MapGeneric structs to specify the backing algorithm.

Separately

I volunteer to do the work.

[kf6nux]

Ah, I was just informed this is also being discussed here #48287

[ianlancetaylor]

Thanks. See also #47657. Closing as dup.