Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
dd7ca772d8
This PR extends `Std.Channel` to provide a full sync and async API, as well as unbounded, zero sized and bounded channels. A few notes on the implementation: - the bounded channel is inspired by [Go channels on steroids](https://docs.google.com/document/d/1yIAYmbvL3JxOKOjuCyon7JhW4cSv1wy5hC0ApeGMV9s/pub) though currently doesn't do any of the lock-free optimizations - @mhuisi convinced me that having a non-closable channel may be a good idea as this alleviates the need for error handling which is very annoying when working with `Task`. This does complicate the API a little bit and I'm not quite sure whether this is a choice we want users to give. An alternative to this would be to just write `send!` that panics on sending to a closed channel (receiving from a closed channel is not an error), this is for example the behavior that golang goes with. |
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