tree d7d5cbb75965939edf08293ab9e22070ca7a2b41
parent 6b35fa71145b4d15efde45ca0c2c4bd02ad98f9d
author Wyatt Hepler <hepler@fuchsia.infra.roller.google.com> 1731400518 +0000
committer Copybara-Service <copybara-worker@google.com> 1731400587 -0800

[roll] Roll third_party/pigweed pw_channel: Rework inheritance to avoid SiblingCast

Change pw_channel to a new inheritance pattern that places AnyChannel in
the middle of the hierarchy. The various Channel API classes are private
empty bases of AnyChannel. This ensures conversions between compatible
Channel variants are valid, since all channel implementations have all
channel variants as bases. Channel implementations extend a ChannelImpl
with properties specified in template parameters, and unsupported
functions are automatically disabled.

This change also refactors and simplifies the channel.h header.
Properties and code for checking them are moved to a properties.h
header. Also, the macros to generate ChannelImpl specializations are
greatly simplified.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/247732
Original-Revision: 0422de1761e52ad5d1fad821880025fc27facf1c
GitOrigin-RevId: 99613738858d5efc3c540221a9e56d812c2689ee
Change-Id: I256b276fa82c661ab8250cfa048bb7dcbccd0a6e