Harald Alvestrand aa653c0d76 Reland "Deprecate all classes related to AsyncResolver"
This reverts commit 08d431ec34a1c7ab52557702f2cebd9fdfacae9e.

Reason for revert: Last (hopefully) Chrome blocker removed

Original change's description:
> Revert "Deprecate all classes related to AsyncResolver"
>
> This reverts commit 61a442809cc06de93a613186084d2dfa9c934d81.
>
> Reason for revert: Breaks roll into Chromium
>
> Original change's description:
> > Deprecate all classes related to AsyncResolver
> >
> > and remove internal usage.
> >
> > Bug: webrtc:12598
> > Change-Id: Ie208682bfa0163f6c7a8e805151cfbda76324496
> > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/322860
> > Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
> > Auto-Submit: Harald Alvestrand <hta@webrtc.org>
> > Commit-Queue: Harald Alvestrand <hta@webrtc.org>
> > Cr-Commit-Position: refs/heads/main@{#40919}
>
> Bug: webrtc:12598
> Change-Id: I8aef5e062e19a51baec75873eddfca2a10467d3c
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/322901
> Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
> Auto-Submit: Harald Alvestrand <hta@webrtc.org>
> Commit-Queue: Harald Alvestrand <hta@webrtc.org>
> Cr-Commit-Position: refs/heads/main@{#40927}

Bug: webrtc:12598
Change-Id: I3c7b07c831eb9ff808368433d9b9ae8ec4b2afb6
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/323720
Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40944}
2023-10-17 07:08:57 +00:00
..
2023-10-16 06:34:26 +00:00
2023-02-24 11:48:39 +00:00
2023-10-05 10:04:47 +00:00
2023-10-16 06:34:26 +00:00
2023-03-27 17:06:33 +00:00
2023-09-07 10:41:49 +00:00

How to write code in the api/ directory

Mostly, just follow the regular style guide, but:

  • Note that api/ code is not exempt from the “.h and .cc files come in pairs” rule, so if you declare something in api/path/to/foo.h, it should be defined in api/path/to/foo.cc.
  • Headers in api/ should, if possible, not #include headers outside api/. Its not always possible to avoid this, but be aware that it adds to a small mountain of technical debt that were trying to shrink.
  • .cc files in api/, on the other hand, are free to #include headers outside api/.
  • Avoid structs in api, prefer classes.

The preferred way for api/ code to access non-api/ code is to call it from a .cc file, so that users of our API headers wont transitively #include non-public headers.

For headers in api/ that need to refer to non-public types, forward declarations are often a lesser evil than including non-public header files. The usual rules still apply, though.

.cc files in api/ should preferably be kept reasonably small. If a substantial implementation is needed, consider putting it with our non-public code, and just call it from the api/ .cc file.

Avoid defining api with structs as it makes harder for the api to evolve. Your struct may gain invariant, or change how it represents data. Evolving struct from the api is particular challenging as it is designed to be used in other code bases and thus needs to be updated independetly from its usage. Class with accessors and setters makes such migration safer. See Google C++ style guide for more.

If you need to evolve existent struct in api, prefer first to convert it into a class.