Byoungchan Lee 8c4601b831 Fix ambiguous overloaded operator== in C++20
Polymorphic comparison operators doesn't work in C++20.
(-Wambiguous-reversed-operator)
Fix this issue by using the non-virtual interface pattern.

Bug: chromium:1284275
Change-Id: I79e2bbcd3ae2f3b089183146f7e7c775c493e3f4
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/276560
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Daniel.L (Byoungchan) Lee <daniel.l@hpcnt.com>
Cr-Commit-Position: refs/heads/main@{#38210}
2022-09-26 16:23:00 +00:00
..
2022-05-09 12:03:21 +00:00
2021-08-16 14:38:57 +00:00
2022-07-14 15:38:20 +00:00
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2022-09-06 08:46:08 +00:00
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2022-03-23 10:23:54 +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/.

That is, 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.