The only public target here is the edition defaults helper macro, which can be used by external runtimes and plugins. None of this code is C++-specific though, and should be organized higher up. Appropriate aliases are also placed at the top level for public targets
PiperOrigin-RevId: 625392504
We transformed the proto2/proto3 protos to editions, and then run the same set of tests over both. This will verify that migrating to editions preserves the same proto2/proto3 behavior. These will not be enabled by default, and require a flag `--maximum_edition=2023`.
Future changes will:
- add more targeted editions-specific tests
- clean up our conformance test framework to allow for more targeted tests
- add wildcards to failure lists in limited cases to reduce noise
- add feature resolution conformance tests
PiperOrigin-RevId: 574570607
Every language has very different handling of utf8 validation. Any with proto2/proto3 differences will receive language-specific features for edition zero to better model these subtle differences.
PiperOrigin-RevId: 557258923
This helps make the API more complete, since the FeatureSet object will always be fully resolved on any accessible features. This specifically targets C++ plugins though, which will now have their features filled in by default. Before, any proto files that didn't include the language-specific features would result in unresolved extensions in the generators.
PiperOrigin-RevId: 557232654
This represents the future direction of protobuf, replacing proto2/proto3 syntax with editions. These will enable more incremental evolution of protobuf APIs through features, which are individual behaviors (such as whether field presence is explicit or implicit). For more details see https://protobuf.dev/editions/overview/.
This PR contains a working implementation of editions for the protoc frontend and C++ code generation, along with various infrastructure improvements to support it. It gives early access for anyone who wants to a preview of editions, but has no effect on proto2/proto3 syntax. It is flag-guarded behind the `--experimental_editions` flag, and is an experimental feature with no guarantees.
PiperOrigin-RevId: 544805690