Protocol Buffers v22.0-rc3

Announcements

• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

C++

• Add C++ support for retention attribute (8f882e7)

Java

• Use LazyStringArrayList directly in gencode. (e6dd59e)
• Add Java support for retention attribute (1325913)

Objective-C

• [ObjC] Mark classes that shouldn't be subclassed as such. (a185a6e)

Ruby

• For Ruby oneof fields, generate hazzers for members (#11655) (d1a3c6d)

Ruby C-Extension

• For Ruby oneof fields, generate hazzers for members (#11655) (d1a3c6d)
• See also UPB changes below, which may affect Ruby C-Extension.

UPB (Python/PHP/Ruby C-Extension)

• Ensure that extensions respect deterministic serialization. (protocolbuffers/upb@57a79de)
• Add ExtensionRegistry version of Parse to message templates. (protocolbuffers/upb@28de62f)
• Fix Upb PromotoUnknownToMessage for OneOf fields. (protocolbuffers/upb@10e57c0)
• Implement UPB OneOf MiniTable apis. (protocolbuffers/upb@067dfea)
• Remove reflection dependency for UPB compare utility. (protocolbuffers/upb@84a3fd2)

Other

• Remove unused headers, include missing headers, match args, etc. (21a6a26)
• Add a non-const overload of RepeatedPtrField::GetArena and deprecate the const overload. (4bf33da)
• Optimize Varint Parsing for 32 and 64 bits (ac76ae9)
• Fix reflection based parser for map entries with closed enum values. (55d2123)