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Protocol Buffers v34.0-rc1

Announcements

• This version includes breaking changes to: C++, Objective-C, PHP, Python.
• [Bazel] Remove deprecated ProtoInfo.transitive_imports. Use equivalent transitive_sources instead (https://github.com/protocolbuffers/protobuf/commit/0a5c2f6b633c1e5259f566cb42d30fe347b8aadb)
• [C++] Make generator headers private (https://github.com/protocolbuffers/protobuf/commit/3a2af3510f0d454dbe3e4dc281674b61c4d20b9e)
• [C++] Add a debug check that the target of CopyFrom is not a descendant of the source. (https://github.com/protocolbuffers/protobuf/commit/7a7589823d2cfaaf7994b050e98d5d553bc9b1c1)
• [C++] Add [[nodiscard]] to many APIs. (https://github.com/protocolbuffers/protobuf/commit/a70115f33f9af2c4b2202c800b84837e7fe0d738)
• [C++] Make the arena-enabled constructors of RepeatedField, RepeatedPtrField, and Map private. (https://github.com/protocolbuffers/protobuf/commit/ef890c3d0c79398c70e047fe5dd893f460ba2336)
• [C++] Remove deprecated FieldDescriptor::label() in OSS. Use is_repeated() or is_required() instead (https://github.com/protocolbuffers/protobuf/commit/b76faa921fdd244f374c7be0bddd4050fc42c292)
• [C++] Removes proto2::util::MessageDifferencer::AddIgnoreCriteria that takes a raw pointer as an argument in favor of the overload that takes a unique_ptr. Remove macro PROTOBUF_FUTURE_REMOVE_ADD_IGNORE_CRITERIA (https://github.com/protocolbuffers/protobuf/commit/b115358c64127896fed88b8b5ef5d91d86d8cbae)
• [C++] Remove deprecated FieldDescriptor::has_optional_keyword() in OSS. Use is_repeated() or has_presence() instead (https://github.com/protocolbuffers/protobuf/commit/68346ec9348e932664e58c3ecdcd1478f95233a8)
• [C++] Remove AddUnusedImportTrackFile() and ClearUnusedImportTrackFiles(). Remove PROTOBUF_FUTURE_RENAME_ADD_UNUSED_IMPORT (https://github.com/protocolbuffers/protobuf/commit/837a2cd1d6c75402b2503ffe7cd8aeaf25868536)
• [C++] Remove deprecated FieldDescriptor::is_optional() in OSS. Use (!is_required() && !is_repeated()) instead (https://github.com/protocolbuffers/protobuf/commit/9dbc5d479a8e453921485d8d3de47fb3c005f1af)
• [C++] Remove deprecated UseDeprecatedLegacyJsonFieldConflicts() (https://github.com/protocolbuffers/protobuf/commit/c301c2ca286327a21c50c0c4cd877afc9c655b00)
• [C++] All entity names have length limit (2afb0dc)
• [ObjC] Remove generate_minimal_imports generation option warning (https://github.com/protocolbuffers/protobuf/commit/45b1297fdaad5a9436d0e207422168c38dc45ac4)
• [ObjC] Fix nullability annotations on some GPB*Dictionary types. (https://github.com/protocolbuffers/protobuf/commit/ea67d6d26a48478a567c404679e3bb99cf230d50)
• [ObjC] Remove -[GPBFieldDescriptor optional] (https://github.com/protocolbuffers/protobuf/commit/3414dc151eb4dcbdb2ca952e2589993bf7af75c4)
• [Other] Remove deprecated flag for enabling MSVC support (https://github.com/protocolbuffers/protobuf/commit/97c979be6e0907e1051bee62584dac4594e73fa7)
• [PHP] Remove deprecated PHP APIs (https://github.com/protocolbuffers/protobuf/commit/9c45014099a4f7004fab6dd1278de2f4f2a393c5)
• [PHP] Remove deprecated PHP APIs FieldDescriptor getLabel, use IsRepeated or isRequired instead. (https://github.com/protocolbuffers/protobuf/commit/42081219920c6fad17ba6ddd1e28d111bcfb3345, https://github.com/protocolbuffers/protobuf/commit/cd76e675b14d00dda5623b30835d2bc7105fccc6, https://github.com/protocolbuffers/protobuf/commit/42081219920c6fad17ba6ddd1e28d111bcfb3345)
• [PHP] Add PHP typehints for setters and remove redundant GPBUtil checks (protocolbuffers/protobuf#25296) (https://github.com/protocolbuffers/protobuf/commit/aee03b78929c02461a5f9d8e136a2a016359b0cd)
• [PHP] support default values for editions/proto2 (protocolbuffers/protobuf#25161) (https://github.com/protocolbuffers/protobuf/commit/b01099d56350551bae3da88b97bf3027274c9f17)
• [Python] Raise errors in OSS when assign bool to int/enum field in Python Proto. (https://github.com/protocolbuffers/protobuf/commit/5b116fe2f14f49dd0cc3b76089983717f211025c)
• [Python] Remove float_format/double_format from python proto text_format (https://github.com/protocolbuffers/protobuf/commit/e4854a186e0bfa867d5bfa5cd850608a948fd488)
• [Python] Raise TypeError when convert non-timedelta to Duration, or convert non-datetime to Timestamp in python proto. (Original code may raise ArributeError) (https://github.com/protocolbuffers/protobuf/commit/00aaca1b4d98954bc2933d7c8a5379ba6088124c)
• [Python] Remove float_precision from python proto json_format (https://github.com/protocolbuffers/protobuf/commit/f027f1fcd52b9d080b7ee79f4024f53cf54e0dc5)
• [Python] Remove deprecated FieldDescriptor::label() in OSS. Use is_repeated() or is_required() instead (https://github.com/protocolbuffers/protobuf/commit/b76faa921fdd244f374c7be0bddd4050fc42c292)
• [Python] Remove deprecated FieldDescriptor.label (https://github.com/protocolbuffers/protobuf/commit/0a8ff55518ea5874478ad5b26515b31d186045a9)
• [Python] Remove deprecated UseDeprecatedLegacyJsonFieldConflicts() (https://github.com/protocolbuffers/protobuf/commit/c301c2ca286327a21c50c0c4cd877afc9c655b00)
• Protobuf News may include additional announcements or pre-announcements for upcoming changes.
• Migration Guide may include additional guidance for breaking changes.

Bazel

• Fix: cc_toolchain should prefer protoc when prebuilt flag is flipped. (#25168) (https://github.com/protocolbuffers/protobuf/commit/8c857c3a1c6a106b0a096f1c9fa504bfaca035a9)
• Breaking change: Remove deprecated ProtoInfo.transitive_imports. Use equivalent transitive_sources instead (https://github.com/protocolbuffers/protobuf/commit/0a5c2f6b633c1e5259f566cb42d30fe347b8aadb)
• Feat(bazel): wire up prebuilt protoc toolchain (#24115) (https://github.com/protocolbuffers/protobuf/commit/cc23698b486e690ea2eb873cc7596a87c74a3ba6)
• Migrate proto_descriptor_set (#23369) (https://github.com/protocolbuffers/protobuf/commit/8d4dfdd39a7a242a9ed631a6ab2192c57dd9b9c8)

Compiler

• Ruby codegen: support generation of rbs files (#15633) (https://github.com/protocolbuffers/protobuf/commit/6ebdf851ba78728f0aa145d38454ed9a316fb08d)
• Avoid collision name problems between a message named Xyz and a direct sibling enum named XyzView (https://github.com/protocolbuffers/protobuf/commit/eba53e8f172b273d679759a72ce4250131ee3df1)
• Generalizing and implementing ValidateFeatureSupport for both Options and Features during proto parsing (https://github.com/protocolbuffers/protobuf/commit/ed3c57114d8e2b47cca7697ddaa50c1b3762a6b0)
• Fix a bug with custom features outside of the pb package. (https://github.com/protocolbuffers/protobuf/commit/872d3ce7a4da00d7dcec33ced20cfe45235935e8)
• Fix import option handling when include_imports isn't set. (https://github.com/protocolbuffers/protobuf/commit/9ef9e80afd9bc8379d578fe67e5ab0738728c04e)
• Fix a bug in STRICT check of namespaced enums to properly check for 'reserved 1 to max' (https://github.com/protocolbuffers/protobuf/commit/1229d4adba24c0952ab85ce96bc7b7f8a1fe6d0f)
• Prevent accidental stripping of debug_redact options via import option. (https://github.com/protocolbuffers/protobuf/commit/f58b098bffa7ca4045ef7773b09151a6af5d0c28)

C++

• Add EnumerateEnumValues function. (https://github.com/protocolbuffers/protobuf/commit/397d5d99db274b379d1384814074bf7df39d32f7)

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