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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 (protocolbuffers/protobuf@0a5c2f6)
• [C++] Make generator headers private (protocolbuffers/protobuf@3a2af35)
• [C++] Add a debug check that the target of CopyFrom is not a descendant of the source. (protocolbuffers/protobuf@7a75898)
• [C++] Add [[nodiscard]] to many APIs. (protocolbuffers/protobuf@a70115f)
• [C++] Make the arena-enabled constructors of RepeatedField, RepeatedPtrField, and Map private. (protocolbuffers/protobuf@ef890c3)
• [C++] Remove deprecated FieldDescriptor::label() in OSS. Use is_repeated() or is_required() instead (protocolbuffers/protobuf@b76faa9)
• [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 (protocolbuffers/protobuf@b115358)
• [C++] Remove deprecated FieldDescriptor::has_optional_keyword() in OSS. Use is_repeated() or has_presence() instead (protocolbuffers/protobuf@68346ec)
• [C++] Remove AddUnusedImportTrackFile() and ClearUnusedImportTrackFiles(). Remove PROTOBUF_FUTURE_RENAME_ADD_UNUSED_IMPORT (protocolbuffers/protobuf@837a2cd)
• [C++] Remove deprecated FieldDescriptor::is_optional() in OSS. Use (!is_required() && !is_repeated()) instead (protocolbuffers/protobuf@9dbc5d4)
• [C++] Remove deprecated UseDeprecatedLegacyJsonFieldConflicts() (protocolbuffers/protobuf@c301c2c)
• [C++] All entity names have length limit (2afb0dc)
• [ObjC] Remove generate_minimal_imports generation option warning (protocolbuffers/protobuf@45b1297)
• [ObjC] Fix nullability annotations on some GPB*Dictionary types. (protocolbuffers/protobuf@ea67d6d)
• [ObjC] Remove -[GPBFieldDescriptor optional] (protocolbuffers/protobuf@3414dc1)
• [Other] Remove deprecated flag for enabling MSVC support (protocolbuffers/protobuf@97c979b)
• [PHP] Remove deprecated PHP APIs (protocolbuffers/protobuf@9c45014)
• [PHP] Remove deprecated PHP APIs FieldDescriptor getLabel, use IsRepeated or isRequired instead. (protocolbuffers/protobuf@4208121, protocolbuffers/protobuf@cd76e67, protocolbuffers/protobuf@4208121)
• [PHP] Add PHP typehints for setters and remove redundant GPBUtil checks (protocolbuffers/protobuf#25296) (protocolbuffers/protobuf@aee03b7)
• [PHP] support default values for editions/proto2 (protocolbuffers/protobuf#25161) (protocolbuffers/protobuf@b01099d)
• [Python] Raise errors in OSS when assign bool to int/enum field in Python Proto. (protocolbuffers/protobuf@5b116fe)
• [Python] Remove float_format/double_format from python proto text_format (protocolbuffers/protobuf@e4854a1)
• [Python] Raise TypeError when convert non-timedelta to Duration, or convert non-datetime to Timestamp in python proto. (Original code may raise ArributeError) (protocolbuffers/protobuf@00aaca1)
• [Python] Remove float_precision from python proto json_format (protocolbuffers/protobuf@f027f1f)
• [Python] Remove deprecated FieldDescriptor::label() in OSS. Use is_repeated() or is_required() instead (protocolbuffers/protobuf@b76faa9)
• [Python] Remove deprecated FieldDescriptor.label (protocolbuffers/protobuf@0a8ff55)
• [Python] Remove deprecated UseDeprecatedLegacyJsonFieldConflicts() (protocolbuffers/protobuf@c301c2c)
• 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) (protocolbuffers/protobuf@8c857c3)
• Breaking change: Remove deprecated ProtoInfo.transitive_imports. Use equivalent transitive_sources instead (protocolbuffers/protobuf@0a5c2f6)
• Feat(bazel): wire up prebuilt protoc toolchain (#24115) (protocolbuffers/protobuf@cc23698)
• Migrate proto_descriptor_set (#23369) (protocolbuffers/protobuf@8d4dfdd)

Compiler

• Ruby codegen: support generation of rbs files (#15633) (protocolbuffers/protobuf@6ebdf85)
• Avoid collision name problems between a message named Xyz and a direct sibling enum named XyzView (protocolbuffers/protobuf@eba53e8)
• Generalizing and implementing ValidateFeatureSupport for both Options and Features during proto parsing (protocolbuffers/protobuf@ed3c571)
• Fix a bug with custom features outside of the pb package. (protocolbuffers/protobuf@872d3ce)
• Fix import option handling when include_imports isn't set. (protocolbuffers/protobuf@9ef9e80)
• Fix a bug in STRICT check of namespaced enums to properly check for 'reserved 1 to max' (protocolbuffers/protobuf@1229d4a)
• Prevent accidental stripping of debug_redact options via import option. (protocolbuffers/protobuf@f58b098)

C++

• Add EnumerateEnumValues function. (protocolbuffers/protobuf@397d5d9)

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