Module features 

Edition feature resolution.

Protoc emits only unresolved (user-written) features in descriptor options. This module resolves them by walking the descriptor hierarchy (file → message → field/enum/oneof) and merging overrides onto edition defaults, matching the algorithm in protobuf’s C++ FeatureResolver.

Used by both [crate::pool::DescriptorPool] (runtime reflection) and buffa-codegen (re-exported via buffa_codegen::features). Codegen adds one extra resolver, resolve_field, that needs CodeGenContext and so lives in buffa-codegen.

Structs

ResolvedFeatures

The resolved set of edition features for a protobuf element.

Enums

EnumType

Controls how unknown enum values are handled.

FieldPresence

Controls whether field presence is tracked.

JsonFormat

Controls JSON format support.

MessageEncoding

Controls wire encoding of message fields.

RepeatedFieldEncoding

Controls wire encoding of repeated scalar fields.

Utf8Validation

Controls UTF-8 validation for string fields.

Functions

enum_features

Extract the unresolved FeatureSet from enum options.

field_features

Extract the unresolved FeatureSet from field options.

for_file

Resolve a file’s effective features from its declared syntax/edition and any explicit file-level feature overrides.

message_features

Extract the unresolved FeatureSet from message options.

oneof_features

Extract the unresolved FeatureSet from oneof options.

resolve_child

Compute a child element’s resolved features by merging the parent’s resolved features with the child’s unresolved FeatureSet override.