Module kotlin 

Kotlin metadata extraction from @kotlin.Metadata annotations.

Reads the protobuf-encoded metadata to recover Kotlin-specific information that is lost in bytecode compilation: extension receivers, nullable types, companion objects, data classes, sealed hierarchies.

Architecture

The @kotlin.Metadata annotation embeds a protobuf-encoded blob (d1) alongside a string table (d2). This module provides a zero-dependency protobuf wire-format reader that extracts the specific field numbers used by kotlin.metadata.jvm.proto without requiring a full protobuf runtime.

Supported metadata kinds

Currently only kind=1 (Class) is decoded. Other kinds (file facade, synthetic, multi-file class) return None, falling back to bytecode-only analysis.

Structs

KotlinClassMetadata

Decoded Kotlin metadata for a class.

KotlinExtensionFunction

An extension function with its receiver type.

Enums

KotlinClassKind

Kotlin class kind as encoded in the metadata flags (bits 9-11).

KotlinVisibility

Kotlin visibility as encoded in the metadata flags (bits 3-5).

Functions

decode_kotlin_metadata

Decode Kotlin metadata from a KotlinMetadataStub.