syn-based derive macros for json-bourne.
This crate is not used directly. Enable the derive feature on
json-bourne and use #[derive(FromJson, ToJson)] — the derives are
re-exported from the main crate so there is a single import surface.
Generated code targets the crate runtime (Lexer / JsonWrite /
FromJson / ToJson) via ::json_bourne::… paths that resolve in
the consumer's crate graph.
Supported shapes: named and tuple structs, and all four enum tagging
modes (external, internal #[bourne(tag)], adjacent #[bourne(tag, content)], untagged), both directions. Field attributes: rename,
skip, default, skip_if_none. Container attributes: rename_all,
deny_unknown_fields, tag, content, untagged.