Expand description
Derive macros for usage-rs.
The macros here read usage-native attributes off a struct or enum and emit two things: static tables plus a monomorphic parse function for the hot path, and a cold function that renders the same declaration as a usage spec.
Depend on the usage-rs facade rather than on this crate directly.
§Status
Reserved and empty. The derive lands in milestone 4 — see PROGRESS.md.