Macro rpc

rpc!() { /* proc-macro */ }

Procedural macro rpc! – transforms async functions and methods into remote‑callable RPC endpoints.

The macro walks every item inside the supplied block:

• Async functions/methods become RPC handlers plus forwarding stubs.
• Structs are renamed and wrapped in ObjectRef type aliases.
• Impl blocks are duplicated into trait definitions so both concrete instances and their ObjectRef stubs implement the same API.

Items annotated with #[local] are passed through unchanged, allowing authors to mix local utilities and remote calls within the same block.

See the crate‑level docs for a full usage example.