• I have looked for existing issues (including closed) about this

Bug Report

Version

• axum 0.7

Description

I'm trying to turn a Router into a Service so I can use it in root_router.nest_service(...).

• Router has a .into_service() method
• Router::nest_service requires the service to implement Clone
• Router does implement Clone.
• RouterIntoService does not implement Clone.

All of that together means that, while I can write code that does

let sub_router = submod::create_router();

let router = Router::new()
  .nest("/sub", sub_router);

I can not write code that does

let sub_router_service = submod::create_router().into_service();

let router = Router::new()
  .nest_service("/sub", sub_router_service);

This seems like it might be an oversight? It looks to me like RouterIntoService should trivially implement Clone? (It only has a Router in it.)

Why do I want to use .nest_service instead of .nest in the first place? It's because I have a layer on my subrouter, and when I use .nest that layer doesn't get called for non-matching routes.