axum/axum-macros/tests/from_request/pass/state_via_infer.rs
David Pedersen 64960bb19c
Type safe state inheritance (#1532)
* Make state type safe

* fix examples

* remove unnecessary `#[track_caller]`s

* Router::into_service -> Router::with_state

* fixup docs

* macro docs

* add missing docs

* fix examples

* format

* changelog

* Update trybuild tests

* Make sure fallbacks are still inherited for opaque services (#1540)

* Document nesting routers with different state

* fix leftover conflicts
2022-11-18 11:02:58 +00:00

18 lines
448 B
Rust

use axum::{
extract::State,
routing::get,
Router,
};
use axum_macros::FromRequest;
fn main() {
let _: axum::routing::RouterService = Router::new()
.route("/b", get(|_: AppState| async {}))
.with_state(AppState::default());
}
// if we're extract "via" `State<AppState>` and not specifying state
// assume `AppState` is the state
#[derive(Clone, Default, FromRequest)]
#[from_request(via(State))]
struct AppState {}