rust - 扭曲错误：错误[E0277]：特征绑定`impl warp::Future: warp::filter::FilterBase`不满足

Question

Warp 正在返回错误，

error[E0277]: the trait bound `impl warp::Future: warp::filter::FilterBase` is not satisfied
  --> src/http.rs:31:26
   |
31 |     let routes = index().or(users());
   |                             ^^^^^^^ the trait `warp::filter::FilterBase` is not implemented for `impl warp::Future`

我基本上有这个，

pub async fn users() -> impl Filter<Extract = impl warp::Reply, Error = warp::Rejection> + Clone {
  # stuff
}

我究竟做错了什么？

Answer 1

or接受一个返回 a 的函数Filter。您的函数被标记async，并返回一个Future<Output = Filter>. 您可以改为使用or_else的异步版本or：

let routes = index().or_else(users());