rust error

main.rs

extern crate iron;
extern crate router;

use iron::{BeforeMiddleware, AfterMiddleware, typemap, Iron, Request, Response, IronResult};
use router::{Router};


fn hello_world(_: &mut Request) -> IronResult<Response> {
    Ok(Response::with((iron::status::Ok, "Hello World\n")))
}

fn main() {
    let mut router = Router::new();
    router.get("/", hello_world);
    Iron::new(router).http("localhost:3000").unwrap();
}

// ---------- Errors ----------

$ cargo build
   Compiling hello_world v0.1.0 (file:///home/trent/prog/rust/hello_world)
src/main.rs:42:12: 42:33 error: type mismatch: the type `fn(&mut iron::request::Request<'_, '_>) -> core::result::Result<iron::response::Response, iron::error::IronError> {hello_world}` implements the trait `for<'r, 'r, 'r> core::ops::Fn<(&'r mut iron::request::Request<'r, 'r>,)>`, but the trait `for<'r, 'r, 'r> core::ops::Fn<(&'r mut iron::request::Request<'r, 'r>,)>` is required (expected struct `iron::request::Request`, found a different struct `iron::request::Request`) [E0281]
src/main.rs:42     router.get("/", hello_world);
                          ^~~~~~~~~~~~~~~~~~~~~
src/main.rs:42:12: 42:33 error: type mismatch: the type `fn(&mut iron::request::Request<'_, '_>) -> core::result::Result<iron::response::Response, iron::error::IronError> {hello_world}` implements the trait `for<'r, 'r, 'r> core::ops::FnOnce<(&'r mut iron::request::Request<'r, 'r>,)>`, but the trait `for<'r, 'r, 'r> core::ops::FnOnce<(&'r mut iron::request::Request<'r, 'r>,)>` is required (expected struct `iron::request::Request`, found a different struct `iron::request::Request`) [E0281]
src/main.rs:42     router.get("/", hello_world);
                          ^~~~~~~~~~~~~~~~~~~~~
src/main.rs:43:23: 43:45 error: no method named `http` found for type `iron::iron::Iron<router::router::Router>` in the current scope
src/main.rs:43     Iron::new(router).http("localhost:3000").unwrap();
                                     ^~~~~~~~~~~~~~~~~~~~~~
src/main.rs:43:23: 43:45 note: the method `http` exists but the following trait bounds were not satisfied: `router::router::Router : iron::middleware::Handler`
src/main.rs:43:5: 43:14 error: the trait `for<'r, 'r, 'r> core::ops::Fn<(&'r mut iron::request::Request<'r, 'r>,)>` is not implemented for the type `router::router::Router` [E0277]
src/main.rs:43     Iron::new(router).http("localhost:3000").unwrap();
                   ^~~~~~~~~
src/main.rs:43:5: 43:14 help: run `rustc --explain E0277` to see a detailed explanation
src/main.rs:43:5: 43:14 note: required by `iron::iron::Iron<H>::new`
src/main.rs:43     Iron::new(router).http("localhost:3000").unwrap();
                   ^~~~~~~~~
src/main.rs:43:5: 43:14 error: the trait `for<'r, 'r, 'r> core::ops::FnOnce<(&'r mut iron::request::Request<'r, 'r>,)>` is not implemented for the type `router::router::Router` [E0277]
src/main.rs:43     Iron::new(router).http("localhost:3000").unwrap();
                   ^~~~~~~~~
src/main.rs:43:5: 43:14 help: run `rustc --explain E0277` to see a detailed explanation
src/main.rs:43:5: 43:14 note: required by `iron::iron::Iron<H>::new`
src/main.rs:43     Iron::new(router).http("localhost:3000").unwrap();
                   ^~~~~~~~~
error: aborting due to 5 previous errors
Could not compile `hello_world`.