Struct Visitor 

pub struct Visitor(/* private fields */);

Another area cannot resolve it:

struct Console;
impl Area for Console {
    const NAME: &'static str = "console";
    const PREFIX: &'static str = "/console";
    const SIGN_IN: &'static str = "/";
    type Principal = Visitor;
}
async fn greet(_visitor: Visitor) -> sofie_core::Result<()> { Ok(()) }
fn routes(routes: &mut Routes<Console>) { routes.get("/", greet); }

Trait Implementations

impl AreaPrincipal for Visitor

No one signs in as one, so its Principal is never found.

const ACCESS: Access = Access::Public

type Record = Visitor

impl Debug for Visitor

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<M> Resolve<RequestContext<Web, M>> for Visitor

fn resolve( _context: &mut RequestContext<Web, M>, ) -> impl Future<Output = Result<Self>> + Send