Trait Guard 

pub trait Guard {
    // Required method
    fn check(&self, request: &RequestHead) -> bool;

    // Provided method
    fn fmt(&self, f: &mut Formatter<'_>) -> Result { ... }
}

Trait defines resource guards. Guards are used for route selection.

Guards can not modify the request object. But it is possible to store extra attributes on a request by using the Extensions container. Extensions containers are available via the RequestHead::extensions() method.

Required Methods

fn check(&self, request: &RequestHead) -> bool

Check if request matches predicate

Provided Methods

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

Debug format

Implementors

impl Guard for AllGuard

impl Guard for AnyGuard

impl<F> Guard for F

where F: Fn(&RequestHead) -> bool,