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

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl Guard for AllGuard

impl Guard for AnyGuard

impl<F> Guard for F

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