Enum OptionService 

pub enum OptionService<A, B> {
    Some(A),
    None(B),
}

Available on crate feature util only.

The Service produced by OptionLayer.

Its error type is BoxError, erasing any difference between the layered and unlayered branches’ error types.

Variants

Some(A)

The inner layer was present; the layered service.

None(B)

The inner layer was absent; the unmodified service.

Trait Implementations

impl<A: Clone, B: Clone> Clone for OptionService<A, B>

fn clone(&self) -> OptionService<A, B>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<A: Copy, B: Copy> Copy for OptionService<A, B>

impl<A: Debug, B: Debug> Debug for OptionService<A, B>

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

Formats the value using the given formatter.

impl<A, B, Request> Service<Request> for OptionService<A, B>

where A: Service<Request>, A::Error: Into<BoxError>, B: Service<Request, Response = A::Response>, B::Error: Into<BoxError>,

type Response = <A as Service<Request>>::Response

Responses given by the service.

type Error = Box<dyn Error + Send + Sync>

Errors produced by the service.

type Future = ResponseFuture<<A as Service<Request>>::Future, <B as Service<Request>>::Future>

The future response value.

fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>

Returns Poll::Ready(Ok(())) when the service is able to process requests.

fn call(&mut self, request: Request) -> Self::Future

Process the request and return the response asynchronously.