Function tower::util::option_layer[−][src]

pub fn option_layer<L>(layer: Option<L>) -> Either<L, Identity>ⓘNotable traits for Either<A, B>
impl<A, B, T, AE, BE> Future for Either<A, B> where
    A: Future<Output = Result<T, AE>>,
    AE: Into<BoxError>,
    B: Future<Output = Result<T, BE>>,
    BE: Into<BoxError>,     type Output = Result<T, BoxError>;

This is supported on crate feature util only.

Convert an Option<Layer> into a Layer.

use tower::util::option_layer;
// Layer to apply a timeout if configured
let maybe_timeout = option_layer(timeout.map(TimeoutLayer::new));

ServiceBuilder::new()
    .layer(maybe_timeout)
    .service(svc);