Struct tower_web::extract::option::ExtractOptionFuture

pub struct ExtractOptionFuture<T> { /* fields omitted */ }

Extract an Option value from an HTTP request.

Trait Implementations

impl<T: Debug> Debug for ExtractOptionFuture<T>

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

Formats the value using the given formatter.

impl<T> ExtractFuture for ExtractOptionFuture<T> where     T: ExtractFuture,

type Item = Option<T::Item>

The argument extracted from the request.

fn poll(&mut self) -> Poll<(), Error>

Returns Ok(Ready(())) when extract() can be called. If NotReady is returned, the current task is registered for wakeup.

fn extract(self) -> Self::Item

Consume self and return the value extracted from the HTTP request.