Trait ContentStream 

pub trait ContentStream {
    // Required method
    fn next(
        &self,
    ) -> Pin<Box<dyn Future<Output = Result<Option<Rc<dyn Content>>, ContentError>> + '_>>;

    // Provided method
    fn produced(&self) -> Option<usize> { ... }
}

An asynchronous stream of content.

next resolves once the next item is available; the producer wakes the pending future, so collectors never poll.

Required Methods

fn next( &self, ) -> Pin<Box<dyn Future<Output = Result<Option<Rc<dyn Content>>, ContentError>> + '_>>

Resolves to the next item, or None once the stream is exhausted.

Provided Methods

fn produced(&self) -> Option<usize>

How many items the provider has produced so far, when it counts them.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors