Enum NativePullResult 

pub enum NativePullResult<'js> {
    Ready(Value<'js>),
    Eof,
    Pending(Pin<Box<dyn Future<Output = Result<Option<Value<'js>>>> + 'js>>),
}

Native async pull: returns Ok(Some(chunk)) or Ok(None) for EOF. Result of a native pull: data ready, EOF, or need async.

Variants

Ready(Value<'js>)

Data chunk ready synchronously

Eof

EOF — no more data

Pending(Pin<Box<dyn Future<Output = Result<Option<Value<'js>>>> + 'js>>)

Need async — returns a future for the pending case