Trait AsyncLendingIterator

pub trait AsyncLendingIterator {
    type Ok<'i>
       where Self: 'i;
    type Err;

    // Required method
    fn try_next(
        &mut self,
    ) -> impl Future<Output = Result<Option<Self::Ok<'_>>, Self::Err>> + Send;

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

async streaming iterator with borrowed Item from Self.

Required Associated Types

type Ok<'i> where Self: 'i

type Err

Required Methods

fn try_next( &mut self, ) -> impl Future<Output = Result<Option<Self::Ok<'_>>, Self::Err>> + Send

Provided Methods

fn size_hint(&self) -> (usize, Option<usize>)

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl AsyncLendingIterator for Driver

type Ok<'i> = Message where Self: 'i

type Err = Error

impl AsyncLendingIterator for CopyOut

type Ok<'i> = Bytes where Self: 'i

type Err = Error

impl AsyncLendingIterator for PipelineItem<'_>

type Ok<'i> = GenericRow<&'i [Column], &'i mut Vec<Range<usize>>, Typed> where Self: 'i

type Err = Error

impl AsyncLendingIterator for RowSimpleStream

type Ok<'i> = GenericRow<&'i [Column], &'i mut Vec<Range<usize>>, NoTyped> where Self: 'i

type Err = Error

impl AsyncLendingIterator for RowStreamOwned

type Ok<'i> = GenericRow<&'i [Column], &'i mut Vec<Range<usize>>, Typed> where Self: 'i

type Err = Error

impl<'a> AsyncLendingIterator for PipelineStream<'a>

type Ok<'i> = PipelineItem<'i> where Self: 'i

type Err = Error

impl<'a> AsyncLendingIterator for RowStream<'a>

type Ok<'i> = GenericRow<&'i [Column], &'i mut Vec<Range<usize>>, Typed> where Self: 'i

type Err = Error

impl<I, F, O> AsyncLendingIterator for MapOk<I, F>

where I: AsyncLendingIterator + Send, F: Fn(I::Ok<'_>) -> O + Send, O: Send,

type Ok<'i> = O where Self: 'i

type Err = <I as AsyncLendingIterator>::Err