Trait ExactSizeFallibleLender 

pub trait ExactSizeFallibleLender: FallibleLender {
    // Provided methods
    fn len(&self) -> usize { ... }
    fn is_empty(&self) -> bool { ... }
}

The FallibleLender version of core::iter::ExactSizeIterator.

Provided Methods

fn len(&self) -> usize

Returns the exact remaining length of the lender.

See ExactSizeLender::len.

fn is_empty(&self) -> bool

Returns true if the lender has no more elements.

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.

Implementations on Foreign Types

impl<I: ExactSizeFallibleLender> ExactSizeFallibleLender for &mut I

fn len(&self) -> usize

fn is_empty(&self) -> bool

Implementors

impl<'a, L, E> ExactSizeFallibleLender for Once<'a, L, E>

where E: 'a, L: ?Sized + CovariantFallibleLending,

impl<'this, L> ExactSizeFallibleLender for Peekable<'this, L>

where L: ExactSizeFallibleLender,

impl<A, B> ExactSizeFallibleLender for Zip<A, B>

where A: ExactSizeFallibleLender, B: ExactSizeFallibleLender<Error = A::Error>,

impl<E, I> ExactSizeFallibleLender for Convert<E, I>

where I: ExactSizeLender + LenderResult<E>,

impl<E, L, F> ExactSizeFallibleLender for MapErr<E, L, F>

where F: FnMut(L::Error) -> E, L: ExactSizeFallibleLender,

impl<L> ExactSizeFallibleLender for Enumerate<L>

where L: ExactSizeFallibleLender,

impl<L> ExactSizeFallibleLender for Fuse<L>

where L: ExactSizeFallibleLender,

impl<L> ExactSizeFallibleLender for IntoFallible<L>

where L: ExactSizeLender,

impl<L> ExactSizeFallibleLender for Rev<L>

where L: ExactSizeFallibleLender + DoubleEndedFallibleLender,

impl<L> ExactSizeFallibleLender for Skip<L>

where L: ExactSizeFallibleLender,

impl<L> ExactSizeFallibleLender for StepBy<L>

where L: ExactSizeFallibleLender,

impl<L> ExactSizeFallibleLender for Take<L>

where L: ExactSizeFallibleLender,

impl<L, E> ExactSizeFallibleLender for Empty<L, E>

where L: ?Sized + for<'all> FallibleLending<'all>,

impl<L, E> ExactSizeFallibleLender for OnceErr<L, E>

where L: ?Sized + CovariantFallibleLending,

impl<L, E> ExactSizeFallibleLender for RepeatErr<L, E>

where L: ?Sized + CovariantFallibleLending, E: Clone,

impl<L, E, F> ExactSizeFallibleLender for RepeatWithErr<L, F>

where L: ?Sized + CovariantFallibleLending, F: FnMut() -> E,

impl<L: ExactSizeFallibleLender, F> ExactSizeFallibleLender for Inspect<L, F>

where F: FnMut(&FallibleLend<'_, L>) -> Result<(), L::Error>,

impl<L: ExactSizeFallibleLender, F> ExactSizeFallibleLender for Map<L, F>

where F: for<'all> FnMutHKARes<'all, FallibleLend<'all, L>, L::Error>,

impl<L: ExactSizeFallibleLender, F> ExactSizeFallibleLender for Mutate<L, F>

where F: FnMut(&mut FallibleLend<'_, L>) -> Result<(), L::Error>,

impl<St, E, F> ExactSizeFallibleLender for OnceWith<St, E, F>

where F: for<'all> FnOnceHKA<'all, &'all mut St>,

impl<St, L, E, F> ExactSizeFallibleLender for OnceWithErr<St, L, F>

where L: ?Sized + CovariantFallibleLending, F: FnOnce(&mut St) -> E,