Trait Iterator 

pub trait Iterator<K: KeyExt, V: ValueExt> {
    // Required methods
    fn next(&mut self);
    fn rewind(&mut self);
    fn seek<Q: KeyExt>(&mut self, key: Q);
    fn entry(&self) -> Option<(K, V)>;
    fn key(&self) -> Option<K>;
    fn val(&self) -> Option<V>;
    fn valid(&self) -> bool;

    // Provided methods
    fn size_hint(&self) -> (usize, Option<usize>) { ... }
    fn count(&self) -> usize
       where Self: Sized { ... }
}

Custom iterator

Required Methods

fn next(&mut self)

advance to next

fn rewind(&mut self)

reset to 0

fn seek<Q: KeyExt>(&mut self, key: Q)

seek will reset iterator and seek to >= key.

fn entry(&self) -> Option<(K, V)>

Returns the entry of current position

fn key(&self) -> Option<K>

Returns the key of current position

fn val(&self) -> Option<V>

Returns the value of current position

fn valid(&self) -> bool

Returns if the current position has a valid value.

Provided Methods

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

Size hint for this iterator

fn count(&self) -> usize

where Self: Sized,

How many items in this iterator

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