Trait ItemToKey 

pub trait ItemToKey<Key: ?Sized>: for<'lend> LendItem<'lend> {
    // Required method
    fn item_to_key(item: LentItem<'_, Self>) -> &Key;
}

Convert one of the items of an iterator into a Key reference, intended for use with a SeekableLendingIterator.

This conversion is expected to be cheap.

Required Methods

fn item_to_key(item: LentItem<'_, Self>) -> &Key

Convert one of the items of an iterator into a Key reference, intended for use with a SeekableLendingIterator.

This conversion is expected to be cheap.

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<Key, Cmp, Iter> ItemToKey<Key> for MergingIter<Key, Cmp, Iter>

where Key: ?Sized, Iter: ItemToKey<Key>,

Available on crate feature alloc only.