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".

Implementors

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

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

Available on crate feature alloc only.