Struct std::collections::btree_map::VacantEntry

pub struct VacantEntry<'a, K, V> where K: 'a, V: 'a {
    // some fields omitted
}

A vacant Entry.

Methods

impl<'a, K, V> VacantEntry<'a, K, V> where K: Ord

fn key(&self) -> &K

Gets a reference to the key that would be used when inserting a value through the VacantEntry.

fn into_key(self) -> K

Unstable (map_entry_recover_keys #34285)

Take ownership of the key.

fn insert(self, value: V) -> &'a mut V

Sets the value of the entry with the VacantEntry's key, and returns a mutable reference to it.

Trait Implementations

impl<'a, K, V> Debug for VacantEntry<'a, K, V> where K: 'a + Ord + Debug, V: 'a

fn fmt(&self, f: &mut Formatter) -> Result<(), Error>

Formats the value using the given formatter.