Enum Entry

pub enum Entry<'a> {
    Occupied(OccupiedEntry<'a>),
    Vacant(VacantEntry<'a>),
}

A view into a single entry in a map, which may either be vacant or occupied.

This enum is constructed from the entry method on HashMap.

Variants

Occupied(OccupiedEntry<'a>)

An occupied entry.

Vacant(VacantEntry<'a>)

A vacant entry.

Implementations

impl<'a> Entry<'a>

pub fn key(&self) -> &str

Returns a reference to this entry’s key.

pub fn or_insert(self, default: Bson) -> &'a mut Bson

Inserts the given default value in the entry if it is vacant and returns a mutable reference to it. Otherwise a mutable reference to an already existent value is returned.

pub fn or_insert_with<F: FnOnce() -> Bson>(self, default: F) -> &'a mut Bson

Inserts the result of the default function in the entry if it is vacant and returns a mutable reference to it. Otherwise a mutable reference to an already existent value is returned.