Enum Entry

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

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

This enum is returned from the entry method on TypeMap.

Variants

Occupied(OccupiedEntry<'a, V>)

An occupied entry

Vacant(VacantEntry<'a, V>)

A vacant entry

Implementations

impl<'a, V: Any> Entry<'a, V>

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

Inserts a value if empty, then returns a mutable reference.

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

Inserts a value if empty using the given function, then returns a mutable reference.

Trait Implementations

impl<'a, V: Any + Debug> Debug for Entry<'a, V>

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

Formats the value using the given formatter.