Enum anymap2::Entry

pub enum Entry<'a, A: ?Sized + UncheckedAnyExt, V: 'a> {
    Occupied(OccupiedEntry<'a, A, V>),
    Vacant(VacantEntry<'a, A, V>),
}

A view into a single location in an Map, which may be vacant or occupied.

Variants

Occupied(OccupiedEntry<'a, A, V>)

An occupied Entry

Vacant(VacantEntry<'a, A, V>)

A vacant Entry

Implementations

impl<'a, A: ?Sized + UncheckedAnyExt, V: IntoBox<A>> Entry<'a, A, V>

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

Ensures a value is in the entry by inserting the default if empty, and returns a mutable reference to the value in the entry.

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

Ensures a value is in the entry by inserting the result of the default function if empty, and returns a mutable reference to the value in the entry.

impl<'a, A: ?Sized + UncheckedAnyExt, V: Default + IntoBox<A>> Entry<'a, A, V>

pub fn or_default(self) -> &'a mut V

Ensures a value is in the entry by inserting the default value if empty, and returns a mutable reference to the value in the entry.

Examples

let mut data = AnyMap::new();
{
    let r = data.entry::<i32>().or_default();
    assert_eq!(r, &mut 0);
    *r = 1;
}
assert_eq!(data.get(), Some(&1));
assert_eq!(data.entry::<i32>().or_default(), &mut 1);