Enum Entry 

pub enum Entry<'a, I, T, SA: Allocator = Global, DA: Allocator = Global> {
    Vacant(VacantEntry<'a, I, T, SA, DA>),
    Occupied(OccupiedEntry<'a, I, T, SA, DA>),
}

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

This is constructed from the SparseSet::entry function.

Variants

Vacant(VacantEntry<'a, I, T, SA, DA>)

A vacant entry.

Occupied(OccupiedEntry<'a, I, T, SA, DA>)

An occupied entry.

Implementations

impl<'a, I: SparseSetIndex, T, SA: Allocator, DA: Allocator> Entry<'a, I, T, SA, DA>

pub fn and_modify<F: FnOnce(&mut T)>(self, function: F) -> Self

Provides in-place mutable access to an occupied entry before any potential inserts into the sparse set.

pub fn entry_index(&self) -> I

The index used to create this entry.

pub fn or_insert(self, default: T) -> &'a mut T

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() -> T>(self, default: F) -> &'a mut T

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.

pub fn insert_entry(self, value: T) -> OccupiedEntry<'a, I, T, SA, DA>

Sets the value of the entry, and returns an OccupiedEntry.

Trait Implementations

impl<I: Debug + SparseSetIndex, T: Debug, SA: Allocator, DA: Allocator> Debug for Entry<'_, I, T, SA, DA>

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

Formats the value using the given formatter.