Enum Entry

pub enum Entry<'a, T: ComponentValue> {
    Vacant(VacantEntry<'a, T>),
    Occupied(OccupiedEntry<'a, T>),
}

Entry like api for an entity’s component

Variants

Vacant(VacantEntry<'a, T>)

A vacant entry

Occupied(OccupiedEntry<'a, T>)

An occupied entry

Implementations

impl<'a, T> Entry<'a, T>

where T: ComponentValue,

pub fn and_modify(self, func: impl FnMut(&mut T)) -> Self

Mutate the value in place

pub fn or_insert(self, value: T) -> RefMut<'a, T>

Returns the contained component or inserts a default.

pub fn or_default(self) -> RefMut<'a, T>

where T: Default,

Return the component in the entry or insert the default value.

pub fn or_insert_with(self, func: impl FnOnce() -> T) -> RefMut<'a, T>

Returns the contained component or inserts a default provided by the function.

pub fn set(self, value: T) -> Option<T>

Replaces the current value and returns it