[−][src]Struct tiny_ecs::MapRefMut
Mutable reference container for Persist
returned by Entities::borrow_mut()
This struct is required to contain a hidden borrow to the requested Persist
.
The reason for this is so we can borrow multiple Persist
, but not break the
borrow checker rules for borrows on a single Persist
.
Methods from Deref<Target = Persist<T>>
pub fn len(&self) -> usize
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Returns the actual used length regardless of capacity
pub fn is_empty(&self) -> bool
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pub fn capacity(&self) -> usize
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Returns the storage capacity
pub fn clear(&mut self)
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Clear the storage out while keeping allocated memory
Should not ever panic
pub fn get(&self, index: usize) -> Option<&T>
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pub fn get_mut(&mut self, index: usize) -> Option<&mut T>
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pub fn is_index_live(&self, index: usize) -> bool
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Check if there is a value at this index
pub fn push(&mut self, value: T) -> Option<usize>
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Push T
on to storage.
A push is not guaranteed to push in any
particular order if the internal storage has empty locations (typical after
many remove
). For this reason it will return the index pushed to.
Returns None
if there are no free slots left
pub fn insert(&mut self, index: usize, value: T) -> Option<T>
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Insert T
at location. Returns existing value in that location or None
.
Panics
Will panic is the index is out of range
pub fn pop(&mut self) -> Option<T>
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Pop the last value in the Persist
pub fn remove(&mut self, index: usize) -> Option<T>
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Remove the item at this index and return it if it exists. Does not shift elements after it to the left.
pub fn iter(&self) -> Iter<T>
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pub fn iter_mut(&mut self) -> IterMut<T>
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Trait Implementations
Auto Trait Implementations
impl<'a, T> !RefUnwindSafe for MapRefMut<'a, T>
impl<'a, T> !Send for MapRefMut<'a, T>
impl<'a, T> !Sync for MapRefMut<'a, T>
impl<'a, T> Unpin for MapRefMut<'a, T>
impl<'a, T> !UnwindSafe for MapRefMut<'a, T>
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,