Struct la_arena::Arena [−][src]
pub struct Arena<T> { /* fields omitted */ }
Expand description
Yet another index-based arena.
Implementations
Creates a new empty arena.
let arena: la_arena::Arena<i32> = la_arena::Arena::new(); assert!(arena.is_empty());
Empties the arena, removing all contained values.
let mut arena = la_arena::Arena::new(); arena.alloc(1); arena.alloc(2); arena.alloc(3); assert_eq!(arena.len(), 3); arena.clear(); assert!(arena.is_empty());
Returns the length of the arena.
let mut arena = la_arena::Arena::new(); assert_eq!(arena.len(), 0); arena.alloc("foo"); assert_eq!(arena.len(), 1); arena.alloc("bar"); assert_eq!(arena.len(), 2); arena.alloc("baz"); assert_eq!(arena.len(), 3);
Returns whether the arena contains no elements.
let mut arena = la_arena::Arena::new(); assert!(arena.is_empty()); arena.alloc(0.5); assert!(!arena.is_empty());
Allocates a new value on the arena, returning the value’s index.
let mut arena = la_arena::Arena::new(); let idx = arena.alloc(50); assert_eq!(arena[idx], 50);
pub fn iter(
&self
) -> impl Iterator<Item = (Idx<T>, &T)> + ExactSizeIterator + DoubleEndedIterator
pub fn iter(
&self
) -> impl Iterator<Item = (Idx<T>, &T)> + ExactSizeIterator + DoubleEndedIterator
Returns an iterator over the arena’s elements.
let mut arena = la_arena::Arena::new(); let idx1 = arena.alloc(20); let idx2 = arena.alloc(40); let idx3 = arena.alloc(60); let mut iterator = arena.iter(); assert_eq!(iterator.next(), Some((idx1, &20))); assert_eq!(iterator.next(), Some((idx2, &40))); assert_eq!(iterator.next(), Some((idx3, &60)));
pub fn iter_mut(
&mut self
) -> impl Iterator<Item = (Idx<T>, &mut T)> + ExactSizeIterator + DoubleEndedIterator
pub fn iter_mut(
&mut self
) -> impl Iterator<Item = (Idx<T>, &mut T)> + ExactSizeIterator + DoubleEndedIterator
Returns an iterator over the arena’s mutable elements.
let mut arena = la_arena::Arena::new(); let idx1 = arena.alloc(20); assert_eq!(arena[idx1], 20); let mut iterator = arena.iter_mut(); *iterator.next().unwrap().1 = 10; drop(iterator); assert_eq!(arena[idx1], 10);
Reallocates the arena to make it take up as little space as possible.
Trait Implementations
Auto Trait Implementations
impl<T> RefUnwindSafe for Arena<T> where
T: RefUnwindSafe,
impl<T> UnwindSafe for Arena<T> where
T: UnwindSafe,
Blanket Implementations
Mutably borrows from an owned value. Read more