Struct polars_core::utils::Arena

pub struct Arena<T> { /* fields omitted */ }

This is supported on crate feature private only.

Implementations

impl<T> Arena<T>

Simple Arena implementation Allocates memory and stores item in a Vec. Only deallocates when being dropped itself.

pub fn add(&mut self, val: T) -> Node

pub fn pop(&mut self) -> Option<T>

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn new() -> Self

pub fn with_capacity(cap: usize) -> Self

pub fn get_node(&self, val: &T) -> Option<Node>

pub fn get(&self, idx: Node) -> &T

pub fn get_mut(&mut self, idx: Node) -> &mut T

pub fn replace(&mut self, idx: Node, val: T)

impl<T: Default> Arena<T>

pub fn take(&mut self, idx: Node) -> T

pub fn replace_with<F>(&mut self, idx: Node, f: F) where
    F: FnOnce(T) -> T, 

pub fn try_replace_with<F>(&mut self, idx: Node, f: F) -> Result<()> where
    F: FnMut(T) -> Result<T>, 

Trait Implementations

impl<T: Clone> Clone for Arena<T>

fn clone(&self) -> Arena<T>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> Default for Arena<T>

fn default() -> Self

Returns the “default value” for a type.