Struct rustc_ast_pretty::pp::ring::RingBuffer

pub struct RingBuffer<T> {
    data: VecDeque<T>,
    offset: usize,
}

A view onto a finite range of an infinitely long sequence of T.

The Ts are indexed 0..infinity. A RingBuffer begins as a view of elements 0..0 (i.e. nothing). The user of the RingBuffer advances its left and right position independently, although only in the positive direction, and only with left <= right at all times.

Holding a RingBuffer whose view is elements left..right gives the ability to use Index and IndexMut to access elements i in the infinitely long queue for which left <= i < right.

Fields

data: VecDeque<T>

offset: usize

Implementations

impl<T> RingBuffer<T>

pub fn new() -> Self

pub fn is_empty(&self) -> bool

pub fn push(&mut self, value: T) -> usize

pub fn clear(&mut self)

pub fn index_of_first(&self) -> usize

pub fn first(&self) -> Option<&T>

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

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

pub fn last(&self) -> Option<&T>

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

Trait Implementations

impl<T> Index<usize> for RingBuffer<T>

type Output = T

The returned type after indexing.

fn index(&self, index: usize) -> &Self::Output

Performs the indexing (container[index]) operation.

impl<T> IndexMut<usize> for RingBuffer<T>

fn index_mut(&mut self, index: usize) -> &mut Self::Output

Performs the mutable indexing (container[index]) operation.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 40 bytes