Struct History 

pub struct History<T> {
    items: VecDeque<T>,
    current_index: Option<usize>,
    max_size: usize,
}

Generic history structure with back/forward navigation.

Fields

items: VecDeque<T>

Items in history

current_index: Option<usize>

Current index in history

max_size: usize

Maximum size of history

Implementations

impl<T: Clone> History<T>

pub fn new(max_size: usize) -> Self

Create a new history with specified maximum size.

pub fn push(&mut self, item: T)

Push a new item to history.

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

Go back to previous item.

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

Go forward to next item.

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

Get current item.

pub fn can_go_back(&self) -> bool

Check if can go back.

pub fn can_go_forward(&self) -> bool

Check if can go forward.

pub fn len(&self) -> usize

Get the number of items in history.

pub fn is_empty(&self) -> bool

Check if history is empty.

pub fn clear(&mut self)

Clear all history.

Trait Implementations

impl<T: Clone> Clone for History<T>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for History<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T: Clone> Default for History<T>

fn default() -> Self

Returns the “default value” for a type.