Struct UndoStack 

pub struct UndoStack<T> { /* private fields */ }

Undo stack for storing state snapshots.

Implementations

impl<T: Clone> UndoStack<T>

pub fn new() -> Self

Create a new undo stack.

pub fn with_max_size(max_size: usize) -> Self

Create an undo stack with a custom maximum size.

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

Push a state onto the undo stack.

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

Pop the most recent state from the undo stack.

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

Peek at the most recent state without removing it.

pub fn len(&self) -> usize

Get the number of states in the undo stack.

pub fn is_empty(&self) -> bool

Check if the undo stack is empty.

pub fn clear(&mut self)

Clear all states from the undo stack.

pub fn states(&self) -> impl Iterator<Item = &T>

Get all states (for debugging/testing).

pub fn get(&self, index: usize) -> Option<&T>

Get state at index (0 is oldest, len-1 is most recent).

pub fn can_undo(&self) -> bool

Check if we can undo.

pub fn undo_to(&mut self, target_len: usize) -> Vec<T>

Undo to a specific index, returning all popped states.

Trait Implementations

impl<T: Clone> Clone for UndoStack<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for UndoStack<T>

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

Formats the value using the given formatter.

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

fn default() -> Self

Returns the “default value” for a type.