Struct StoredLen 

pub struct StoredLen { /* private fields */ }

Stored length with rollback support.

The current length is shared (via SharedLen) so clones see updates, but previous length is local to each instance for independent rollback.

Implementations

impl StoredLen

pub fn new(val: usize) -> Self

Creates a new stored length.

pub fn get(&self) -> usize

Gets the current length.

pub fn set(&self, val: usize)

Sets the current length.

pub fn previous(&self) -> usize

Gets the previous length.

pub fn previous_mut(&mut self) -> &mut usize

Returns a mutable reference to the previous length.

pub fn save(&mut self)

Saves current to previous.

pub fn restore(&self)

Restores previous to current.

Trait Implementations

impl Clone for StoredLen

fn clone(&self) -> StoredLen

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StoredLen

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

Formats the value using the given formatter.

impl Default for StoredLen

fn default() -> Self

Returns the “default value” for a type.