Struct UndoCap 

pub struct UndoCap {
    pub max_count: usize,
    pub max_bytes: usize,
}

The history bound for an UndoStack: a unit-count cap and a total snapshot byte-size cap (TR-011, TR-024).

Both caps are enforced — whichever binds first drops the oldest unit — so history stays bounded by count on small edits and by size on large buffers. A misconfigured (zero) cap is never honored as “unbounded”: construct via UndoCap::new, which falls back to the defaults for a zero field.

Fields

max_count: usize

Maximum number of undo units retained (>= 1).

max_bytes: usize

Maximum total retained snapshot byte-size, in bytes (>= 1).

Implementations

impl UndoCap

pub fn new(max_count: usize, max_bytes: usize) -> Self

Build a cap, falling back to the default for any zero field so the bound is never unbounded (TR-024: a misconfigured cap reverts to default).

Trait Implementations

impl Clone for UndoCap

fn clone(&self) -> UndoCap

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for UndoCap

impl Debug for UndoCap

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

Formats the value using the given formatter.

impl Default for UndoCap

fn default() -> Self

Returns the “default value” for a type.

impl Eq for UndoCap

impl PartialEq for UndoCap

fn eq(&self, other: &UndoCap) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for UndoCap