Struct BindingCell 

pub struct BindingCell { /* private fields */ }

A reference-shared mutable binding slot captured from a lexical scope.

Cloned cells point at the same slot, so writes through one handle are visible through every other handle for the same lexical binding. Closure languages use this shape for boxed upvalues and closed-over mutable locals.

Implementations

impl BindingCell

pub fn uninitialized(name: Symbol) -> Self

Creates an uninitialized cell.

pub fn initialized(name: Symbol, value: Value) -> Self

Creates an initialized mutable cell.

pub fn immutable(name: Symbol, value: Value) -> Self

Creates an immutable initialized cell.

pub fn live_alias(name: Symbol, target: BindingCell) -> Self

Creates a live alias which follows reads and writes to target.

pub fn name(&self) -> &Symbol

Returns the binding name associated with this cell.

pub fn get(&self) -> Result<Value>

Reads the cell’s current value.

Errors if the captured slot is still uninitialized.

pub fn set(&self, value: Value) -> Result<()>

Replaces the cell’s current value.

pub fn delete(&self) -> Result<()>

Deletes this cell. A deleted cell cannot be read or reinitialized.

pub fn state(&self) -> Result<BindingCellState>

Returns a snapshot of the cell’s current state.

Trait Implementations

impl Clone for BindingCell

fn clone(&self) -> BindingCell

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BindingCell

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

Formats the value using the given formatter.