Enum UpValState 

pub enum UpValState {
    Open {
        thread_id: usize,
        idx: StackIdx,
    },
    Closed(LuaValue),
}

Discriminator state for an upvalue: either still pointing at a thread’s stack slot, or owning the value after close.

Retained as the public read-side enum for out-of-crate consumers that pattern-match through UpVal::slot(). The canonical storage on UpVal is now a Cell-tagged shape; the RefCell<UpValState> mirror is updated in lockstep so existing slot() callers keep working.

Variants

Open

Fields

thread_id: usize

idx: StackIdx

Closed(LuaValue)

Trait Implementations

impl Clone for UpValState

fn clone(&self) -> UpValState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UpValState

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

Formats the value using the given formatter.