Function dispatch_get_item

compiler/src/main/abi_bridge.rs:127–140

GetItem: built-in indexing only, FFI has no bytecode frame to drive instance `__getitem__` dispatch. */

(recv_h: u32, args: &[Val])

/* GetItem: built-in indexing only, FFI has no bytecode frame to drive instance `__getitem__` dispatch. */
fn dispatch_get_item(recv_h: u32, args: &[Val]) -> Result<Val, VmErr> {
    if args.len() != 1 {
        return Err(VmErr::TypeMsg(s!("get_item expects 1 index, got ", int args.len() as i64)));
    }
    let idx = args[0];
    with_recv("edge_op get_item: invalid receiver handle", recv_h, |vm, recv| {
        let stack_before = vm.stack.len();
        let _ = vm.get_item_builtin(recv, idx)?; // Discard the bool (slice-path indicator).
        if vm.stack.len() != stack_before + 1 {
            return Err(VmErr::Runtime("edge_op get_item: get_item left no result"));
        }
        vm.stack.pop().ok_or(VmErr::Runtime("edge_op get_item: stack drained mid-dispatch"))
    })
}

/* SetItem: built-in item-assignment only, same rationale as `dispatch_get_item`. */
fn dispatch_set_item(recv_h: u32, args: &[Val]) -> Result<Val, VmErr> {