pub fn spread_item<A: IVm>(v: Any<A>) -> Result<ArrayItem<A>, Any<A>>Expand description
A spread item, ...b in [a, ...b]. Take its iterator before the next
operand is evaluated: generated item lists propagate this Result with
? at the item’s position. Iteration itself cannot throw or run represented
code for the VM’s immutable arrays and strings (IteratorRecord).