Function makeStack

src/Stack.js:214–222

(size, head, ownerID, hash)

};

function makeStack(size, head, ownerID, hash) {
  const map = Object.create(StackPrototype);
  map.size = size;
  map._head = head;
  map.__ownerID = ownerID;
  map.__hash = hash;
  map.__altered = false;
  return map;
}

let EMPTY_STACK;
function emptyStack() {