Function createDeepMap

core/utils/deepMap.ts:34–109

({
  checkEquality = false,
  useWeakMap = false,
}: Options = {})

 * }); // 42
 */
export function createDeepMap<V>({
  checkEquality = false,
  useWeakMap = false,
}: Options = {}) {
  const MapToUse = useWeakMap ? WeakMap : Map;
  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  const root = new MapToUse<any, unknown>();
  if (checkEquality) {
    root.set(equalReuserSymbol, createValueReuser());
  }

  function getFinalTargetMap(path: unknown[]) {
    let currentTarget = root;

    for (let part of path) {
      if (part === undefined) part = undefinedSymbol;
      if (checkEquality) {
        const currentReuser = currentTarget.get(
          equalReuserSymbol
        ) as EqualValueReuser;
        part = currentReuser(part);
      }

      if (currentTarget.has(part)) {
        currentTarget = currentTarget.get(part) as AnyMap;
        continue;
      }

      const nestedMap = new MapToUse();

      if (checkEquality) {
        nestedMap.set(equalReuserSymbol, createValueReuser());
      }

      currentTarget.set(part, nestedMap);

      currentTarget = nestedMap;
    }

    return currentTarget;
  }

  function has(path: unknown[]) {
    const targetMap = getFinalTargetMap(path);

    return targetMap.has(targetSymbol);
  }

  function set(path: unknown[], value: V) {
    const targetMap = getFinalTargetMap(path);

    targetMap.set(targetSymbol, value);
  }

  function get(path: unknown[]) {
    const targetMap = getFinalTargetMap(path);

    return targetMap.get(targetSymbol) as V | undefined;