Method next

data_structures/unstable_multimap.ts:455–472

()

    let innerIndex = 0;
    const iter: IterableIterator<[K, V]> = {
      next(): IteratorResult<[K, V]> {
        while (true) {
          if (currentList !== null && innerIndex < currentList.length) {
            return {
              value: [currentKey, currentList[innerIndex++]!],
              done: false,
            };
          }
          const outerResult = outer.next();
          if (outerResult.done) {
            currentList = null;
            return { value: undefined, done: true };
          }
          currentKey = outerResult.value[0];
          currentList = outerResult.value[1].slice();
          innerIndex = 0;
        }
      },
      [Symbol.iterator]() {
        return this;
      },