AsyncIterator.reduce types improvements

Author: slowcheetah

packages/core-js-types/src/base/proposals/async-iterator-helpers.d.ts

@@ -65,13 +65,20 @@ interface AsyncIterator<T, TReturn = any, TNext = any> {
    */
   map<U>(mapper: (value: T, index: number) => U): AsyncIteratorObject<U, undefined, unknown>;
 
+  /**
+   * Reduces the elements of the iterator to a single value using the `reducer` function.
+   * @param reducer - A function that combines two elements of the iterator
+   * @param initialValue - The initial value to start the accumulation. Required when the accumulator type differs from the element type.
+   * @returns A `Promise` that resolves to the reduced value
+   */
+  reduce<U>(reducer: (accumulator: U, value: T, index: number) => U, initialValue: U): Promise<U>;
+
   /**
    * Reduces the elements of the iterator to a single value using the `reducer` function.
    * @param reducer - A function that combines two elements of the iterator
    * @param initialValue - An optional initial value to start the reduction
    * @returns A `Promise` that resolves to the reduced value
    */
-  reduce<U>(reducer: (accumulator: U, value: T, index: number) => U, initialValue?: U): Promise<U>;
   reduce(reducer: (accumulator: T, value: T, index: number) => T, initialValue?: T): Promise<T>;
 
   /**

packages/core-js-types/src/base/pure/proposals/async-iterator-helpers.d.ts

@@ -73,6 +73,23 @@ declare namespace CoreJS {
     /**
      * Reduces the elements of the iterator to a single value using the `reducer` function.
      * @param reducer - A function that combines two elements of the iterator
+     * @param initialValue - The initial value to start the accumulation. Required when the accumulator type differs from the element type.
+     * @returns A `Promise` that resolves to the reduced value
+     */
+
+    reduce<U>(reducer: (accumulator: U, value: T, index: number) => U, initialValue: U): CoreJSPromise<U>;
+    /**
+     * Reduces the elements of the iterator to a single value using the `reducer` function.
+     * @param reducer - A function that combines two elements of the iterator
+     * @param initialValue - An optional initial value to start the reduction
+     * @returns A `Promise` that resolves to the reduced value
+     */
+    reduce(reducer: (accumulator: T, value: T, index: number) => T, initialValue?: T): CoreJSPromise<T>;
+
+    /**
+     * Reduces the elements of the iterator to a single value using the `reducer` function.
+     * For maximum flexibility with any types.
+     * @param reducer - A function that combines two elements of the iterator
      * @param initialValue - An optional initial value to start the reduction
      * @returns A `Promise` that resolves to the reduced value
      */

packages/core-js-types/src/ts5-2/proposals/async-iterator-helpers.d.ts

@@ -66,6 +66,23 @@ interface AsyncIterator<T, TReturn = any, TNext = undefined> {
   /**
    * Reduces the elements of the iterator to a single value using the `reducer` function.
    * @param reducer - A function that combines two elements of the iterator
+   * @param initialValue - The initial value to start the accumulation. Required when the accumulator type differs from the element type.
+   * @returns A `Promise` that resolves to the reduced value
+   */
+  reduce<U>(reducer: (accumulator: U, value: T, index: number) => U, initialValue: U): Promise<U>;
+
+  /**
+   * Reduces the elements of the iterator to a single value using the `reducer` function.
+   * @param reducer - A function that combines two elements of the iterator
+   * @param initialValue - An optional initial value to start the reduction
+   * @returns A `Promise` that resolves to the reduced value
+   */
+  reduce(reducer: (accumulator: T, value: T, index: number) => T, initialValue?: T): Promise<T>;
+
+  /**
+   * Reduces the elements of the iterator to a single value using the `reducer` function.
+   * For maximum flexibility with any types.
+   * @param reducer - A function that combines two elements of the iterator
    * @param initialValue - An optional initial value to start the reduction
    * @returns A `Promise` that resolves to the reduced value
    */

packages/core-js-types/src/ts5-2/pure/proposals/async-iterator-helpers.d.ts

@@ -72,6 +72,23 @@ declare namespace CoreJS {
     /**
      * Reduces the elements of the iterator to a single value using the `reducer` function.
      * @param reducer - A function that combines two elements of the iterator
+     * @param initialValue - The initial value to start the accumulation. Required when the accumulator type differs from the element type.
+     * @returns A `Promise` that resolves to the reduced value
+     */
+    reduce<U>(reducer: (accumulator: U, value: T, index: number) => U, initialValue: U): CoreJSPromise<U>;
+
+    /**
+     * Reduces the elements of the iterator to a single value using the `reducer` function.
+     * @param reducer - A function that combines two elements of the iterator
+     * @param initialValue - An optional initial value to start the reduction
+     * @returns A `Promise` that resolves to the reduced value
+     */
+    reduce(reducer: (accumulator: T, value: T, index: number) => T, initialValue?: T): CoreJSPromise<T>;
+
+    /**
+     * Reduces the elements of the iterator to a single value using the `reducer` function.
+     * For maximum flexibility with any types.
+     * @param reducer - A function that combines two elements of the iterator
      * @param initialValue - An optional initial value to start the reduction
      * @returns A `Promise` that resolves to the reduced value
      */