'use strict';
// https://github.com/tc39/proposal-iterator-helpers
var $ = require('../internals/export');
-var aFunction = require('../internals/a-function');
+var call = require('../internals/function-call');
+var aCallable = require('../internals/a-callable');
var anObject = require('../internals/an-object');
var createAsyncIteratorProxy = require('../internals/async-iterator-create-proxy');
-var getAsyncIteratorMethod = require('../internals/get-async-iterator-method');
+var getAsyncIterator = require('../internals/get-async-iterator');
-var AsyncIteratorProxy = createAsyncIteratorProxy(function (arg, Promise) {
+var AsyncIteratorProxy = createAsyncIteratorProxy(function (Promise) {
var state = this;
var mapper = state.mapper;
- var innerIterator, iteratorMethod;
+ var innerIterator;
return new Promise(function (resolve, reject) {
var outerLoop = function () {
try {
- Promise.resolve(anObject(state.next.call(state.iterator, arg))).then(function (step) {
+ Promise.resolve(anObject(call(state.next, state.iterator))).then(function (step) {
try {
if (anObject(step).done) {
state.done = true;
} else {
Promise.resolve(mapper(step.value)).then(function (mapped) {
try {
- iteratorMethod = getAsyncIteratorMethod(mapped);
- if (iteratorMethod !== undefined) {
- state.innerIterator = innerIterator = anObject(iteratorMethod.call(mapped));
- state.innerNext = aFunction(innerIterator.next);
- return innerLoop();
- } reject(TypeError('.flatMap callback should return an iterable object'));
+ state.innerIterator = innerIterator = getAsyncIterator(mapped);
+ state.innerNext = aCallable(innerIterator.next);
+ return innerLoop();
} catch (error2) { reject(error2); }
}, reject);
}
var innerLoop = function () {
if (innerIterator = state.innerIterator) {
try {
- Promise.resolve(anObject(state.innerNext.call(innerIterator))).then(function (result) {
+ Promise.resolve(anObject(call(state.innerNext, innerIterator))).then(function (result) {
try {
if (anObject(result).done) {
state.innerIterator = state.innerNext = null;
flatMap: function flatMap(mapper) {
return new AsyncIteratorProxy({
iterator: anObject(this),
- mapper: aFunction(mapper),
+ mapper: aCallable(mapper),
innerIterator: null,
innerNext: null
});