+++ /dev/null
-// https://github.com/tc39/proposal-iterator-helpers
-var $ = require('../internals/export');
-var path = require('../internals/path');
-var aFunction = require('../internals/a-function');
-var anObject = require('../internals/an-object');
-var toObject = require('../internals/to-object');
-var createIteratorProxy = require('../internals/iterator-create-proxy');
-var getIteratorMethod = require('../internals/get-iterator-method');
-
-var Iterator = path.Iterator;
-
-var IteratorProxy = createIteratorProxy(function (arg) {
- var result = anObject(this.next.call(this.iterator, arg));
- var done = this.done = !!result.done;
- if (!done) return result.value;
-}, true);
-
-$({ target: 'Iterator', stat: true }, {
- from: function from(O) {
- var object = toObject(O);
- var usingIterator = getIteratorMethod(object);
- var iterator;
- if (usingIterator != null) {
- iterator = aFunction(usingIterator).call(object);
- if (iterator instanceof Iterator) return iterator;
- } else {
- iterator = object;
- } return new IteratorProxy({
- iterator: iterator
- });
- }
-});