// https://github.com/tc39/proposal-iterator-helpers
var $ = require('../internals/export');
-var path = require('../internals/path');
-var aFunction = require('../internals/a-function');
+var apply = require('../internals/function-apply');
var anObject = require('../internals/an-object');
var toObject = require('../internals/to-object');
+var isPrototypeOf = require('../internals/object-is-prototype-of');
+var IteratorPrototype = require('../internals/iterators-core').IteratorPrototype;
var createIteratorProxy = require('../internals/iterator-create-proxy');
+var getIterator = require('../internals/get-iterator');
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 IteratorProxy = createIteratorProxy(function (args) {
+ var result = anObject(apply(this.next, this.iterator, args));
var done = this.done = !!result.done;
if (!done) return result.value;
}, true);
var object = toObject(O);
var usingIterator = getIteratorMethod(object);
var iterator;
- if (usingIterator != null) {
- iterator = aFunction(usingIterator).call(object);
- if (iterator instanceof Iterator) return iterator;
+ if (usingIterator) {
+ iterator = getIterator(object, usingIterator);
+ if (isPrototypeOf(IteratorPrototype, iterator)) return iterator;
} else {
iterator = object;
- } return new IteratorProxy({
- iterator: iterator
- });
+ } return new IteratorProxy({ iterator: iterator });
}
});