michael@0: // yield* calls @@iterator on the iterable to produce the iterator.
michael@0: 
michael@0: var log = '';
michael@0: 
michael@0: function IteratorWrapper(iterator) {
michael@0:     return {
michael@0:         next: function (val) {
michael@0:             log += 'n';
michael@0:             return iterator.next(val);
michael@0:         },
michael@0: 
michael@0:         throw: function (exn) {
michael@0:             log += 't';
michael@0:             return iterator.throw(exn);
michael@0:         }
michael@0:     };
michael@0: }
michael@0: 
michael@0: function IterableWrapper(iterable) {
michael@0:     var ret = {};
michael@0: 
michael@0:     ret[std_iterator] = function () {
michael@0:         log += 'i';
michael@0:         return IteratorWrapper(iterable[std_iterator]());
michael@0:     }
michael@0: 
michael@0:     return ret;
michael@0: }
michael@0: 
michael@0: function* delegate(iter) { return yield* iter; }
michael@0: 
michael@0: var iter = delegate(IterableWrapper([1, 2, 3]));
michael@0: assertIteratorNext(iter, 1);
michael@0: assertIteratorNext(iter, 2);
michael@0: assertIteratorNext(iter, 3);
michael@0: assertIteratorDone(iter, undefined);
michael@0: 
michael@0: assertEq(log, 'innnn');
michael@0: 
michael@0: iter = delegate([1, 2, 3]);
michael@0: assertIteratorNext(iter, 1);
michael@0: assertIteratorNext(iter, 2);
michael@0: assertIteratorNext(iter, 3);
michael@0: assertIteratorDone(iter, undefined);
michael@0: 
michael@0: assertEq(log, 'innnn');
michael@0: 
michael@0: if (typeof reportCompare == "function")
michael@0:     reportCompare(true, true);