blob: 2dfaeb8139a7c65b6d4336be85d4870ad55f16e2 [file] [log] [blame]
* Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
* for details. All rights reserved. Use of this source code is governed by a
* BSD-style license that can be found in the LICENSE file.
* @assertion Execution of a statement s of the form yield* e; proceeds as
* follows:
* First, the expression e is evaluated to an object o.
* If the immediately enclosing function m is marked sync*, then:
* 1. It is a dynamic error if the class of o does not implement Iterable.
* Otherwise
* 2. The method iterator is invoked upon o returning an object i.
* 3. The moveNext method of i is invoked on it with no arguments. If moveNext
* returns false execution of s is complete. Otherwise
* 4. The getter current is invoked on i. If the invocation raises an
* exception ex, execution of s throws ex. Otherwise, the result x of the
* getter invocation is added to the iterable associated with m. Execution of
* the function m immediately enclosing s is suspended until the nullary method
* moveNext() is invoked upon the iterator used to initiate the current
* invocation of m, at which point execution of s continues at 3.
* 5. The current call to moveNext() returns true.
* @description Check that the method moveNext of i is invoked on it
* with no arguments.
* @author
import '../../../../Utils/expect.dart';
class IteratorStub extends Iterator<int> {
int _moveNextCallCount;
IteratorStub() {
_moveNextCallCount = 0;
int get current => _moveNextCallCount;
bool moveNext() {
return true;
class IterableStub extends Iterable<int> {
Iterator<int> get iterator => new IteratorStub();
Iterable generator(Iterable iterable) sync* {
yield* iterable;
test1() {
IterableStub its = new IterableStub();
Expect.equals(1, generator(its).first);
test2() {
IterableStub its = new IterableStub();
Iterable g = generator(its);
Iterator i = g.iterator;
Expect.equals(1, i.current);
Expect.equals(2, i.current);
Expect.equals(3, i.current);
main() {