Language/Expressions/Function_Invocation/sync_generator_invokation_t02.dart

// 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 If f is marked sync*, then a fresh instance i implementing
/// the built-in class Iterable is associated with the invocation and
/// immediately returned.
///    A Dart implementation will need to provide a specific implementation of
///  Iterable that will be returned by sync* methods. A typical strategy would
///  be to produce an instance of a subclass of class IterableBase defined in
///  dart:core. The only method that needs to be added by the Dart
///  implementation in that case is iterator.
///
/// @description Check that body of sync generator function is not executed
/// before Iterable instance is returned.
///
/// @author a.semenov@unipro.ru


import '../../../Utils/expect.dart';

bool bodyExecuted = false;

Iterable test() sync* {
  bodyExecuted = true;
  yield 1;
}

main() {
  for (var i = 0; i < 10; i++) {
    test();
    Expect.isFalse(bodyExecuted);
  }
}