LanguageFeatures/Control-flow-collections/syntax_A01_t03.dart

// Copyright (c) 2018, 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 Each element in a list can be one of a few things:
///  A normal expression.
///  An if element.
///  A for element.
///  The body of if and for elements use listElement, not expression, which
///  allows nesting.
///
/// @description Checks that each element in the list can be a normal expression,
/// 'if' element or 'await for' element
/// @author sgrekhov@unipro.ru

import "dart:async";
import "../../Utils/expect.dart";

Stream<int> stream =  Stream<int>.fromIterable([1, 2, 3]);
Stream<int> stream2 =  Stream<int>.fromIterable([4, 5, 6]);

main() async {
  bool b = true;

  List<int> listInt = [
    3, 1, 4,
    if (b) await for (var v in stream) v + 1,
    if (!b) 1,
    await for (var i in stream2) if (!i.isEven) i
  ];
  Expect.listEquals([3, 1, 4, 2, 3, 4, 5], listInt);
}