tests/language_2/implements_futureor_test.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.

import 'dart:async';

class A<T>
  implements FutureOr<T> //# 01: compile-time error
{}

void main() {
  A a = new A();
}