blob: 0c0e66281074807c1a8f424d7d91a0060b3b257b [file] [log] [blame]
// Copyright (c) 2020, 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 The NORM relation defines the canonical representative of classes
/// of equivalent types...
/// This is based on the following equations:
/// FutureOr<T> == T if Future<T> <: T
/// @description Checks that if Future<T> <: T then FutureOr<T> == T
/// @author
// Requirements=nnbd-strong
import 'dart:async';
class A<X> {}
class B<X> implements A<X> {}
class CO extends B<FutureOr<Object>> implements A<Object> {}
class CD extends B<FutureOr<dynamic>> implements A<dynamic> {}
class CV extends B<FutureOr<void>> implements A<void> {}
main() {
new CO();
new CD();
new CV();