dart-sdk/tests/language/interface/implements_futureor_test.dart
Brian Wilkerson 1d64ba0429 Merge 4 diagnostics for the purpose of documentation
Change-Id: I7e7a50ad924af9d200333d2d1640e3f8cd97a88f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151873
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>
2020-06-23 17:46:02 +00:00

16 lines
481 B
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> {}
// ^^^^^^^^^^^
// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
// ^
// [cfe] The type 'FutureOr' can't be used in an 'implements' clause.
void main() {
A a = new A();
}