dart-sdk/tests/language/function_subtype/typearg3_test.dart
Robert Nystrom b955271e51 Migrate language_2/function_subtype to NNBD.
Change-Id: I8d41ad649c83cd97253006693a0cf3676de418e9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/145542
Commit-Queue: Bob Nystrom <rnystrom@google.com>
Reviewed-by: Erik Ernst <eernst@google.com>
Auto-Submit: Bob Nystrom <rnystrom@google.com>
2020-05-05 16:52:30 +00:00

23 lines
531 B
Dart

// Copyright (c) 2013, 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.
// Dart test program for constructors and initializers.
// Check function subtyping of type arguments.
import 'package:expect/expect.dart';
class C<T> {}
class I {}
class J extends I {}
typedef J f1();
typedef I f2();
main() {
Expect.isTrue(new C<f1>() is C<f2>);
Expect.isFalse(new C<f2>() is C<f1>);
}