dart-sdk/tests/language/const/cast4_test.dart
Robert Nystrom e736495eb7 Migrate language_2/const to NNBD.
Change-Id: I464275799b3e7a21326d35503b776f9c1101a599
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/141764
Commit-Queue: Bob Nystrom <rnystrom@google.com>
Reviewed-by: Bob Nystrom <rnystrom@google.com>
Reviewed-by: Erik Ernst <eernst@google.com>
Auto-Submit: Bob Nystrom <rnystrom@google.com>
2020-04-03 00:56:36 +00:00

27 lines
556 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.
/// Casts in constants correctly substitute type variables.
class A {
const A();
}
class B implements A {
const B();
}
class M<T extends A> {
final T a;
const M(dynamic t) : a = t; // adds implicit cast `as T`
}
class N<S extends A> extends M<S> {
const N(dynamic t) : super(t);
}
main() {
print(const N<B>(const B()));
}