blob: f9dabaf20acb0ff92060c4292f1f0f32a397cf1a [file] [log] [blame]
* 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.
* @assertion An expression of the form [e as T] is accepted as a potentially
* and compile-time constant expression if [e] is potentially constant or
* compile-time constant, respectively, and [T] is a compile-time constant type.
* A compile-time constant type means any type that doesn't contain free type
* variables, so the type expression always resolves to the exact same type.
* @description Checks that an expression of the form [e as T] is accepted if
* [e] is potentially constant
* @author
import "../../Utils/expect.dart";
class A {
const A();
class B extends A {
const B();
class MyClass {
final A a;
const MyClass(Object o) : a = o as A;
main() {
const MyClass c1 = MyClass(A());
Expect.isTrue(c1.a is A);
const MyClass c2 = MyClass(B());
Expect.isTrue(c2.a is B);