blob: 3e1fd7755393b5e5fff78646cc5f293ee360f870 [file] [log] [blame]
* Copyright (c) 2019, 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 A generic type alias is a declaration [D] of one of the following
* forms:
* m typedef id<X1 extends B1, . . . , Xs extends Bs> = T;
* ...
* [D] introduces a mapping from actual type argument lists to types.
* @description Checks that [D] maps argument list to types when [T] represents
* some function
* @author
import "../../Utils/expect.dart";
class X {}
class Y extends X {}
dynamic checkme1() {}
int? checkme2() {}
X? checkme3() {}
Y? checkme4() {}
typedef Func1<T> = T Function();
typedef Func2<T extends X> = T Function();
main() {
Expect.isTrue(checkme1 is Func1);
Expect.isTrue(checkme2 is Func1);
Expect.isTrue(checkme3 is Func1);
Expect.isTrue(checkme4 is Func1);
Expect.isFalse(checkme1 is Func2);
Expect.isFalse(checkme2 is Func2);
if (hasSoundNullSafety) {
Expect.isFalse(checkme3 is Func2);
Expect.isFalse(checkme4 is Func2);