mirror of
https://github.com/dart-lang/sdk
synced 2024-11-02 09:43:08 +00:00
ad9c73cb32
Closes #41698 Change-Id: Iea87c770b560f6f72f9382f06615d99ad2be0c3a Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/155764 Commit-Queue: Johnni Winther <johnniwinther@google.com> Reviewed-by: Paul Berry <paulberry@google.com>
67 lines
1.8 KiB
Dart
67 lines
1.8 KiB
Dart
// Copyright (c) 2017, 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 "package:expect/expect.dart";
|
|
|
|
void block_test() {
|
|
List<Object> Function() g;
|
|
g = () {
|
|
return [3];
|
|
};
|
|
Expect.isTrue(g is List<Object> Function());
|
|
Expect.isFalse(g is List<int> Function());
|
|
g().add("hello"); // No runtime error
|
|
List<int> l = [3];
|
|
g = () {
|
|
return l;
|
|
};
|
|
Expect.isTrue(g is List<Object> Function());
|
|
Expect.isTrue(g is List<int> Function());
|
|
Expect.throwsTypeError(() {
|
|
g().add("hello"); // runtime error
|
|
});
|
|
dynamic o = l;
|
|
g = () {
|
|
return o;
|
|
}; // No implicit downcast on the assignment, implicit downcast on the return
|
|
Expect.isTrue(g is List<Object> Function());
|
|
Expect.isFalse(g is List<int> Function());
|
|
Expect.isTrue(g is Object Function());
|
|
g(); // No runtime error;
|
|
o = 3;
|
|
Expect.throwsTypeError(() {
|
|
g(); // Failed runtime cast on the return type of f
|
|
});
|
|
}
|
|
|
|
void arrow_test() {
|
|
List<Object> Function() g;
|
|
g = () => [3];
|
|
Expect.isTrue(g is List<Object> Function());
|
|
Expect.isFalse(g is List<int> Function());
|
|
g().add("hello"); // No runtime error
|
|
List<int> l = [3];
|
|
g = () => l;
|
|
Expect.isTrue(g is List<Object> Function());
|
|
Expect.isTrue(g is List<int> Function());
|
|
Expect.throwsTypeError(() {
|
|
g().add("hello"); // runtime error
|
|
});
|
|
dynamic o = l;
|
|
g = () =>
|
|
o; // No implicit downcast on the assignment, implicit downcast on the return
|
|
Expect.isTrue(g is List<Object> Function());
|
|
Expect.isFalse(g is List<int> Function());
|
|
Expect.isTrue(g is Object Function());
|
|
g(); // No runtime error;
|
|
o = 3;
|
|
Expect.throwsTypeError(() {
|
|
g(); // Failed runtime cast on the return type of f
|
|
});
|
|
}
|
|
|
|
main() {
|
|
block_test();
|
|
arrow_test();
|
|
}
|