mirror of
https://github.com/dart-lang/sdk
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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>
68 lines
1.8 KiB
Dart
68 lines
1.8 KiB
Dart
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import "package:expect/expect.dart";
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void block_test() {
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List<Object> Function() g;
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g = () {
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return [3];
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};
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Expect.isTrue(g is List<Object> Function());
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Expect.isFalse(g is List<int> Function());
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g().add("hello"); // No runtime error
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List<int> l = [3];
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g = () {
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return l;
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};
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Expect.isTrue(g is List<Object> Function());
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Expect.isTrue(g is List<int> Function());
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Expect.throwsTypeError(() {
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g().add("hello"); // runtime error
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});
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dynamic o = l;
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g = () {
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return o;
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}; // No implicit downcast on the assignment, implicit downcast on the return
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Expect.isTrue(g is List<Object> Function());
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Expect.isFalse(g is List<int> Function());
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Expect.isTrue(g is Object Function());
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g(); // No runtime error;
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o = 3;
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Expect.throwsTypeError(() {
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g(); // Failed runtime cast on the return type of f
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});
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}
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void arrow_test() {
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List<Object> Function() g;
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g = () => [3];
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Expect.isTrue(g is List<Object> Function());
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Expect.isFalse(g is List<int> Function());
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g().add("hello"); // No runtime error
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List<int> l = [3];
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g = () => l;
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Expect.isTrue(g is List<Object> Function());
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Expect.isTrue(g is List<int> Function());
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Expect.throwsTypeError(() {
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g().add("hello"); // runtime error
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});
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dynamic o = l;
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g = () =>
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o; // No implicit downcast on the assignment, implicit downcast on the return
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Expect.isTrue(g is List<Object> Function());
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Expect.isFalse(g is List<int> Function());
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Expect.isTrue(g is Object Function());
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g(); // No runtime error;
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o = 3;
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Expect.throwsTypeError(() {
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g(); // Failed runtime cast on the return type of f
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});
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}
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main() {
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block_test();
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arrow_test();
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}
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