Lasse R.H. Nielsen
8760283247
A combination of `runZoned` and `runZonedGuarded` where only the latter allows an `onError` parameter, and only that has a nullable return type. Retains the `onError` parameter on `runZoned` for now because it's too breaking to remove it until packages have been migrated off of it. It will be removed in a follow-up CL. Change-Id: If0e86c8d14e13fa089c66f4af975aeacb2616cf6 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/137302 Reviewed-by: Jake Macdonald <jakemac@google.com> Reviewed-by: Nate Bosch <nbosch@google.com>
35 lines
992 B
Dart
35 lines
992 B
Dart
// Copyright (c) 2013, 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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import 'dart:async';
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import 'package:async_helper/async_helper.dart';
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main() {
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asyncStart();
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// Ensure that `runZoned`'s onError handles synchronous errors but delegates
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// to the next runZoned when the handler returns false.
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bool sawInnerHandler = false;
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try {
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runZonedGuarded(() {
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runZonedGuarded(() {
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throw 0;
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}, (e, s) {
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Expect.equals(0, e);
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sawInnerHandler = true;
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throw e;
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});
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}, (e, s) {
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Expect.equals(0, e);
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Expect.isTrue(sawInnerHandler);
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// If we are waiting for an error, don't asyncEnd, but let it time out.
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throw e; //# 01: ok
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asyncEnd();
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});
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} catch (e) {
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asyncEnd(); return; //# 01: continued
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rethrow;
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}
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}
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