| // Copyright (c) 2020, 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 'dart:async'; |
| |
| const Symbol _enabledExperimentsKey = #dartLanguageEnabledExperiments; |
| |
| /// The list of enabled Dart language experiments for the current [Zone]. |
| /// |
| /// This can be overridden for a new [Zone] by using [withEnabledExperiments]. |
| List<String> get enabledExperiments => |
| Zone.current[_enabledExperimentsKey] as List<String>? ?? const []; |
| |
| /// Runs [fn] in a [Zone], setting [enabledExperiments] for all code running |
| /// in that [Zone]. |
| T withEnabledExperiments<T>(T Function() fn, List<String> enabledExperiments) => |
| runZoned(fn, zoneValues: {_enabledExperimentsKey: enabledExperiments}); |
