pkg/front_end/lib/src/api_prototype/experimental_flags.dart

// Copyright (c) 2018, 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.

// TODO(askesc): Generate this file from a flag specification.

enum ExperimentalFlag {
  constantUpdate2018,
  controlFlowCollections,
  extensionMethods,
  nonNullable,
  setLiterals,
  spreadCollections,
  tripleShift,
}

ExperimentalFlag parseExperimentalFlag(String flag) {
  switch (flag) {
    case "constant-update-2018":
      return ExperimentalFlag.constantUpdate2018;
    case "control-flow-collections":
      return ExperimentalFlag.controlFlowCollections;
    case "extension-methods":
      return ExperimentalFlag.extensionMethods;
    case "non-nullable":
      return ExperimentalFlag.nonNullable;
    case "set-literals":
      return ExperimentalFlag.setLiterals;
    case "spread-collections":
      return ExperimentalFlag.spreadCollections;
    case "triple-shift":
      return ExperimentalFlag.tripleShift;
  }
  return null;
}

const Map<ExperimentalFlag, bool> defaultExperimentalFlags = {
  ExperimentalFlag.constantUpdate2018: false,
  ExperimentalFlag.controlFlowCollections: true,
  ExperimentalFlag.extensionMethods: false,
  ExperimentalFlag.nonNullable: false,
  ExperimentalFlag.setLiterals: true,
  ExperimentalFlag.spreadCollections: true,
  ExperimentalFlag.tripleShift: false,
};