Add flags for proposed features

pkg/analyzer/lib/options.dart

 // Copyright (c) 2013, 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.
 
 library options;
 
 import 'dart:io';
 
 import 'package:args/args.dart';
 
 const _BINARY_NAME = 'dartanalyzer';
 
 /**
  * Analyzer commandline configuration options.
  */
 class CommandLineOptions {
-
-  /** Batch mode (for unit testing) */
-  final bool shouldBatch;
-
-  /** Whether to use machine format for error display */
-  final bool machineFormat;
-
-  /** Whether to display version information */
-  final bool displayVersion;
+  /** The path to the dart SDK */
+  final String dartSdkPath;
 
   /** A table mapping the names of defined variables to their values. */
   final Map<String, String> definedVariables;
 
   /** Whether to report hints */
   final bool disableHints;
 
+  /** Whether to display version information */
+  final bool displayVersion;
+
+  /** Whether to enable support for the proposed async feature. */
+  final bool enableAsync;
+
+  /** Whether to enable support for the proposed enum feature. */
+  final bool enableEnum;
+
   /** Whether to ignore unrecognized flags */
   final bool ignoreUnrecognizedFlags;
 
+  /** Whether to log additional analysis messages and exceptions */
+  final bool log;
+
+  /** Whether to use machine format for error display */
+  final bool machineFormat;
+
+  /** The path to the package root */
+  final String packageRootPath;
+
   /** Whether to show performance statistics */
   final bool perf;
 
+  /** Batch mode (for unit testing) */
+  final bool shouldBatch;
+
   /** Whether to show package: warnings */
   final bool showPackageWarnings;
 
   /** Whether to show SDK warnings */
   final bool showSdkWarnings;
 
+  /** The source files to analyze */
+  final List<String> sourceFiles;
+
   /** Whether to show both cold and hot performance statistics */
   final bool warmPerf;
 
   /** Whether to treat warnings as fatal */
   final bool warningsAreFatal;
 
-  /** The path to the dart SDK */
-  final String dartSdkPath;
-
-  /** The path to the package root */
-  final String packageRootPath;
-
-  /** The source files to analyze */
-  final List<String> sourceFiles;
-
-  /** Whether to log additional analysis messages and exceptions */
-  final bool log;
-
   /**
    * Initialize options from the given parsed [args].
    */
   CommandLineOptions._fromArgs(ArgResults args, Map<String, String> definedVariables)
-    : shouldBatch = args['batch'],
+    : dartSdkPath = args['dart-sdk'],
+      this.definedVariables = definedVariables,
+      disableHints = args['no-hints'],
+      displayVersion = args['version'],
+      enableAsync = args['enable-async'],
+      enableEnum = args['enable-enum'],
+      ignoreUnrecognizedFlags = args['ignore-unrecognized-flags'],
+      log = args['log'],
       machineFormat = args['machine'] || args['format'] == 'machine',
-      displayVersion = args['version'],
-      disableHints = args['no-hints'],
-      ignoreUnrecognizedFlags = args['ignore-unrecognized-flags'],
+      packageRootPath = args['package-root'],
       perf = args['perf'],
+      shouldBatch = args['batch'],
       showPackageWarnings = args['show-package-warnings'] || args['package-warnings'],
       showSdkWarnings = args['show-sdk-warnings'] || args['warnings'],
+      sourceFiles = args.rest,
       warmPerf = args['warm-perf'],
-      warningsAreFatal = args['fatal-warnings'],
-      dartSdkPath = args['dart-sdk'],
-      packageRootPath = args['package-root'],
-      log = args['log'],
-      sourceFiles = args.rest,
-      this.definedVariables = definedVariables;
+      warningsAreFatal = args['fatal-warnings'];
 
   /**
    * Parse [args] into [CommandLineOptions] describing the specified
    * analyzer options. In case of a format error, prints error and exists.
    */
   static CommandLineOptions parse(List<String> args) {
     CommandLineOptions options = _parse(args);
     // check SDK
     {
       var sdkPath = options.dartSdkPath;
@@ skipping 36 matching lines @@
           defaultsTo: false, negatable: false)
       ..addFlag('package-warnings',
           help: 'Show warnings from package: imports',
           defaultsTo: false, negatable: false)
       ..addFlag('show-package-warnings',
           help: 'Show warnings from package: imports (deprecated)',
           defaultsTo: false, negatable: false)
       ..addFlag('perf',
           help: 'Show performance statistics',
           defaultsTo: false, negatable: false)
-      ..addFlag('warm-perf',
-          help: 'Show both cold and warm performance statistics',
-          defaultsTo: false, negatable: false, hide: true)
       ..addFlag('warnings', help: 'Show warnings from SDK imports',
           defaultsTo: false, negatable: false)
       ..addFlag('show-sdk-warnings', help: 'Show warnings from SDK imports (deprecated)',
           defaultsTo: false, negatable: false)
       ..addFlag('help', abbr: 'h', help: 'Display this help message',
           defaultsTo: false, negatable: false)
+      //
+      // Hidden flags.
+      //
+      ..addFlag('enable-async',
+          help: 'Enable support for the proposed async feature',
+          defaultsTo: false, negatable: false, hide: true)
+      ..addFlag('enable-enum',
+          help: 'Enable support for the proposed enum feature',
+          defaultsTo: false, negatable: false, hide: true)
       ..addFlag('log', help: 'Log additional messages and exceptions',
-        defaultsTo: false, negatable: false, hide: true);
+          defaultsTo: false, negatable: false, hide: true)
+      ..addFlag('warm-perf',
+          help: 'Show both cold and warm performance statistics',
+          defaultsTo: false, negatable: false, hide: true);
 
     try {
       // TODO(scheglov) https://code.google.com/p/dart/issues/detail?id=11061
       args = args.map((String arg) => arg == '-batch' ? '--batch' : arg).toList();
       Map<String, String> definedVariables = <String, String>{};
       var results = parser.parse(args, definedVariables);
       // help requests
       if (results['help']) {
         _showUsage(parser);
         exit(0);
@@ skipping 155 matching lines @@
 
   _getNextFlagIndex(args, i) {
     for ( ; i < args.length; ++i) {
       if (args[i].startsWith('--')) {
         return i;
       }
     }
     return i;
   }
 }