CLI support for `enableAssertInitializer`s.

pkg/analyzer_cli/lib/src/options.dart

 // Copyright (c) 2015, 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 analyzer_cli.src.options;
 
 import 'dart:io';
 
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/src/command_line/arguments.dart';
@@ skipping 18 matching lines @@
 
 /// Exit handler.
 ///
 /// *Visible for testing.*
 typedef void ExitHandler(int code);
 
 /// Analyzer commandline configuration options.
 class CommandLineOptions {
   final bool enableNewAnalysisDriver = true;
 
+  /// Return `true` if the parser is to parse asserts in the initializer list of
+  /// a constructor.
+  final bool enableAssertInitializer;
+
   /// The path to output analysis results when in build mode.
   final String buildAnalysisOutput;
 
   /// Whether to use build mode.
   final bool buildMode;
 
   /// Whether to use build mode as a Bazel persistent worker.
   final bool buildModePersistentWorker;
 
   /// List of summary file paths to use in build mode.
@@ skipping 114 matching lines @@
         buildSummaryOutput = args['build-summary-output'],
         buildSummaryOutputSemantic = args['build-summary-output-semantic'],
         buildSuppressExitCode = args['build-suppress-exit-code'],
         contextBuilderOptions = createContextBuilderOptions(args),
         dartSdkPath = args['dart-sdk'],
         dartSdkSummaryPath = args['dart-sdk-summary'],
         disableCacheFlushing = args['disable-cache-flushing'],
         disableHints = args['no-hints'],
         displayVersion = args['version'],
         enableTypeChecks = args['enable_type_checks'],
+        enableAssertInitializer = args['enable-assert-initializers'],
         hintsAreFatal = args['fatal-hints'],
         ignoreUnrecognizedFlags = args['ignore-unrecognized-flags'],
         lints = args[lintsFlag],
         log = args['log'],
         machineFormat = args['format'] == 'machine',
         perfReport = args['x-perf-report'],
         shouldBatch = args['batch'],
         showPackageWarnings = args['show-package-warnings'] ||
             args['package-warnings'] ||
             args['x-package-warnings-prefix'] != null,
@@ skipping 278 matching lines @@
       ..addFlag('log',
           help: 'Log additional messages and exceptions.',
           defaultsTo: false,
           negatable: false,
           hide: hide)
       ..addFlag('enable_type_checks',
           help: 'Check types in constant evaluation.',
           defaultsTo: false,
           negatable: false,
           hide: hide)
+      ..addFlag('enable-assert-initializers',
+          help: 'Enable parsing of asserts in constructor initializers.',
+          defaultsTo: false,
+          negatable: false,
+          hide: hide)
       ..addFlag('use-analysis-driver-memory-byte-store',
           help: 'Use memory byte store, not the file system cache.',
           defaultsTo: false,
           negatable: false,
           hide: hide)
       ..addOption('url-mapping',
           help: '--url-mapping=libraryUri,/path/to/library.dart directs the '
               'analyzer to use "library.dart" as the source for an import '
               'of "libraryUri".',
           allowMultiple: true,
@@ skipping 68 matching lines @@
         'Usage: $_binaryName [options...] <directory or list of files>');
     errorSink.writeln('');
     errorSink.writeln(parser.usage);
     errorSink.writeln('');
     errorSink.writeln('''
 Run "dartanalyzer -h -v" for verbose help output, including less commonly used options.
 For more information, see http://www.dartlang.org/tools/analyzer.
 ''');
   }
 }