Error Suppression FTW.

pkg/analyzer/lib/src/task/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.src.task.options;
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/plugin/options.dart';
 import 'package:analyzer/source/analysis_options_provider.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/task/general.dart';
 import 'package:analyzer/task/general.dart';
 import 'package:analyzer/task/model.dart';
 import 'package:source_span/source_span.dart';
 import 'package:yaml/yaml.dart';
 
 /// The errors produced while parsing `.analysis_options` files.
 ///
 /// The list will be empty if there were no errors, but will not be `null`.
 final ListResultDescriptor<AnalysisError> ANALYSIS_OPTIONS_ERRORS =
     new ListResultDescriptor<AnalysisError>(
         'ANALYSIS_OPTIONS_ERRORS', AnalysisError.NO_ERRORS);
 
+/// `analyzer` analysis options constants.
+class AnalyzerOptions {
+  static const String errors = 'errors';
+  static const String exclude = 'exclude';
+  static const String plugins = 'plugins';
+  static const String strong_mode = 'strong-mode';
+
+  /// Supported top-level `analyzer` options.
+  static const List<String> top_level = const [
+    errors,
+    exclude,
+    plugins,
+    strong_mode
+  ];
+}
+
 /// Validates `analyzer` top-level options.
 class AnalyzerOptionsValidator extends TopLevelOptionValidator {
-  AnalyzerOptionsValidator()
-      : super('analyzer', const ['exclude', 'plugins', 'strong-mode']);
+  AnalyzerOptionsValidator() : super('analyzer', AnalyzerOptions.top_level);
 }
 
 /// Convenience class for composing validators.
 class CompositeValidator extends OptionsValidator {
   final List<OptionsValidator> validators;
   CompositeValidator(this.validators);
 
   @override
   void validate(ErrorReporter reporter, Map<String, YamlNode> options) =>
       validators.forEach((v) => v.validate(reporter, options));
@@ skipping 112 matching lines @@
                 AnalysisOptionsWarningCode.UNSUPPORTED_OPTION,
                 k.span,
                 [pluginName, k.value]);
           }
         }
         //TODO(pq): consider an error if the node is not a Scalar.
       });
     }
   }
 }