Warn about overriding operator== but not hashCode.

dart/tests/compiler/dart2js/analyze_dart2js_test.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 analyze_api;
 
 import "package:expect/expect.dart";
 import '../../../sdk/lib/_internal/compiler/implementation/filenames.dart';
 import 'analyze_helper.dart';
 
 /**
  * Map of white-listed warnings and errors.
  *
  * Only add a white-listing together with a bug report to dartbug.com and add
  * the bug issue number as a comment on the white-listing.
  *
  * Use an identifiable suffix of the file uri as key. Use a fixed substring of
  * the error/warning message in the list of white-listings for each file.
  */
 // TODO(johnniwinther): Support canonical URIs as keys and message kinds as
 // values.
 const Map<String,List<String>> WHITE_LIST = const {
+  'sdk/lib/_internal/compiler/implementation/constants.dart':

[Johnni Winther, 2013/06/28 14:14:55]

Nice catch!

+      const [
+          'Hint: The class "PrimitiveConstant" overrides "operator==", '
+          'but not "get hashCode".',
+      ],
+  'sdk/lib/_internal/compiler/implementation/dart_types.dart':
+      const [
+          'Hint: The class "MalformedType" overrides "operator==", '
+          'but not "get hashCode".',
+          'Hint: The class "InterfaceType" overrides "operator==", '
+          'but not "get hashCode".',
+          'Hint: The class "TypedefType" overrides "operator==", '
+          'but not "get hashCode".',
+      ],
+
+  'sdk/lib/_internal/compiler/implementation/ssa/types.dart':
+      const [
+          'Hint: The class "HBoundedType" overrides "operator==", '
+          'but not "get hashCode".',
+      ],
+  'sdk/lib/_internal/compiler/implementation/ssa/value_range_analyzer.dart':
+      const [
+          'Hint: The class "IntValue" overrides "operator==", '
+          'but not "get hashCode".',
+          'Hint: The class "InstructionValue" overrides "operator==", '
+          'but not "get hashCode".',
+          'Hint: The class "AddValue" overrides "operator==", '
+          'but not "get hashCode".',
+          'Hint: The class "SubtractValue" overrides "operator==", '
+          'but not "get hashCode".',
+          'Hint: The class "NegateValue" overrides "operator==", '
+          'but not "get hashCode".',
+          'Hint: The class "Range" overrides "operator==", '
+          'but not "get hashCode".',
+      ],
+  'sdk/lib/_internal/compiler/implementation/tree/dartstring.dart':
+      const [
+          'Hint: The class "DartString" overrides "operator==", '
+          'but not "get hashCode".',
+      ],
+  'sdk/lib/_internal/compiler/implementation/types/container_type_mask.dart':
+      const [
+          'Hint: The class "ContainerTypeMask" overrides "operator==", '
+          'but not "get hashCode".',
+      ],
+  'sdk/lib/_internal/compiler/implementation/types/element_type_mask.dart':
+      const [
+          'Hint: The class "ElementTypeMask" overrides "operator==", '
+          'but not "get hashCode".',
+      ],
+  'sdk/lib/_internal/compiler/implementation/types/simple_types_inferrer.dart':
+      const [
+          'Hint: The class "ArgumentsTypes" overrides "operator==", '
+          'but not "get hashCode".',
+      ],
+  'sdk/lib/_internal/compiler/implementation/types/union_type_mask.dart':
+      const [
+          'Hint: The class "UnionTypeMask" overrides "operator==", '
+          'but not "get hashCode".',
+      ],
+  'sdk/lib/_internal/compiler/implementation/universe/side_effects.dart':
+      const [
+          'Hint: The class "SideEffects" overrides "operator==", '
+          'but not "get hashCode".',
+      ],
+  'sdk/lib/_internal/compiler/implementation/util/link.dart':
+      const [
+          'Hint: The class "Link" overrides "operator==", '
+          'but not "get hashCode".',
+      ],
+  'sdk/lib/_internal/compiler/implementation/util/link_implementation.dart':
+      const [
+          'Hint: The class "LinkEntry" overrides "operator==", '
+          'but not "get hashCode".',
+      ],
+  'sdk/lib/_internal/compiler/implementation/warnings.dart':
+      const [
+          'Hint: The class "Message" overrides "operator==", '
+          'but not "get hashCode".',
+      ],
 };
 
 void main() {
   var uri = currentDirectory.resolve(
       'sdk/lib/_internal/compiler/implementation/dart2js.dart');
   analyze([uri], WHITE_LIST);
 }