Support serialization of the compiler backbone.

pkg/compiler/lib/src/serialization/keys.dart

Index: pkg/compiler/lib/src/serialization/keys.dart
diff --git a/pkg/compiler/lib/src/serialization/keys.dart b/pkg/compiler/lib/src/serialization/keys.dart
new file mode 100644
index 0000000000000000000000000000000000000000..a3c276e84b8dd3bc5bb9a348dde723509b37e79b
--- /dev/null
+++ b/pkg/compiler/lib/src/serialization/keys.dart
@@ -0,0 +1,80 @@
+// 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 dart2js.serialization.keys;
+
+/// Keys used for serialization.
+class Key {
+  static const Key ALIAS = const Key('alias');
+  static const Key ARGUMENTS = const Key('arguments');
+  static const Key BOUND = const Key('bound');
+  static const Key CALL_STRUCTURE = const Key('callStructure');
+  static const Key CANONICAL_URI = const Key('canonicalUri');
+  static const Key CLASS = const Key('class');
+  static const Key COMPILATION_UNIT = const Key('compilation-unit');
+  static const Key COMPILATION_UNITS = const Key('compilation-units');
+  static const Key CONDITION = const Key('condition');
+  static const Key CONSTANT = const Key('constant');
+  static const Key CONSTANTS = const Key('constants');
+  static const Key CONSTRUCTOR = const Key('constructor');
+  static const Key DEFAULT = const Key('default');
+  static const Key DEFAULTS = const Key('defaults');
+  static const Key ELEMENT = const Key('element');
+  static const Key ELEMENTS = const Key('elements');
+  static const Key EXPORTS = const Key('exports');
+  static const Key EXPRESSION = const Key('expression');
+  static const Key FALSE = const Key('false');
+  static const Key FIELD = const Key('field');
+  static const Key FIELDS = const Key('fields');
+  static const Key FUNCTION = const Key('function');
+  static const Key ID = const Key('id');
+  static const Key IMPORTS = const Key('imports');
+  static const Key INTERFACES = const Key('interfaces');
+  static const Key INDEX = const Key('index');
+  static const Key IS_ABSTRACT = const Key('isAbstract');
+  static const Key IS_CONST = const Key('isConst');
+  static const Key IS_EXTERNAL = const Key('isExternal');
+  static const Key IS_FINAL = const Key('isFinal');
+  static const Key IS_NAMED = const Key('isNamed');
+  static const Key IS_OPERATOR = const Key('isOperator');
+  static const Key IS_OPTIONAL = const Key('isOptional');
+  static const Key KEYS = const Key('keys');
+  static const Key KIND = const Key('kind');
+  static const Key LEFT = const Key('left');
+  static const Key LENGTH = const Key('length');
+  static const Key LIBRARY = const Key('library');
+  static const Key LIBRARY_NAME = const Key('library-name');
+  static const Key MEMBERS = const Key('members');
+  static const Key NAME = const Key('name');
+  static const Key NAMES = const Key('names');
+  static const Key NAMED_PARAMETERS = const Key('named-parameters');
+  static const Key NAMED_PARAMETER_TYPES = const Key('named-parameter-types');
+  static const Key OFFSET = const Key('offset');
+  static const Key OFFSETS = const Key('offsets');
+  static const Key OPERATOR = const Key('operator');
+  static const Key OPTIONAL_PARAMETER_TYPES =
+      const Key('optional-parameter-types');
+  static const Key PARAMETERS = const Key('parameters');
+  static const Key PARAMETER_TYPES = const Key('parameter-types');
+  static const Key RETURN_TYPE = const Key('return-type');
+  static const Key RIGHT = const Key('right');
+  static const Key SUPERTYPE = const Key('supertype');
+  static const Key SUPERTYPES = const Key('supertypes');
+  static const Key TAGS = const Key('tags');
+  static const Key TRUE = const Key('true');
+  static const Key TYPE = const Key('type');
+  static const Key TYPES = const Key('types');
+  static const Key TYPE_ARGUMENTS = const Key('type-arguments');
+  static const Key TYPE_DECLARATION = const Key('type-declaration');
+  static const Key TYPE_VARIABLES = const Key('type-variables');
+  static const Key URI = const Key('uri');
+  static const Key VALUE = const Key('value');
+  static const Key VALUES = const Key('values');
+
+  final String name;
+
+  const Key(this.name);
+
+  String toString() => name;
+}