Reapply "Implement new model for class members." and "Implement new model for interface members."

sdk/lib/_internal/compiler/implementation/elements/names.dart

+// Copyright (c) 2014, 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.
+
+part of elements;
+
+/// A [Name] represents the abstraction of a Dart identifier which takes privacy
+/// and setter into account.
+// TODO(johnniwinther): Try to share logic with [Selector].
+abstract class Name {
+  /// Create a [Name] for an identifier [text]. If [text] begins with '_' a
+  /// private name with respect to [library] is created. If [isSetter] is `true`
+  /// the created name represents the setter name 'text='.
+  factory Name(String text, LibraryElement library, {bool isSetter: false}) {
+    if (isPrivateName(text)) {
+      return new PrivateName(text, library, isSetter: isSetter);
+    }
+    return new PublicName(text, isSetter: isSetter);
+  }
+
+  /// The text of the name without prefixed library name or suffixed '=' if
+  /// applicable.
+  String get text;
+
+  /// Is `true` if this name represents the name of a setter.
+  bool get isSetter;
+
+  /// Returns the getter name corresponding to this name. If this name is a
+  /// setter name 'v=' then the name 'v' is returned, otherwise the name itself
+  /// is returned.
+  Name get getter;
+
+  /// Returns the seeter name corresponding to this name. If this name is a
+  /// getter name 'v' then the name 'v=' is returned, otherwsie the name itself
+  /// is returned.
+  Name get setter;
+
+  /// Returned `true` an entity of this name is accessible from library
+  /// [element].
+  bool isAccessibleFrom(LibraryElement element);
+}
+
+class PublicName implements Name {
+  final String text;
+  final bool isSetter;
+
+  const PublicName(this.text, {this.isSetter: false});
+
+  Name get getter => isSetter ? new PublicName(text) : this;
+
+  Name get setter => isSetter ? this : new PublicName(text, isSetter: true);
+
+  bool isAccessibleFrom(LibraryElement element) => true;
+
+  int get hashCode => text.hashCode + 11 * isSetter.hashCode;
+
+  bool operator ==(other) {
+    if (other is! PublicName) return false;
+    return text == other.text && isSetter == other.isSetter;
+  }
+
+  String toString() => isSetter ? '$text=' : text;
+}
+
+class PrivateName extends PublicName {
+  final LibraryElement library;
+
+  PrivateName(String text, this.library, {bool isSetter: false})
+      : super(text, isSetter: isSetter);
+
+  Name get getter => isSetter ? new PrivateName(text, library) : this;
+
+  Name get setter {
+    return isSetter ? this : new PrivateName(text, library, isSetter: true);
+  }
+
+  bool isAccessibleFrom(LibraryElement element) => library == element;
+
+  int get hashCode => super.hashCode + 13 * library.hashCode;
+
+  bool operator ==(other) {
+    if (other is! PrivateName) return false;
+    return super==(other) && library == other.library;
+  }
+
+  String toString() => '${library.getLibraryName()}#${super.toString()}';
+}