Introduce LibraryEntity

pkg/compiler/lib/src/typechecker.dart

 // Copyright (c) 2012, 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.typechecker;
 
 import 'common/names.dart' show Identifiers;
 import 'common/resolution.dart' show Resolution;
 import 'common/tasks.dart' show CompilerTask;
 import 'common.dart';
@@ skipping 790 matching lines @@
     // We didn't find a member with the correct name.  If this lookup is for a
     // super or redirecting initializer, the resolver has already emitted an
     // error message.  If the target is a proxy, no warning needs to be emitted.
     // Otherwise, try to emit the most precise warning.
     if (!interface.element.isProxy && !analyzingInitializer) {
       bool foundPrivateMember = false;
       if (memberName.isPrivate) {
         void findPrivateMember(MemberSignature member) {
           if (memberName.isSimilarTo(member.name)) {
             PrivateName privateName = member.name;
+            LibraryElement library = privateName.library;
             reportMessage(
                 node,
                 MessageKind.PRIVATE_ACCESS,
                 {
                   'name': name,
-                  'libraryName': privateName.library.libraryOrScriptName
+                  'libraryName': library.libraryOrScriptName
                 },
                 isHint: isHint);
             foundPrivateMember = true;
           }
         }
 
         // TODO(johnniwinther): Avoid computation of all class members.
         MembersCreator.computeAllClassMembers(resolution, interface.element);
         if (lookupClassMember) {
           interface.element.forEachClassMember(findPrivateMember);
@@ skipping 1222 matching lines @@
 
   visitTypedef(Typedef node) {
     // Do not typecheck [Typedef] nodes.
   }
 
   visitNode(Node node) {
     reporter.internalError(node,
         'Unexpected node ${node.getObjectDescription()} in the type checker.');
   }
 }