- Add handling of private dart:_ libraries.

vm/parser.cc

 // 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.
 
 #include "vm/parser.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/compiler_stats.h"
@@ skipping 4237 matching lines @@
     // library we create an empty library to import.
     library = Library::LookupLibrary(canon_url);
     if (library.IsNull()) {
       library = Library::New(canon_url);
       library.Register();
     }
   }
   const Namespace& ns =
     Namespace::Handle(Namespace::New(library, show_names, hide_names));
   if (is_import) {
+    // Ensure that private dart:_ libraries are only imported into dart:
+    // libraries.
+    const String& lib_url = String::Handle(library_.url());
+    if (canon_url.StartsWith(Symbols::DartSchemePrivate()) &&
+        !lib_url.StartsWith(Symbols::DartScheme())) {
+      ErrorMsg(import_pos, "private library is not accessible");
+    }
     if (prefix.IsNull() || (prefix.Length() == 0)) {
       library_.AddImport(ns);
     } else {
       LibraryPrefix& library_prefix = LibraryPrefix::Handle();
       library_prefix = library_.LookupLocalLibraryPrefix(prefix);
       if (!library_prefix.IsNull()) {
         library_prefix.AddImport(ns);
       } else {
         library_prefix = LibraryPrefix::New(prefix, ns);
         library_.AddObject(library_prefix, prefix);
@@ skipping 5484 matching lines @@
 void Parser::SkipQualIdent() {
   ASSERT(IsIdentifier());
   ConsumeToken();
   if (CurrentToken() == Token::kPERIOD) {
     ConsumeToken();  // Consume the kPERIOD token.
     ExpectIdentifier("identifier expected after '.'");
   }
 }
 
 }  // namespace dart