Add an imported into list for libraries so that it is possible to lookup

vm/raw_object.h

 // Copyright (c) 2011, 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.
 
 #ifndef VM_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "vm/assert.h"
 #include "vm/globals.h"
 #include "vm/snapshot.h"
@@ skipping 429 matching lines @@
 class RawLibrary : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(Library);
 
   RawObject** from() { return reinterpret_cast<RawObject**>(&ptr()->name_); }
   RawString* name_;
   RawString* url_;
   RawScript* script_;
   RawString* private_key_;
   RawArray* dictionary_;         // Top-level names in this library.
   RawArray* anonymous_classes_;  // Classes containing top-level elements.
-  RawArray* imports_;            // Imported libraries.
+  RawArray* imports_;            // List of imported libraries.
+  RawArray* imported_into_;      // List of libraries where this is imported.

[hausner, 2011/10/19 23:56:27]

It doesn't fit on one line, but I think it's worthwhile to point out that the
list contains the importers that import _without_ a prefix.

[siva, 2011/10/20 23:08:47]

Done.

   RawLibrary* next_registered_;  // Linked list of registered libraries.
   RawObject** to() {
     return reinterpret_cast<RawObject**>(&ptr()->next_registered_);
   }
 
   intptr_t num_imports_;         // Number of entries in imports_.
+  intptr_t num_imported_into_;   // Number of entries in imported_into_.
   intptr_t num_anonymous_;       // Number of entries in anonymous_classes_.
   Dart_NativeEntryResolver native_entry_resolver_;  // Resolves natives.
   bool corelib_imported_;
   bool loaded_;
 };
 
 
 class RawLibraryPrefix : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(LibraryPrefix);
 
@@ skipping 287 matching lines @@
   intptr_t type_;  // Uninitialized, simple or complex.
   intptr_t flags_;  // Represents global/local, case insensitive, multiline.
 
   // Variable length data follows here.
   uint8_t data_[0];
 };
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_