Strict mode delete.

src/objects.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1268 matching lines @@
   DISALLOW_IMPLICIT_CONSTRUCTORS(HeapNumber);
 };
 
 
 // The JSObject describes real heap allocated JavaScript objects with
 // properties.
 // Note that the map of JSObject changes during execution to enable inline
 // caching.
 class JSObject: public HeapObject {
  public:
-  enum DeleteMode { NORMAL_DELETION, FORCE_DELETION };
+  enum DeleteMode {
+    NORMAL_DELETION,
+    STRICT_DELETION,
+    FORCE_DELETION
+  };

[Martin Maly, 2011/02/14 05:15:22]

This enum felt like natural place to capture strict delete. I actually
originally built the code passing around additional parameter and then
consolidated back to this enum, making sure all code paths are handled.

+
   enum ElementsKind {
     // The only "fast" kind.
     FAST_ELEMENTS,
     // All the kinds below are "slow".
     DICTIONARY_ELEMENTS,
     PIXEL_ELEMENTS,
     EXTERNAL_BYTE_ELEMENTS,
     EXTERNAL_UNSIGNED_BYTE_ELEMENTS,
     EXTERNAL_SHORT_ELEMENTS,
     EXTERNAL_UNSIGNED_SHORT_ELEMENTS,
@@ skipping 5220 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_