ES6: Implement WeakSet

src/types.cc

 // Copyright 2013 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 162 matching lines @@
       case JS_MODULE_TYPE:
       case JS_GLOBAL_OBJECT_TYPE:
       case JS_BUILTINS_OBJECT_TYPE:
       case JS_GLOBAL_PROXY_TYPE:
       case JS_ARRAY_BUFFER_TYPE:
       case JS_TYPED_ARRAY_TYPE:
       case JS_DATA_VIEW_TYPE:
       case JS_SET_TYPE:
       case JS_MAP_TYPE:
       case JS_WEAK_MAP_TYPE:
+      case JS_WEAK_SET_TYPE:
         if (map->is_undetectable()) return kUndetectable;
         return kOtherObject;
       case JS_ARRAY_TYPE:
         return kArray;
       case JS_FUNCTION_TYPE:
         return kFunction;
       case JS_REGEXP_TYPE:
         return kRegExp;
       case JS_PROXY_TYPE:
       case JS_FUNCTION_PROXY_TYPE:
@@ skipping 333 matching lines @@
       if (i > 0) PrintF(out, ",");
       type_i->TypePrint(out);
     }
     PrintF(out, "}");
   }
 }
 #endif
 
 
 } }  // namespace v8::internal