ES6: Desugaring of instanceof to support @@hasInstance

src/ast/ast-value-factory.cc

 // Copyright 2014 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 154 matching lines @@
   switch (type_) {
     case STRING:
       DCHECK(string_ != NULL);
       // Strings are already internalized.
       DCHECK(!string_->string().is_null());
       break;
     case SYMBOL:
       if (symbol_name_[0] == 'i') {
         DCHECK_EQ(0, strcmp(symbol_name_, "iterator_symbol"));
         value_ = isolate->factory()->iterator_symbol();
+      } else if (strcmp(symbol_name_, "hasInstance_symbol") == 0) {
+        value_ = isolate->factory()->has_instance_symbol();
       } else {
         DCHECK_EQ(0, strcmp(symbol_name_, "home_object_symbol"));
         value_ = isolate->factory()->home_object_symbol();
       }
       break;
     case NUMBER_WITH_DOT:
     case NUMBER:
       value_ = isolate->factory()->NewNumber(number_, TENURED);
       break;
     case SMI:
@@ skipping 217 matching lines @@
                                   length) == 0;
     } else {
       return CompareCharsUnsigned(reinterpret_cast<const uint16_t*>(l),
                                   reinterpret_cast<const uint16_t*>(r),
                                   length) == 0;
     }
   }
 }
 }  // namespace internal
 }  // namespace v8