[api] Prototype WeakRef implementation

src/objects-printer.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/objects.h"
 
 #include <iomanip>
 #include <memory>
 
 #include "src/bootstrapper.h"
@@ skipping 189 matching lines @@
       break;
     case JS_MAP_ITERATOR_TYPE:
       JSMapIterator::cast(this)->JSMapIteratorPrint(os);
       break;
     case JS_WEAK_MAP_TYPE:
       JSWeakMap::cast(this)->JSWeakMapPrint(os);
       break;
     case JS_WEAK_SET_TYPE:
       JSWeakSet::cast(this)->JSWeakSetPrint(os);
       break;
+    case JS_WEAK_REF_TYPE:
+      JSWeakRef::cast(this)->JSWeakRefPrint(os);
+      break;
     case JS_MODULE_NAMESPACE_TYPE:
       JSModuleNamespace::cast(this)->JSModuleNamespacePrint(os);
       break;
     case FOREIGN_TYPE:
       Foreign::cast(this)->ForeignPrint(os);
       break;
     case SHARED_FUNCTION_INFO_TYPE:
       SharedFunctionInfo::cast(this)->SharedFunctionInfoPrint(os);
       break;
     case JS_MESSAGE_OBJECT_TYPE:
@@ skipping 720 matching lines @@
 }
 
 
 void JSWeakSet::JSWeakSetPrint(std::ostream& os) {  // NOLINT
   JSObjectPrintHeader(os, this, "JSWeakSet");
   os << "\n - table = " << Brief(table());
   JSObjectPrintBody(os, this);
 }
 
 
+void JSWeakRef::JSWeakRefPrint(std::ostream& os) {  // NOLINT
+  JSObjectPrintHeader(os, this, "JSWeakRef");
+  os << "\n - table = " << Brief(table());
+  JSObjectPrintBody(os, this);
+}
+
+
 void JSArrayBuffer::JSArrayBufferPrint(std::ostream& os) {  // NOLINT
   JSObjectPrintHeader(os, this, "JSArrayBuffer");
   os << "\n - backing_store = " << backing_store();
   os << "\n - byte_length = " << Brief(byte_length());
   if (was_neutered()) os << "\n - neutered";
   JSObjectPrintBody(os, this, !was_neutered());
 }
 
 
 void JSTypedArray::JSTypedArrayPrint(std::ostream& os) {  // NOLINT
@@ skipping 772 matching lines @@
     printf("Not a transition array\n");
   } else {
     reinterpret_cast<i::TransitionArray*>(object)->Print();
   }
 }
 
 extern void _v8_internal_Print_StackTrace() {
   i::Isolate* isolate = i::Isolate::Current();
   isolate->PrintStack(stdout);
 }