V8 support for cached accessors.

include/v8.h

 // 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.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 4619 matching lines @@
  */
 class V8_EXPORT Template : public Data {
  public:
   /**
    * Adds a property to each instance created by this template.
    *
    * The property must be defined either as a primitive value, or a template.
    */
   void Set(Local<Name> name, Local<Data> value,
            PropertyAttribute attributes = None);
+  void SetPrivate(Local<Private> name, Local<Data> value,
+                  PropertyAttribute attributes = None);
   V8_INLINE void Set(Isolate* isolate, const char* name, Local<Data> value);
 
   void SetAccessorProperty(
      Local<Name> name,
      Local<FunctionTemplate> getter = Local<FunctionTemplate>(),
      Local<FunctionTemplate> setter = Local<FunctionTemplate>(),
      PropertyAttribute attribute = None,
      AccessControl settings = DEFAULT);
 
   /**
@@ skipping 452 matching lines @@
   /**
    * Creates a function template with a fast handler. If a fast handler is set,
    * the callback cannot be null.
    */
   static Local<FunctionTemplate> NewWithFastHandler(
       Isolate* isolate, FunctionCallback callback,
       experimental::FastAccessorBuilder* fast_handler = nullptr,
       Local<Value> data = Local<Value>(),
       Local<Signature> signature = Local<Signature>(), int length = 0);
 
+  /**
+   * Creates a function template backed/cached by a private property.
+   */
+  static Local<FunctionTemplate> NewWithCache(
+      Isolate* isolate, FunctionCallback callback,
+      Local<Private> cache_property, Local<Value> data = Local<Value>(),
+      Local<Signature> signature = Local<Signature>(), int length = 0);
+
   /** Returns the unique function instance in the current execution context.*/
   V8_DEPRECATE_SOON("Use maybe version", Local<Function> GetFunction());
   V8_WARN_UNUSED_RESULT MaybeLocal<Function> GetFunction(
       Local<Context> context);
 
   /**
    * Similar to Context::NewRemoteContext, this creates an instance that
    * isn't backed by an actual object.
    *
    * The InstanceTemplate of this FunctionTemplate must have access checks with
@@ skipping 4543 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // INCLUDE_V8_H_