Provide private symbols through internal APIs

include/v8.h

 // Copyright 2012 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 96 matching lines @@
 class ObjectTemplate;
 class Primitive;
 class RawOperationDescriptor;
 class Signature;
 class StackFrame;
 class StackTrace;
 class String;
 class StringObject;
 class Symbol;
 class SymbolObject;
+class Private;
 class Uint32;
 class Utils;
 class Value;
 template <class T> class Handle;
 template <class T> class Local;
 template <class T> class Eternal;
 template<class T> class NonCopyablePersistentTraits;
 template<class T,
          class M = NonCopyablePersistentTraits<T> > class Persistent;
 template<class T, class P> class WeakCallbackObject;
@@ skipping 1792 matching lines @@
 /**
  * A JavaScript symbol (ECMA-262 edition 6)
  *
  * This is an experimental feature. Use at your own risk.
  */
 class V8_EXPORT Symbol : public Primitive {
  public:
   // Returns the print name string of the symbol, or undefined if none.
   Local<Value> Name() const;
 
-  // Create a symbol without a print name.
-  static Local<Symbol> New(Isolate* isolate);
-
-  // Create a symbol with a print name.
-  static Local<Symbol> New(Isolate *isolate, const char* data, int length = -1);
+  // Create a symbol. If data is not NULL, it will be used as a print name.
+  static Local<Symbol> New(
+      Isolate *isolate, const char* data = NULL, int length = -1);
 
   V8_INLINE static Symbol* Cast(v8::Value* obj);
  private:
   Symbol();
   static void CheckCast(v8::Value* obj);
 };
 
 
 /**
+ * A private symbol
+ *
+ * This is an experimental feature. Use at your own risk.
+ */
+class V8_EXPORT Private : public Data {
+ public:
+  // Returns the print name string of the private symbol, or undefined if none.
+  Local<Value> Name() const;
+
+  // Create a private symbol. If data is not NULL, it will be the print name.
+  static Local<Private> New(
+      Isolate *isolate, const char* data = NULL, int length = -1);
+
+ private:
+  Private();
+};
+
+
+/**
  * A JavaScript number value (ECMA-262, 4.3.20)
  */
 class V8_EXPORT Number : public Primitive {
  public:
   double Value() const;
   static Local<Number> New(double value);
   static Local<Number> New(Isolate* isolate, double value);
   V8_INLINE static Number* Cast(v8::Value* obj);
  private:
   Number();
@@ skipping 149 matching lines @@
                    AccessControl settings = DEFAULT,
                    PropertyAttribute attribute = None);
 
   // This function is not yet stable and should not be used at this time.
   bool SetDeclaredAccessor(Local<String> name,
                            Local<DeclaredAccessorDescriptor> descriptor,
                            PropertyAttribute attribute = None,
                            AccessControl settings = DEFAULT);
 
   /**
+   * Functionality for private properties.
+   * This is an experimental feature, use at your own risk.
+   * Note: Private properties are inherited. Do not rely on this, since it may
+   * change.
+   */
+  bool HasPrivate(Handle<Private> key);
+  bool SetPrivate(Handle<Private> key, Handle<Value> value);
+  bool DeletePrivate(Handle<Private> key);
+  Local<Value> GetPrivate(Handle<Private> key);
+
+  /**
    * Returns an array containing the names of the enumerable properties
    * of this object, including properties from prototype objects.  The
    * array returned by this method contains the same values as would
    * be enumerated by a for-in statement over this object.
    */
   Local<Array> GetPropertyNames();
 
   /**
    * This function has the same functionality as GetPropertyNames but
    * the returned array doesn't contain the names of properties from
@@ skipping 4377 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_