Add interceptor support for symbols

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 6572f26d177a18a41887d4348d69246c74d56612..2d31aef8e7405421d84868cdaec977a50d2c2ee8 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -3319,6 +3319,55 @@ typedef void (*NamedPropertyEnumeratorCallback)(
     const PropertyCallbackInfo<Array>& info);
 
 
+// TODO(wingo): Deprecate and remove previous typedefs, and replace
+// GenericNamedPropertyFooCallback with just NamedPropertyFooCallback.
+/**
+ * GenericNamedProperty[Getter|Setter] are used as interceptors on object.
+ * See ObjectTemplate::SetNamedPropertyHandler.
+ */
+typedef void (*GenericNamedPropertyGetterCallback)(
+    Local<Name> property,
+    const PropertyCallbackInfo<Value>& info);
+
+
+/**
+ * Returns the value if the setter intercepts the request.
+ * Otherwise, returns an empty handle.
+ */
+typedef void (*GenericNamedPropertySetterCallback)(
+    Local<Name> property,
+    Local<Value> value,
+    const PropertyCallbackInfo<Value>& info);
+
+
+/**
+ * Returns a non-empty handle if the interceptor intercepts the request.
+ * The result is an integer encoding property attributes (like v8::None,
+ * v8::DontEnum, etc.)
+ */
+typedef void (*GenericNamedPropertyQueryCallback)(
+    Local<Name> property,
+    const PropertyCallbackInfo<Integer>& info);
+
+
+/**
+ * Returns a non-empty handle if the deleter intercepts the request.
+ * The return value is true if the property could be deleted and false
+ * otherwise.
+ */
+typedef void (*GenericNamedPropertyDeleterCallback)(
+    Local<Name> property,
+    const PropertyCallbackInfo<Boolean>& info);
+
+
+/**
+ * Returns an array containing the names of the properties the named
+ * property getter intercepts.
+ */
+typedef void (*GenericNamedPropertyEnumeratorCallback)(
+    const PropertyCallbackInfo<Array>& info);
+
+
 /**
  * Returns the value of the property if the getter intercepts the
  * request.  Otherwise, returns an empty handle.
@@ -3640,6 +3689,9 @@ class V8_EXPORT ObjectTemplate : public Template {
    * from this object template, the provided callback is invoked instead of
    * accessing the property directly on the JavaScript object.
    *
+   * Note that new code should use the second version that can intercept
+   * symbol-named properties as well as string-named properties.
+   *
    * \param getter The callback to invoke when getting a property.
    * \param setter The callback to invoke when setting a property.
    * \param query The callback to invoke to check if a property is present,
@@ -3657,6 +3709,13 @@ class V8_EXPORT ObjectTemplate : public Template {
       NamedPropertyDeleterCallback deleter = 0,
       NamedPropertyEnumeratorCallback enumerator = 0,
       Handle<Value> data = Handle<Value>());
+  void SetNamedPropertyHandler(
+      GenericNamedPropertyGetterCallback getter,
+      GenericNamedPropertySetterCallback setter = 0,
+      GenericNamedPropertyQueryCallback query = 0,
+      GenericNamedPropertyDeleterCallback deleter = 0,
+      GenericNamedPropertyEnumeratorCallback enumerator = 0,
+      Handle<Value> data = Handle<Value>());
 
   /**
    * Sets an indexed property handler on the object template.