Add GetPropertyAttribute method for Object in the API

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 08724110674568d2dd7bb0919d85556c4b0f6353..35e54149e0892a0d6df5b3a7d460c65652523c81 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -1435,6 +1435,15 @@ class Object : public Value {
 
   V8EXPORT Local<Value> Get(uint32_t index);
 
+  /**
+   * Gets the property attributes of a property.
+   * Can be None or any combination of ReadOnly, DontEnum and DontDelete.
+   *
+   * Note: Throws a ReferenceError exception and returns None when the property

[Mads Ager (chromium), 2011/07/15 07:25:51]

I'm not sure I like the idea of throwing a ReferenceError exception here.
Normally reference errors are only thrown when loading a non-existing global
property. Throwing one here because someone attempted to get property attributes
of some non-existing property will be confusing.

I think I would prefer to never throw an exception here. The user would then
have to either know that the property is there or use Has before using
GetPropertyAttributes.

+   *       doesn't exist.
+   */
+  V8EXPORT PropertyAttribute GetPropertyAttribute(Handle<Value> key);

[Mads Ager (chromium), 2011/07/15 07:25:51]

GetPropertyAttribute -> GetPropertyAttributes

+
   // TODO(1245389): Replace the type-specific versions of these
   // functions with generic ones that accept a Handle<Value> key.
   V8EXPORT bool Has(Handle<String> key);