JS_SplicePrototype(JSContext* cx, HandleObject obj, HandleObject proto)
{
/*
* Change the prototype of an object which hasn't been used anywhere
* and does not share its type with another object. Unlike JS_SetPrototype,
* does not nuke type information for the object.
*/
CHECK_REQUEST(cx);
if (!obj->isSingleton()) {
/*
* We can see non-singleton objects when trying to splice prototypes
* due to mutable __proto__ (ugh).
*/
return JS_SetPrototype(cx, obj, proto);
}
Rooted<TaggedProto> tagged(cx, TaggedProto(proto));
return obj->splicePrototype(cx, obj->getClass(), tagged);
}
