public static bool InstanceOf(this EcmaValue thisValue, EcmaValue constructor)
{
if (constructor.Type != EcmaValueType.Object)
{
throw new EcmaTypeErrorException(InternalString.Error.NotFunction);
}
RuntimeObject obj = constructor.ToObject();
RuntimeObject instOfHandler = obj.GetMethod(Symbol.HasInstance);
if (instOfHandler != null)
{
return(instOfHandler.Call(constructor, thisValue).ToBoolean());
}
if (!constructor.IsCallable)
{
throw new EcmaTypeErrorException(InternalString.Error.NotFunction);
}
return(obj.HasInstance(thisValue.ToObject()));
}