Message oriented programming - The case for first class messages

The first class status of message oriented programing (MoP) in the languages as metaclass is discussed. It is found that explicit metaclass called message, and definition and evaluation of messages is needed to support MoP. The compile time MoP have the capacity to tailor specific call site, that allows the programmer to talk to the compiler intimately. It is concluded that meta modeling is useful for understanding advanced computational concepts in languages, using computational reflection