While you can implement message passing on top of any language, as you said, I was talking about doing message passing under Smalltalk-80. There are non messag

While you can implement message passing on top of any language, as you said, I was talking about doing message passing under Smalltalk-80. There are non messaging parts in Smalltalk-80, like assignment. The Self variant of Smalltalk goes quite a bit further in using message passing for everything.