You will have to explain this to me. From the original mention (article) it seems that they mean that compilers in general can be written in this way. Is that w

You will have to explain this to me. From the original mention (article) it seems that they mean that compilers in general can be written in this way. Is that what they mean? Or do they mean that compilers can be written in that way if they know something about the inputs that it will be fed?