A language that can be statically parsed won't allow runtime redefinition of itself, like Lingua::Romana::Perligata. http://www.csse.monash.edu.au/~damian/paper

A language that can be statically parsed won't allow runtime redefinition of itself, like Lingua::Romana::Perligata. http://www.csse.monash.edu.au/~damian/papers/HTML/Perligata.html http://www.csse.monash.edu.au/~damian/papers/HTML/Perligata.... As Tom Duff said in the "Duff's Device" post, I'm not sure whether this makes an argument for or against this feature.