TDOP of Vaughan Pratt is also used in maxima (that is the way they use an infix language similar to python as a frontend to Lisp. In maxima you can define easil

TDOP of Vaughan Pratt is also used in maxima (that is the way they use an infix language similar to python as a frontend to Lisp. In maxima you can define easily infix, prefix and postfix operator with a left and right binding force for your grammar. I couldn't find with grep the file I was looking for in the maxima source, but for examen Fateman paper "Syntax Extension as a Tool for Application Programming" is a good reference.