Modify the Language Syntactically

Modify the syntax used by your cadaver by (1) adding a new operator and a new data type and (2) changing the procedure/function interface so that all procedures/functions must have at least two arguments.

• The purpose of the assignment is to get experience with syntax. Modify the syntax in place (i.e. modify the compiler) if that is feasible. However, if that is difficult for compilation or other engineering reasons, just extract the scanner and parser and modify them.
• Choose your own addition, since it's impossible to give one proposal for all the languages. You might wish to float your idea to the newsgroup. The goal is to make a nontrivial syntactic extension, whether or not it is good language design.
• Discuss what was involved in making the change. How easy or difficult is it to understand where the changes need to be? To insure that the resulting analyzer is correct? To debug the analyzer?