This README would normally document whatever steps are necessary to get your application up and running.

• Python 3

This interpreter requires Python 3 to work. No attempts have been made to achieve backward compatibility with Python 2, nor is there any interest among authors and contributors.

You must install Python 3 before proceedings forward. Please see elsewhere for more information on installing Python 3.

• Python installation of ANTLR grammar https://github.com/antlr/antlr4/blob/master/doc/python-target.md

You must install ANTLR runtime for this interpreter to work. This can be done by using the pip3 command as follows

pip3 install antlr4-python3-runtime

You must have sufficient rights to install packages. Access control issues are beyond the scope of this document.

• How to run the interpreter?

Type the following on the command-line.

python3 interpreter.py input.txt

• How to regenerate the parser?

If you have made any grammar changes, it would be necessary to regenerate the lexer and parser related files. To do so, run the following commands.

cd src java -jar ../lib/antlr-4.7.1-complete.jar -Dlanguage=Python3 -no-listener ArithLang.g4

• How to regenerate and run the interpreter?

cd src java -jar ../lib/antlr-4.7.1-complete.jar -Dlanguage=Python3 -no-listener ArithLang.g python3 Interpreter.py input.txt

Where input.txt is the input program.