rrcp-generate.md

RRCP with ANTLR

To test the ANTLR grammar with Python, you'll need to follow several steps to set up your environment, generate the parser and lexer, and then write a Python script to test the grammar. Below are the detailed steps to accomplish this:

Step 1: Install ANTLR

Download ANTLR:

Download the ANTLR jar file from the ANTLR website.

wget https://www.antlr.org/download/antlr-4.13.2-complete.jar

Set Up ANTLR in Your Environment:

You can place the ANTLR jar file in a directory of your choice. For example, let's say you place it in ~/antlr/antlr-4.13.0-complete.jar.

Set Up Environment Variables (Optional but recommended)!

You can set an environment variable for ANTLR. Add the following lines to your ~/.bashrc or ~/.bash_profile (or equivalent for your shell):

export ANTLR_HOME=~/antlr
export CLASSPATH="$ANTLR_HOME/antlr-4.13.0-complete.jar:$CLASSPATH"
alias antlr4='java -jar $ANTLR_HOME/antlr-4.13.0-complete.jar'
alias grun='java org.antlr.v4.gui.TestRig'

Reload your shell:

source ~/.bashrc  # or source ~/.bash_profile

Step 2: Install Python and Required Libraries

Install Python.

Make sure you have Python 3 installed. You can check by running:

python3 --version

Install ANTLR4 Python Runtime.

Use pip to install the ANTLR4 runtime for Python:

pip install antlr4-python3-runtime

Step 3: Generate Lexer and Parser

Create a File for Your Grammar.

Save your ANTLR grammar in a file named rrcp.g4.

Generate the Lexer and Parser.

Run the following command in the terminal to generate the lexer and parser:

antlr4 rrcp.g4 -Dlanguage=Python3

This will generate several Python files in the same directory, including rrcpLexer.py, rrcpParser.py, and others.

Step 4: Write a Test Script

see rrcp.py

and GNUmakefile