py-antlr-input
Input an ANTLR grammar and test file for python to render a parser tree of the file. This program will make use of the grun command that comes with ANTLR.
Requirements
- python 3.5 or higher
- tkinter (python library)
- java
- ANTLR (with antlr4 and grun commands configured)
Usage
With your terminal, go to the repo directory and run:
python ./main.py
from there, the program should guide you. Take into account that you'll need:
- The name of the grammar
- An ANTLR4 grammar file (.g4)
- The name of the start rule
- A test file for your output language
You may also use the default Decaf grammar file specified in Decaf/Decaf.g4 by adding Decaf as an argument
python ./main.py Decaf
This will make the program only ask for the .decaf file you want to see the parser tree of.
Examples
Cow.decaf
This file has a lot of defined rules covered. Here's the parse tree for the code:
test.decaf
Just a regular test file. Useful when testing the grammar for the first time. Here's the code
Error handling
If there's just a small amount of errors, then the program will still render the parse tree with a bit of red highlighted where the code wasn't correcty specified. Make sure to check the terminal output for more details.
