Input an antlr grammar and file for python to test it out

Overview

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.

Support

This tools has support for both Windows and Unix based operative systems.

References

Author

  • Oscar Juárez
Owner
Oscar Juárez
Oscar Juárez
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