antlr4_python_parse_tree_listener_boilerplate.py

1import sys
2from antlr4 import *
3from MyGrammarLexer import MyGrammarLexer
4from MyGrammarParser import MyGrammarParser
5from MyGrammarListener import MyGrammarListener
6
7class MyListener(MyGrammarListener):
8    def enterEveryRule(self, ctx):
9        print(f"Rule entered: {ctx.getText()}")
10
11def main(argv):
12    input_stream = FileStream(argv[1])
13    lexer = MyGrammarLexer(input_stream)
14    stream = CommonTokenStream(lexer)
15    parser = MyGrammarParser(stream)
16    tree = parser.prog() # Replace 'prog' with your grammar's entry point
17
18    printer = MyListener()
19    walker = ParseTreeWalker()
20    walker.walk(printer, tree)
21
22if __name__ == '__main__':
23    main(sys.argv)