Indentation instead of brackets for Antlr4

Question

I'm currently attending the course "Compilers Construction" and I'm developing a simplified Java grammar in Antlr 4. The part involving Java grammar works just fine, except that it is slightly different from the original Java.

I'm told I should no use brackets and instead use indentation. I have tried a few examples from the internet, only examples for Antlr 3 which won't work in Antlr 4.

Can anyone help me with this indentation issue, or provide me the Python grammar for Antlr 4?

Answer 1

What about official GitHub ANTLR4 grammar repository? You can find many common language grammars. There is even a python3 directory containing Python3.g4.

This should help you out.