Wrong python code generated about grammarinator HOT 3 CLOSED

Hi @bendrissou

Thanks for the report! The generated Python code is incorrect, since the input grammar is not correct either. Grammarinator follows the syntax of ANTLR where terminal rules must not refer to non-terminals. If you generate a parser from the grammar above with ANTLR then you get the following error message:

error(160): /work/dir/json.g4:11:29: reference to parser rule token in lexer rule NUMBER
warning(125): json.g4:8:5: implicit definition of token NUMBER in parser

If you transform token into a terminal rule (rename it to Token) then it will work as expected (both with Grammarinator and ANTLR).

You are right though, that it would be helpful to throw an error from grammarinator-process if the input grammar is not correct. I'll think about it how to handle all the possible input errors (w/o explicitly validating it with ANTLR).

from grammarinator.

@bendrissou Did you manage to fix the grammar? Can we close this issue?

from grammarinator.

Yes, I have fixed my grammar. I only wanted to report the bug. Found the bug with my fuzzer.

from grammarinator.