3.0.0

New features

• Deterministic repetition syntax: <foo>{1,5} (up to five of <foo>), "bar"{10} (exactly ten of bar).
• Tail-recursive implementation, no more depth limit.
• [CLI] New debugging option: --dump-stack (displays the current symbol stack at every step).
• [CLI] Improved and more details --debug output.
• [CLI] New --max-nonproductive-reductions <int> option to limit reductions that don't produce any terminals and prevent useless loops.

Internal modules are also available as an OCaml library now, see src/lib/bnfgen.mli.

Breaking changes

• [CLI] The --max-depth option was removed since there's no real "depth" anymore. You can use --max-reductions instead to limit the total number of symbol reductions performed if you want to prevent looping rules and/or infinitely large outputs.