Need something to make debugging a grammar easier #19

Regardless of whether the preceding issue is really a bug, it would help enormously to have something like yydebug in yacc or (debug filename) in br-parser-tools/yacc. If I could see the possible parses in progress as the parser consumes tokens, that would be plenty. Even just being able to look at the generated parsing table might help.

Regardless of whether the preceding issue is really a bug, it would help enormously to have something like `yydebug` in _yacc_ or `(debug filename)` in [`br-parser-tools/yacc`](https://docs.racket-lang.org/br-parser-tools/LALR_1__Parsers.html?q=debug). If I could see the possible parses in progress as the parser consumes tokens, that would be plenty. Even just being able to look at the generated parsing table might help.

brag is mostly just a front end to cfg-parser. AFAICT the debug option is not part of that parser.

`brag` is mostly just a front end to [`cfg-parser`](https://docs.racket-lang.org/br-parser-tools/Context-Free_Parsers.html?q=debug). AFAICT the `debug` option is not part of that parser.

“The cfg-parser form does not support the precs, suppress, debug, or yacc-output options of parser.”

“The `cfg-parser` form does not support the `precs`, `suppress`, `debug`, or `yacc-output` options of `parser`.”

Therefore this issue belongs in parser-tools. If it’s fixed there, I can propagate it to br-parser-tools.

Therefore this issue belongs in [`parser-tools`](https://github.com/racket/parser-tools). If it’s fixed there, I can propagate it to `br-parser-tools`.

Labels Milestones

Need something to make debugging a grammar easier #19