1 - [ ] Finalize support for error messages based upon: [A Parsing Machine for Parsing Expression Grammars with Labeled Failures](https://dl.acm.org/doi/10.1145/2851613.2851750)
3 - [ ] Support parsing tree inputs (eg. RelaxNG in `symantic-xml` or HTTP routing in `symantic-http-server`).
5 - [ ] Study how the generated parser can be made reentrant like `attoparsec`'s `Partial`.
6 In which case it would be able to replace `attoparsec` in `pipes`.
8 - [ ] Golden tests using more complex grammars.
10 - [ ] Some static infos should be attached to 'OnException'
11 to avoid comparing inputs when they're the same
12 and to improve 'checkedHorizon'.