Grammar railroad diagram #57
Description
Would be nice if copper could also generate an EBNF as understood by https://www.bottlecaps.de/rr/ui to generate railroad diagrams (https://en.wikipedia.org/wiki/Syntax_diagram).
I extended bison, byacc, lemon and btyacc to do so and can be seen here https://github.com/mingodad/lalr-parser-test , also CocoR here https://github.com/mingodad/CocoR-Java , unicc here https://github.com/mingodad/unicc , and peg/leg here https://github.com/mingodad/peg .
Would be nice to have it output a consolidated EBNF to have a full global view of the final grammar because indirect usage of copper, silver and ableC uses several pieces to compose the final grammar.