Generate ABNF/EBNF from Earley grammar

[seagreen]

Any idea how hard this would be to do? If Earley could generate EBNF then users could pass it to tools like GrammKit to make nice diagrams for their grammar.

[ollef]

Sounds quite doable if you're prepared to adapt your grammars a bit. As the library stands you could use <?> as a way to label what you cannot reify, e.g. to give a string description of your terminals or to give your rules names.