Forgiving syntax

[Stehlampe2020]

Suggestion Provide a %catchall token_name syntax thingy that declares that everything that cannot be parsed as any defined token or terminal should be returned as the token token_name. This would allow for forgiving syntax definitions, that have a catchall that doesn't literally catch all characters but only everythin that would otherwise cause a syntax error.

Describe alternatives you've considered I've tried using catchall definitions like a /.+/s at lower priority than all other tokens but that just returned the whole source code I gave it in single characters as that catchall token, fully ignoring all valid defined tokens. Even if it wouldn't have caused a syntax error without the catchall it just singled out every character.

Additional context This could be useful for e.g. markup parsing. I'm creating my own markup language right now and having forgiving syntax that cannot error out, just return only-half-usable results would help a lot.