Consider implementing recoverWhile=auto|custom key

[hurricup]

Grammar-Kit context help shows section "Followed by" with list of tokens and rules that can be after particular rule according to the grammar. You could use these tokens for auto-generating base recovery rule with possible custom tokens (rule), like:

// user puts
some_rule ::= ....  {recoverWhile=auto|custom_recovery_appendix}

// and parser using following rule (not generating it in bnf)
auto_generated_recover_rule ::= !(auto_calculated_tokens|custom_recovery_appendix)

or make a macro for it, like:

recovery_rule ::= !({AUTO_TOKENS}|..whatever user puts..)

and expand this macro on compilation phase.

Currently we can use context help to generate recovery sets, but each time grammar changes - all rules should be updated.

[hurricup]

seems 'followed by' tokens calculated incorrectly. Or in strange way.

[calexHG]

"seems 'followed by' tokens calculated incorrectly. Or in strange way."

How so? Do you have any examples of what you are expecting and what you are getting?

[JojOatXGME]

This comment suggests that you can already write recoverWhile="#auto". However, I haven't tested it, and maybe it is outdated.