[antlr-interest] What exactly does 'follow set' mean?

[Ric Klaren]

shmuel siegel wrote:
> I assume that you mean codeGenBitsetTestThreshold as that is actually
> accepted. It only solves one of my problems; it makes the normal parsing
> readable. But it doesn't let me know what consume is doing during error
> recovery. I would still like an option for expanding the bitset into
> readable entities. Inline comments would be fine.

Turn on C++ mode for one run. C++ mode dumps the follow set contents in 
comments. Antlr's default error recovery does a consumeUntil the first 
token in the follow set (with defaultErrorHandler = true)

You can customize the error handling per rule. Doing inserts like you 
ask in a previous post is tricky though (it depends on the presence of 
syntactic predicates in you grammar wether this is doable or not).

Cheers,

Ric