Access grammar metadata?

[Chang Liu]

Hello,

 

While I am using ANTLR to define a grammar with say grammar.g file, is it possible to access its metadata such as how many prodution rules are there, what are the choices for a production rule, etc.? I browsed ANTLR API doc, did not find anything quite relevant to this with my bare eyes.

 

Any tips on this would be highly appreciated.

 

Thanks,

Chang

[Terence Parr]

Try Grammar (v4) object in tools part of software.

Ter

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Dictation in use. Please excuse homophones, malapropisms, and nonsense. 

[Chang Liu]

Thanks for the advice!

 

I did some more study on ANTLR 4 Documentation. Seems like the notion of ATN is relevant to this requirement. Is this the right direction for me?

[Terence Parr]

The grammar should answer questions about rules and then rules have ATN submachines with list of alts known to the Rule object. yep :)
Ter