Visitor pattern

Good morning,

I'm a student of informatics, I understand French but I cannot use it well, this is why I'm writting in English, So I'm sorry for that.

We start by converting a language grammar using the BNFC tool, then we get a visitor pattern (a java file), named VisitSkel.java which I need to transforme it or to use it as a basis to built a compiler specific to the used grammar.

So my problem is I don't know how ?

Please help me;

Thank you very much

Best regards.
Sar
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