Question

Using javacc can I push some new characters in front of the inputstream ?

for example let’s say that my parser parses the following syntax:

#define Paragraphs  "Paragraph+"
#define Volume "(Title,(Chapter,${Paragraphs})+)"

Book=${Volume}+;

How can I tell javacc that its scanner should preprocess ${Volume} to (Title,(Chapter,Paragraph+)+) before invoking the parser ?

Can It be achieved using the MORE statement ?

Thanks

Answer 1

OK, I think I’ve found the solution: Some java statements can be added in the TOKEN section and the current buffer is defined in a StringBuilder named ‘image‘:

| <Y:"${"(<NAME)+ "}" >
        {
        String oldValue=image.toString();
        image.setLength(0);
        image.append(my_dict.get(oldValue));
        }