Dynamic generation of parsed source

Hi,

 

I have a need to tinker with the source code while it is being parsed, in other words some parsed statements will have a direct impact on the code that follows, either being a symbolic replacement, or adhoc inclusion of source code, line by line as line is the main delimiter.

 

Is there an elegant way to handle this with Sablecc, either by having a modified reader that would feed the parser resulting lines?

 

regards

 

JFG