Front-end design

Hi,


I'm developing a front-end for a program analysis tool.
This front-end have the following main characteristics:


* It must accept more than one source language (C, Cobol, Pascal,
etc.) and


* It must generate more than one internal representation (AST, CFG,
etc.) of the program.


I'm looking for a design that allow the reuse of the front-end's
components. My goal is to write the C parser once, the Pascal parser
once, the CFG builder once and the AST builder once. If I build the
AST using semantic actions embedded in the languaje's parser, I can
not use the same parser to (now) build a CFG and I will rewrite the
same semantic actions for build the AST for another language.


Do you know how to do this in an elegant way?




Thanks for your time,


Salvador Cavadini

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