[antlr-interest] implementing C-style #define macros in ANTLR

[Bruce Bauman]

I am trying to convert 4 million lines of Pascal code from the MetaWare Pascal compiler to Free Pascal. (yes, really). Unfortunately, MetaWare Pascal supports many non-standard extensions to Pascal, including C-style macros. Our existing Pascal code base uses the macro feature extensively..
 
Any suggestions on how to implement this? Any examples in existing ANTL grammars?
 
Thanks.