To get started, I would like to be able to have some functionality from my parser. However, since it doesn't currently spit out AST trees, I would like to be able to just hightlight any errors. So my question is: Is it possible to get a handle to the error handler and hightlight code if I can find out the line/col number, etc? If so, could I get a pointer in the right direction? Or do I haveto return the ASTNode and let it be handled for me. It seems as though implementing AST trees would effectively be re-implementing the parser.