[Pharo-users] Using SmaCC to transform AST?

Hi, We are trying to transform programs (from Delphi to Java). We already have source and target ASTs and we would like to write the transformation itself. We are wondering if we could use SmaCC to do that but we are not able to figure out how. The documentation is not clear on the fact that it is possible or not to use any AST as input. Does anyone know if it is possible? Then, in the tutorial, the example seems to be a string-based transformation while we would like to transform ASTs. Are we wrong? What have we missed? In Python tests, there are ASTs but we did not find any transformation. Has someone a clear and concise example to help us to start? Thank you in advance, Jean-Christophe