Uh, I don't understand what you are asking about PPI? But I wish I published earlier so you asked it a few weeks ago. :-) It is like this: A routine trawling some Perl code after use statements aren't hard to do with PPI, almost a oneliner. PPI works well for me. As it is, it will need to be two phases (first to find declarations). I will put up changes the coming weekend, I hope.

This transpiler is in Perl, so it will be slower to compile than Perl (edit: for instance, see the deep dive into use:d files). In the end, it will probably be generation of a compiled file, with runtime etc. (Edit: I also saw tries with compiled bytecode, now I understand why it never became a thing.)

Edit: I am trying to solve BEGIN now, that is trickier than sub prototypes. But totally doable in CL. The problem now, is that my attempt at a demonstration Perl transpiler to get something to compile to other languages is getting a too complex output.