Talking about CL, all the things that are done with syntax objects are done with environments (`&environment`). Type declarations, lexical bindings, etc. You ca

Talking about CL, all the things that are done with syntax objects are done with environments (`&environment`). Type declarations, lexical bindings, etc. You can even process the same code in two different environments if this is useful. Other bindings from symbols to values can be stored in the symbols themselves: things like original code source (as a string; I recovered deleted code thanks to that in the past), original location, custom properties, etc.