How can I get Scala ToolBox to see REPL definitions?

Question

Back when reflection was still incipient, on the days of Scala 2.10.0 milestones, I asked a question about how could I use it to see the trees of code snippets from REPL. The ex

Answer 1

Recently I dug into repl, when trying to make it support type macros, so I'm well equipped to explain why it doesn't work. Getting it to work would be the next step :)

I know that you know that every snippet entered into repl gets wrapped into some boilerplate before being compiled. Therefore that x ends up being a field in a nested-nested-nested object in a package with a weird name.

Apparently, repl keeps track of all defined symbols and then injects the necessary imports along with the boilerplate it generates. Therefore subsequent lines can see that x unqualified. To the contrast, toolboxes simply reuse repl's classloader, but don't do anything about the imports, hence the failure.

A workaround would be to somehow get to an object representing a repl, ask it about defined symbols and then generate corresponding imports into the code that you feed to a toolbox. If you file a ticket, I'll try to code up a workaround after the 2.10.1 code freeze madness ends (supposedly, end of this week).