Is there a way to integrate a undo/redo system in an already
existing app without a huge amount of recording to support it?
I.e., converting to using commands. I'd like to specify what is
going to be modified and what needs to be done to restore the
state. Given D's strong meta capabilities, I wonder if much of
this can be alleviated? A struct that monitors it's own changes
and possibly designing something using reversible delegates.
