Re: Integration of the code of user defined out of date evaluation

[Ramón García]

I have been implementing the change that you request of not using
separate lists.

There is only one minor issue. The code that looks up a variable must
know when a link from a variable_set_list to the next is a
child->parent link, and therefore afterwards discard any variable with
the attribute private. This implies that when a link is created, one
must note if the link is parent/child or not. Otherwise there is no
difficulty.

> On the changes: I wonder if it wouldn't be simpler to forgo the separate
> list of inherited vs. private variables, and instead keep them all in
> the same list with just a boolean setting to declare which it is (as you
> already have).