Self evaluating results of rb-tree lookups?

[TedWalther]

I want to stash some code in red-black trees. I'd like it to automatically execute when I access it.

For instance,

(foo "bar" '(println "hi"))

When I do

(foo "bar")

I want the result to be

true

And also have the side effecting of printing "hi" to the console.

What is the best way to go about doing this?

[TedWalther]

I just had to overcome my fear of eval. Problem solved.