Inline local variables for triggers?

I was just wondering, in the function signature for:

TriggerAddAction(trigger whichtrigger, code callback)

If it's possible to add literal code in place of the 'code callback' variable, rather than a 'function callbackfunction'. If so, is it possible for this code to use local variables inherent to whatever function called TriggerAddAction? Thanks for your time...

I am pretty convinced that it won't work.

from my test
local code c=function foo
would crash.