Generating functions at runtime is pretty simple in Perl. And your desire to avoid repetitive source code by doing so is worthy and desirable.

But I cannot make sense of your example -- which I suspect you've typed into the browser manually given the typo in calback_reply rather than cutting and pasting from actual code.

• None of the identifiers in your first sample seem to match up with anything in your second. <
• You show a single string containing "parameter names": "comma-separated-param_names".

  But I cannot relate this to anything in the second sample.

• Do you actually have a subroutine called: callback_wrapper()?

  Or is that a 'placeholder' for a name that would need to be generated?

Basically what I'm saying is: Yes, what you want to do is both possible and a good idea, but if you want some help on how to do it, then you're going to have to post some real examples of the subs you want to generate -- even if you feel the need to change the function and parameter names a little to "protect the innocent" -- so we can get a feel for the pattern involved.