feature request (complete)

[olvar]

Hello, 
I've been trying to achieve in bash a completion similar to what you 
can have in zsh but I'm having problems with the output I get from 
the completion. Is there a way to suppress it?

It would be useful to have an option, lets say -N, that suppresses 
the output from the $COMPREPLY, as when invoked from a -F option.

For example

complete -o default -N -F _func func

will still print the matches for the default readline completion, 
but not if the matches comes from the function _func. In this way we can 
implement a formatted list of suggestions, to include useful information, 
and not only the hints.

If there is already a way to achieve something similar please let me know.
Thank you very much.