rl_store_function

Install a Perl code reference as the callback backing function-pointer slot $id.

The current build stores the reference but does not yet invoke Perl-side callbacks — a future phase wires the C trampoline through.

Note

Unimplemented today Callback dispatch is a stub: the stored coderef is never invoked. rl_completion_entry_function and other function hooks therefore fall back to readline defaults.