How to disable completion entirely for a specific shell command or alias?

Question

I have the following Bash alias which doesn't take any arguments.

alias b='cd ..'

Typing b<space> and then pressing <tab> brings up completion results for any paths in the current directory. How can I make it so that pressing <tab> does not trigger autocompletion of any kind? I have already tried complete -r b which didn't help.

Answer 1

-bash-4.2$ alias b='cd ..'
-bash-4.2$ function nope() { :; }
-bash-4.2$ complete b -F nope
-bash-4.2$ b 

So completing on the nope function appears to disable completion. Can we improve on this?

-bash-4.2$ alias b='cd ..'
-bash-4.2$ b
Display all 116 possibilities? (y or n)
-bash-4.2$ complete b -C :
-bash-4.2$ b 

appears so; the "nothing" : command avoids the need to add a do-nothing function.