What I mean is that I want to type
and it should show me a shortened list of files starting with
'a'. When I type
b, it would automatically update this list to show only files starting with
Vim's wildmenu does not cut it as it is not updated interactively as I type (as it is in Emacs). I have to constantly press
<TAB> for it to update (after I type anything).
In other words I'm looking for something similar to CtrlP, but something that would integrate itself with vim's command line and would work for all cases whenever wildmenu could be/is used (not something invoked via a special shortcut).