Variable: ido-cannot-complete-command
ido-cannot-complete-command is a customizable variable defined in
ido.el.gz.
Value
ido-completion-auto-help
Documentation
Command run when ido-complete can't complete any more.
The most useful values are ido-completion-help, which pops up a
window with completion alternatives; ido-completion-auto-help,
which does the same but respects the value of
completion-auto-help; and ido-next-match or ido-prev-match,
which cycle the buffer list.
This variable was added, or its default value changed, in Emacs 28.1.
Source Code
;; Defined in /usr/src/emacs/lisp/ido.el.gz
(defcustom ido-cannot-complete-command #'ido-completion-auto-help
"Command run when `ido-complete' can't complete any more.
The most useful values are `ido-completion-help', which pops up a
window with completion alternatives; `ido-completion-auto-help',
which does the same but respects the value of
`completion-auto-help'; and `ido-next-match' or `ido-prev-match',
which cycle the buffer list."
:version "28.1"
:type 'function)