2.4 Regular Expression Matching

There is limited provision for regexp matching within Ido, enabled through ido-enable-regexp (toggle with C-t). This allows you to type ‘[ch]$’ for example and see all file names ending in ‘c’ or ‘h’.

User Option: ido-enable-regexp

If the value of this user option is non-nil, Ido will do regexp matching. The value of this user option can be toggled within ido-mode using ido-toggle-regexp.

Please note: Ido-style completion is inhibited when you enable regexp matching.