reb-mode
reb-mode is an interactive compiled Lisp function in `re-builder.el
'.
(reb-mode)
Major mode for interactively building Regular Expressions.
This mode runs the hook `reb-mode-hook', as the final step
during initialization.
key binding
--- -------
C-c Prefix Command
C-c C-b reb-change-target-buffer
C-c C-c reb-toggle-case
C-c C-e reb-enter-subexp-mode
C-c TAB reb-change-syntax
C-c C-q reb-quit
C-c C-r reb-prev-match
C-c C-s reb-next-match
C-c C-u reb-force-update
C-c C-w reb-copy