Prefer the macro-only version provided by easy-mmode.el.
* emacs-lisp/easy-mmode.el (define-derived-mode): New name for
`easy-mmode-define-derived-mode'.
Use `combine-run-hooks'.
(easy-mmode-define-navigation): New macro.
(easy-mmode-set-keymap-parents, easy-mmode-define-syntax): New functions.
(easy-mmode-defmap, easy-mmode-defsyntax, easy-mmode-define-derived-mode):
New macros.
(easy-mmode-define-toggle): New BODY arg; Never append `-mode';
Use defcustom for the hooks; Improve the auto-generated docstrings.
(easy-mmode-define-minor-mode): Renamed `define-minor-mode'.
(define-minor-mode): Add BODY arg; Only declare the keymap if
provided; Improve the auto-generated docstrings.