Trouble assigning to keys in Emacs Modified for MacOS 30.2

I am running Vincent Goutet=E2=80=99s Emacs Modified for MacOS 26.2 under M=
acOS 26.2 and have hit a problem which I have not encountered running Emacs=
/ESS under Linux distros or Windows.  I am trying to assign the R operators=
 <- and %>% to keys using variations of the following code in my .emacs:

;;; Pipe operator (magrittr %>% or |>) defined and bound to Cntl-|
;;; https://emacs.stackexchange.com/questions/8041/how-to-implement-the-pip=
ing-
;;;                                                         operator-in-ess=
-mode
;; (defun then_R_operator ()
;;  "R  |> pipe operator"
;;  (interactive)
;;  (insert " %> %")
;;  (reindent-then-newline-and-indent))
;; (define-key inferior-ess-r-mode-map (kbd "C-|") 'then_R_operator)
(use-package ess
  :bind (:map ess-r-mode-map
         ("C-|" . " %>% ")
         :map inferior-ess-r-mode-map
         ("C-|" . " %>% ")))
;;; Produces compile error:
;;;------------------------------------------------------------------------=
-----
;;; Bind <- to C-=3D
;; (defun R-left-assign ()
;;   "R - <- left assignment operator"
;;  (interactive)
;;  (insert " <- "))
;; (define-key inferior-ess-r-mode-map (kbd "C-=3D") 'R-left-assign)
(use-package ess
  :bind (:map ess-r-mode-map
         ("C-=3D" . " <- ")
         :map inferior-ess-r-mode-map
         ("C-=3D" . " <- ")))
;;; Produces compile error:

Everything I have tried fails with byte-compilation like ""Error (use-packa=
ge): ess/:catch: Symbol=E2=80=99s value as variable is void: ess-r-mode-map=
=E2=80=9D.  So it seems that inferior-ess-r-mode-map and ess-r-mode-map mig=
ht not defined in the implementation of ESS imbedded in Emacs Modified for =
MacOS.  I must confess that I lack any skill with Emacs Lisp,

Is there a successful way to assign R operators to keys for Emacs Modified =
for MacOS.

Thanks!!!

Steve Gutreuter
[email protected]




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