cannot add \frownie to pretty-list

[Uwe Brauer]

Hi all

I am using now emacs 29 master and enjoy Lars emoji insert menu.

So I thought why not adding emoji to the pretty-symbol list.
But this symbol seems to cause problems: ☹️. 

Please consider this piece of code

(defun tex--prettify-symbols-compose-p (_start end _match) ; not necessary
  (or (not (eq ?w (char-syntax (char-before end))))
      (let* ((after-char (char-after end))
             (after-syntax (char-syntax after-char)))
        (not (or
              ;; Don't compose \alpha@foo.
              (eq after-char ?@)
              ;; The \alpha in \alpha2 or \alpha-\beta may be composed but
              ;; of course \alphax may not.
              (and (eq after-syntax ?w)
                   (not (memq after-char
                              '(?0 ?1 ?2 ?3 ?4 ?5 ?6 ?7 ?8 ?9 ?+ ?- ?' ?\"))))
              ;; Don't compose inside verbatim blocks.
              (eq 2 (nth 7 (syntax-ppss))))))))

(dolist (el '(
              ;; doble stack
              ("\\smiley" . ?🙂); works
              ("\\frowie" . ?☹️); gives error
              ("\\varrho" . ?ϱ)))
  (add-to-list 'tex--prettify-symbols-alist el)) 




What is the problem?

Uwe Brauer

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