Now this is rudimentary but it works

Probably with more time can be improved

ABCL-UTILS> (defun unicode-converter (stream char)
  (declare (ignore char))
  (code-char (abcl-utils:name->codepoint (symbol-name (read stream t nil t)))))
UNICODE-CONVERTER
ABCL-UTILS> (set-macro-character #\? #'unicode-converter)
T
ABCL-UTILS> ?:|BOX DRAWINGS LIGHT HORIZONTAL|
#\─
ABCL-UTILS> 

El mié, 3 ene 2024 a las 17:31, Robert Dodier (<robert.dodier@gmail.com>) escribió:
Alejandro, thanks a lot for your reply.

Is there a way, in abcl-utils, to inform the Lisp reader to recognize
named characters such as #\BOX_DRAWINGS_LIGHT_HORIZONTAL in source
code? That is the ultimate goal I am seeking.

best,

Robert