bug#67182: 29.1; read-kbd-macro always return a vector

[Stefan Monnier]

>> This is the code I was always using in Emacs to send raw keys
>> to modes like ansi-term:
>> 
>> (defun raw (str)
>>   (interactive "sSend Raw Key: ")
>>   (term-send-raw-string (read-kbd-macro str)))
>> 
>> But this doesn't work anymore it throw an error [3] when calling:
>> 
>> (raw "C-c")

The above code already threw the same error when you call

    (raw "C-<mouse-1>")
or
    (raw "M-a")
or
    (raw "é")

:-(

Maybe it should be something like

    (defun raw (str)
      (interactive "sSend Raw Key: ")
      (let ((keys (kbd str))
            (string (condition-case err
                        (concat "" keys)
                      (wrong-type-argument
                       (let ((elem (nth 2 err)))
                         (error "%s is not a character"
                                (if (numberp elem)
                                    (prin1-char elem)
                                  elem)))))))
        (term-send-raw-string string)))

?

>> According to documentation `C-h f read-kbd-macro`
>> "The result will be a string if possible" but it seems that in new
>> GNU Emacs it's always a vector.
> Stefan, this is due to your change in edmacro-parse-keys as part of
> commit 87789330, whose log message says nothing about
> edmacro-parse-keys.  Did you really intend to make that
> backward-incompatible change?  If so, why?

Yes.  I want to eliminate the use of strings that stand for a sequence
of events because it does nothing more than leave latent bugs and create
confusion (between the strings used as input to `read-kbd-macro` and the
strings that used to be output by `read-kbd-macro`), while increasing
the complexity of the rest of the code which has to handle both vectors
and strings.


        Stefan