Re: Why different behaviour of concat on OSX and on Lubuntu

[Guido Van Hoecke]

Hi Michael,

Thanks for your reply.

I couldn't get this to work. Being pressed for time I just changed to
(if isOSX
    (global-set-key (kbd "M-§") 'overwrite-mode)
  (global-set-key (kbd "M-²") 'overwrite-mode))

With kind regards,

Guido.

On 28 May 2013 22:34, Michael Heerdegen <michael_heerdegen@web.de> wrote:
> Guido Van Hoecke <guivho@gmail.com> writes:
>
>> Part of the code looks like this:
>> ;; check whether running on OSX
>> (setq isOSX (equal (expand-file-name "~/") "/Users/guivho/"))
>>
>> (if isOSX
>>     (setq leader "§")
>>   (setq leader "²"))
>>
>> (global-set-key (kbd (concat "M-" leader)) 'overwrite-mode)
>>
>> The last statement maps overwrite-mode to the M-§ sequence on my iMac.
>>
>> On the Lubuntu machine, it does not map M-² to overwrite-mode, It barks:
>>
>> (wrong-type-argument integer-or-marker-p (concat "M-" leader))
>>   read-kbd-macro((concat "M-" leader)
>> [...]
>> I am puzzled why the concat does not work on lubuntu, and would like
>> to know how to code it to achieve the desired effect.
>
> `kbd' was a (quite strange) macro in Emacs 23.  It changed to a function
> in Emacs 24.  Your code works only in the last case.  Call it a bug in
> Emacs 23.
>
> As long as you need to use both Emacs versions in parallel, you should
> be safe when you use `read-kbd-macro' instead of `kbd'.  It does the
> same, but should work in both versions.
>
>
> Regards,
>
> Michael.