bug#12392: emacs-gtk misinterprets floating-point numbers under certain locales on openSUSE 12.2

[Holger Arnold <holgerar@gmail.com>]

Eli Zaretskii wrote:
>>> How can Emacs do both?  How can it display "4.0" for the result of
>>> '(* 2.0 2.0)', but "23,4%" in a message like "Your disk is 23.4% full."?
>>
>> What do you mean by "how"?  Technically, philosophically, ...?
>
> The former, of course.
>
>> How can GCC print localized error messages, but still not accept
>> 'double x = 0,25 * 1,0;' in a C program?
>
> In our case, we are talking about two instances of output.

Should I have said: "How can GCC print localized error messages 
containing (non-localized) C statements"?  Are you seriously saying that 
you see a hard technical problem here?

>> I assume that most Emacs users can tell whether they are interacting with the
>> Lisp interpreter or the "other" user interface.  So, what's the problem?
>
> We are not talking about users, we are talking about Emacs, which is a
> computer program.  It needs to be able to differentiate between these
> two instances of output, if you want it to use different decimal
> separators in each case.

I assume that Emacs already has functions for printing and parsing Lisp 
statements.  Simply make them locale-independent.  If you have to print 
a localized string that contains a Lisp expression, insert the output of 
the Lisp printer into that string.  No Super-Turing powers required.

         Holger