Re: [O] babel C, C++, D enhancement

[Thierry Banel]

Hi Achim.

You are right, INT_MAX is the C++ constant to compare to.
It is defined in limits.h

I'm not sure I want to locate limits.h (where is it ? are there several
versions ?),
and parse it, all from within Emacs-lisp...
And this will have to be done for all languages (Python, Perl, Java, and
so on),
not just C++.

Or we could assume that INT_MAX is always 2147483647.
(Which of course is not true).

Not so easy...

Regards
Thierry

Le 16/06/2014 20:28, Achim Gratz a écrit :
> Thierry Banel writes:
>> So Babel C++ may cause problem for large integers.
>> I am not sure how we can fix this in any case.
> You'd need to know INT_MAX and give an error for larger values or use an
> integral type that is large enough to handle Emacs' integer (which would
> most likely be necessary for any Emacs that uses wide integer).
>
>> In the meantime, we can force large values to be declared as doubles by
>> adding dot zero
>> like this:
>>
>> #+BEGIN_SRC C++ :var large=9876543210 .0
>> printf ("%g", large);
>> #+END_SRC
> That will lose precision, so it may not be the right thing either.
>
>
> Regards,
> Achim.