Re: SCM_POSFIXABLE(-1) fails with MSVC++ 6.0

[Dirk Herrmann]

On Fri, 23 Aug 2002, Lars J. Aas wrote:

> Lars J. Aas <address@hidden> wrote:
> : Changing the alternative definition of SCM_LONG_BITS to cast the value
> : to long like this works...
> : 
> : # define SCM_LONG_BIT ((long)(SCM_CHAR_BIT * sizeof (long) / sizeof (char)))
> 
> Come to think of it, the cast is better placed on the inside so it's more
> evident what is being done (stopping the unsigned-ness of the sizeof()-
> operations to propagate incorrectly out through the macro invokation) so
> it's not removed later by someone not knowing about this compiler bug.
> 
> # define SCM_LONG_BIT (SCM_CHAR_BIT * ((long) (sizeof (long) / sizeof 
> (char))))
> 
> or s/long/int/ on the cast?
> 
> BTW, is anyone reading these mails? ;)
> 
>   Lars J

I am not sure I understand the problem here:  is the failure of testing 
-1 <= sizeof(long) a compiler bug, or is the strange behaviour defined
in the C language?

Best regards,
Dirk Herrmann