Volatile constants?

[Andi Kleen]

Kevin Handy <kth@srv.net> writes:
> 
> After preprocess
> 
> 	int s = (-7<0 ? --7 : -7)
> 
> I'd guess that the decrement '--7' is what is causing you the problem
> This is why you should always use extra parentheses in your #defines

This is not true. ANSI-C generates tokens before preprocessing.
The tokens are not concatenated afterwards, unless you use ## 
It should be parsed as - - 7, which is legal C. Maybe some prehistoric
K&R preprocessors do it differently. 
The problem is just that inline calls are not allowed in constant
expressions, and a global definition expects a constant expression
as initializer. inline does not change the grammar here.

-Andi