Re: RFC: booleans and the kernel

Momchil Velikov
2002-01-25T07:59:58Z

>>>>> "Alexander" == Alexander Viro <viro@math.psu.edu> writes:
>> > int main()
>> > {
>> > char x;
>> >
>> > if ( x )
>> > {
>> > printf ("\n We got here\n");
>> > }
>> > else
>> > {
>> > // We never get here
>> > printf ("\n We never got here\n");
>> > }
>> > exit (0);
>> > }
>> > covell@xxxxxx ~>gcc -Wall foo.c
>> > foo.c: In function `main':
>> > foo.c:17: warning: implicit declaration of function `exit'
>>
>> I'm lost. What do you want to prove ? (Al Viro would say you just want
>> to show you don't know C ;)
>> And why do you think you never get there ?

Alexander> I suspect that our, ah, Java-loving friend doesn't realize that '\0' is
Alexander> a legitimate value of type char...

Alexander> BTW, he's got a funny compiler - I would expect at least a warning about
Alexander> use of uninitialized variable.

That warning would require data-flow analysis (reachable definitions
in this case), which is not enabled with certain levels of
optimization.