cons int manipulation

[rahulsinner]

Hi,

Consider the following.

#include <stdio.h>

int main()
{
const int i=10;
int *ptr=&i;
*ptr=20;
return 0;
}

This code compiles with a "suspicious pointer conversion" warning and
thus, is able to voilate the integrity of constants.
What does the standard say about it?

Rahul

 

[Chris Dollin]

Hi,

Consider the following.

#include <stdio.h>

int main()
{
const int i=10;
int *ptr=&i;
*ptr=20;
return 0;
}

This code compiles with a "suspicious pointer conversion" warning and
thus, is able to voilate the integrity of constants.
What does the standard say about it?

I expect it says that it's a constraint violation and that a diagnostic
must be issued - which it was.

Perhaps your compiler has knobs that will make warnings into don't-produce-
object-code errors. Turn them up.