Completing C code with D style

[kdevel]

On Thursday, 11 November 2021 at 22:30:12 UTC, forkit wrote:
[...]
>      for(int i = 0; i < sizeof(numbers) / sizeof(int); ++i) // 
> is so much safer - in C style

I made it even safer:

    for (int i = 0; i < sizeof numbers / sizeof *numbers; ++i)

Maybe the type of numbers is changed in the future. sizeof is an 
operator which needs parentheses around its argument only for 
types. sizeof (non-type-arg) alleges a binding that does not 
exist:

    #include <stdio.h>
    struct bar {
       long l1;
       long l2;
    };

    #define S(a) #a, (long unsigned) a

    int main ()
    {
       struct bar *b;
       printf ("%25s = %lu\n", S(sizeof(*b)));
       printf ("%25s = %lu\n", S(sizeof(*b).l1));
       printf ("%25s = %lu\n", S(sizeof(b)->l1));
       return 0;
    }

compiles (!) and gives:

                sizeof(*b) = 16
             sizeof(*b).l1 = 8
             sizeof(b)->l1 = 8