Re: Loops (was Re: do { quit; } else { })

On 23/04/2025 18:05, David Brown wrote:

On 23/04/2025 00:02, Keith Thompson wrote:

C23 does not have _Lengthof.  It's proposed for C2y.
>

 Sorry, yes.  The pdf I was viewing was the latest draft for post-C23 rather than C23.  My mistake.

Actually, my C compiler has 'lengthof'. I'd got rid of most experimental bits in the lastest version, but that got left in:
   #include <stdio.h>
   int main(void) {
       int A[100];
       printf("%zu\n", lengthof(A));              # shows 100
   }
Looking at the sources, it is a sub-operator of 'sizeof' and its implementation took under 30 extra lines.
It works for expressions and types, just like sizeof.