Re: stack module

[Marc Nieper-Wißkirchen]

Am Sa., 23. Mai 2020 um 18:44 Uhr schrieb Paul Eggert <address@hidden>:
>
> On 5/23/20 8:55 AM, Marc Nieper-Wißkirchen wrote:
> > A combination of assure and assume would be helpful:
> >
> > #define checked_assume(X) do { assure (X); assume (X); } while (0)
>
> No, because the compiler is entitled to optimize away the 'assure (X)' in this
> case. I installed the attached to try to explain this better.

Sure, but not in "-O0" or "-Og" builds, I think. Or am I mistaken?

But it is definitely better to make it more robust and not rely on
optimization levels:

#include <assert.h>
#include "verify.h"

#ifdef NDEBUG
# define checked_assume(E) assume (E)
#else
# define checked_assume(E) assert (E)
#endif