Re: C23 thoughts and opinions

David Brown <david.brown@hesbynett.no> writes:

On 24/05/2024 21:29, Keith Thompson wrote:

[...]

"static_assert" is already a macro defined in <assert.h> starting in
C11.  The above code is valid in pre-C23, but will break in C11 and C17
if it includes <assert.h> directly or indirectly. 

>
Yes.  But including <assert.h> is optional.

Your header that defines your own "static_assert" macro might depend on
some other header outside your control.  A future version of that other
header might add a "#include <assert.h>", breaking your code.

There are solutions (check "#ifdef static_assert" for the macro and
__STDC_VERSION__ for the keyword, etc.)

Perhaps it's not an issue for you, but it's a corner case to keep in
mind.

--
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
void Void(void) { Void(); } /* The recursive call of the void */