> Thus you can write a C23 detector Can't you just check `__STDC_VERSION__` ? (Or, is your way a "But, where's the fun in that?" exercise? Actually, if you're

> Thus you can write a C23 detector Can't you just check `__STDC_VERSION__` ? (Or, is your way a "But, where's the fun in that?" exercise? Actually, if you're an ioccc entrant, "where's the fun in that?" does suddenly become a leading hypothesis ;-)