I can't make sense of what you're saying. See the page I linked in my previous post for an example of what we're talking about: https://gcc.gnu.org/onlinedocs/g

I can't make sense of what you're saying. See the page I linked in my previous post for an example of what we're talking about: https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html #define maxint(a,b) \ ({int _a = (a), _b = (b); _a > _b ? _a : _b; }) >Note that introducing variable declarations (as we do in maxint) can cause variable shadowing [...] this example using maxint will not [produce correct results]: int _a = 1, _b = 2, c; c = maxint (_a, _b);