Reposted by Amaury Rodriguez
Amaury Rodriguez
@amauryrodguez.bsky.social
80 followers 142 following 19 posts
Fmr. Programmer | Most importantly a proud father of two & husband • Recreational CLang/Kernel (UNIX BSD/Linux). I didn’t vote for the Felon 45-47. 🇺🇲🇺🇦
![C code that reads:
#include <stdio.h>
#define bar(x) _Generic(x, \
int v: v, \
const double: (int)2.0,\
const int v: v * 2,\
struct foo v: v.name \
)
struct foo { char* name; };
extern int x;
int fn(void) {
return x += 1;
}
double fnd(void) {
return (double)(x += 1);
}
int main() {
struct foo f = { "test" };
int v1 = _Generic(3, int v [[maybe_unused]]: 3);
printf("%d (expected: 3)\n", v1);
int v2 = _Generic(x, int v [[maybe_unused]]: v, double v: (int)v);
printf("%d (expected: 20)\n", v2);
bar(f) = "something";
printf("%s (expected: something)\n", f.name);
printf("(part 1, x before = %d)\n", x);
int v3 = _Generic(fn(), int v: 0, double v: (int)v);
printf("%d (expected: 0)\n", v3);
printf("(part 1, x after = %d)\n", x);
printf("(part 2, x before = %d)\n", x);
int v4 = _Generic(fn(), int v: v * v, double v: (int)v);
printf("%d (expected: 484)\n", v4);
printf("(part 2, x after = %d)\n", x);
printf("(part 3, x before = %d)\n", x);
int v5 = _Generic(fnd(), int v: v * v, double: 3.0);
printf("%d (expected: 3)\n", v5);
printf("(part 3, x after = %d)\n", x);
const int xc = 20;
int v6 = _Generic(xc,
int v: v * v,
double: 3.0
);
printf("%d (expected: 400)\n", v6);
return 0;
}
int x = 20;](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:5bsnuwk6gpbbhjocl6fkzs3y/bafkreib6tfvpvlqan27liez5tcp4eez5wl4plzpchamohpczd5jftjgt4e)
