#include <stdio.h>

#define __builtin_constant_p(x) _Generic((1 ? ((void*)((x)*(uintptr_t)0)) : &(int){1}), int*: 1, void*: 0)

#define test(e) printf("%d\n", __builtin_constant_p(e));

#define ERROR 1

int main(void)
{
	int v = 1;
	test(v);
	test(ERROR);
	test(1);
	return 0;
}