Type cast doesn't work in ternary operator

wangwzc wangwzc@sina.com
Mon Mar 2 08:16:00 GMT 2015


The code is as following, when I change the Line15 to (*((struct b_t
*)(&dst)) = *((struct b_t *)(&src))) , or I change the Line16 to (*((struct
a_t *)(&dst)) = *((struct a_t *)(&src))), it's OK. Quite strange, why two
kind of type cast doesn't work.

# gcc a.c
a.c: In function `main':
a.c:15: error: type mismatch in conditional expression

========== a.c =============
struct a_t {
	int		sa_family;
};

struct b_t {
	int 	sa_family;
};

int main()
{
	struct b_t dst, src;

	(src.sa_family == 1) ?
	(*((struct a_t *)(&dst)) = *((struct a_t *)(&src))) :	
	(*((struct a_t *)(&dst)) = *((struct a_t *)(&src)));

	return 0;
}




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