struct FOO 
{
	char data[10];
};

struct BAR
{
	char data[10];
};

void zero_foo(FOO &foo)
{
	memset(&foo,sizeof(foo));
}

void zero_bar(BAR &bar)
{
	memset(&bar,sizeof(bar));
}

void do_stuff(void)
{
	FOO tmp_foo;
	BAR tmp_bar;

	zero_foo(tmp)// <- Typing tmp suggest tmp_bar see attached suggestion see attached image.
}