cond6.c

this is a gcc file, you can download it and learn its usetility, for further detail please look at t

// Test that the result of `x ? const E : E' is an E rvalue.
// Contributed by Jason Merrill <[e-mail]>

enum E { a };

bool b;

int main ()
{
  E e1 = a;
  const E &er = e1;
  E e2 = b ? er : a;		// OK
  const E* ep = &(b ? er : a);	// ERROR - non-lvalue
}