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// GROUPS passed operators
// Check that operators may be (directly) recursive.
extern "C" void printf (char *, ...);
struct base {
int i;
};
base base_variable;
base operator+ (const base& left, const base& right)
{
base ret_val;
ret_val.i = left.i + right.i;
return ret_val;
}
base operator- (const base& left, int right)
{
base ret_val;
ret_val.i = left.i - right;
return ret_val;
}
// Define the unary ! operator for class base to be the fibonachi
// operator.
base operator! (const base& right)
{
if (right.i < 2)
return right;
else
return ((!(right-1)) + (!(right-2)));
}
int main ()
{
base k;
k.i = 15;
k = !k; // fib it!
if (k.i != 610)
printf ("FAIL\n");
else
printf ("PASS\n");
return 0;
}
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