CYC_HEAP_PARENT
CYC_HEAP_LEFT(CYC_HEAP_PARENT(ndx)) == ndx ? " " : "", me,
CYC_HEAP_LEFT(CYC_HEAP_PARENT(ndx)) == ndx ? "" : " ");
heap_parent = CYC_HEAP_PARENT(heap_current);
heap_parent = CYC_HEAP_PARENT(heap_current);