()
| 585 | |
| 586 | // Swap inputs without letting either input go dead during the swap. |
| 587 | Node swap12() { |
| 588 | unlock(); // Hash is order dependent |
| 589 | _inputs.swap(1,2); |
| 590 | return this; |
| 591 | } |
| 592 | |
| 593 | /** |
| 594 | * Does this node contain all constants? Ignores in(0), as is usually |