If this resource is visible externally to the computation, what was its argument number? < 0 means "not visible externally".
| 64 | // argument number? |
| 65 | // < 0 means "not visible externally". |
| 66 | int arg_num() const { return arg_num_; } |
| 67 | |
| 68 | // A descriptive name for the resource, used in error messages. |
| 69 | const string& name() const { return name_; } |