Subtract the specified rhs time interval from this object.
Subtract from this time interval the value of the specified rhs time interval, and return a reference providing modifiable access to this object. The behavior is undefined unless LLONG_MIN != rhs.seconds(), and the total number of seconds in the resulting time interval can be represented with a 64-bit signed integer.
a reference providing modifiable access to this object
| Name | Description |
|---|---|
| rhs | right-hand time interval |