Assignment
The contents of u are copied and the previous contents of this are discarded.
this->buffer() == u.buffer() && this->buffer().data() != u.buffer().data()
Linear in u.size().
Strong guarantee. Exception thrown if capacity exceeded.
| Name | Thrown on | 
|---|---|
| system_error | Capacity would be exceeded. | 
| Name | Description | 
|---|---|
| u | The url to copy. |