oeisstream& operator = (const oeisstream &rhs)
Clears the current stream and sets the input source of this stream to be the
same as the one in the assigned stream. If the copy
parameter was set
to true on the assigned stream, the stream will create its own local copy to
read from, otherwise it will just point to the same place in memory as the
assigned stream. In addition, the stream's reading pointer will be set to the
same location as the one in the assigned stream.