void operator () (T1 x1, T2 x2, T3 x3) const
{
*stream << x1 << separator
<< x2 << separator
<< x3 << '\n';
stream->flush();
}
void flush()
{
os_->write(begin_buffer_, (p_ - begin_buffer_));
p_ = begin_buffer_;
os_->flush();
}
~buffered_ostream()
{
os_->write(begin_buffer_, (p_ - begin_buffer_));
os_->flush();
}
void operator () (T1 x1) const
{
*stream << x1 << '\n';
stream->flush();
}