Function increment

3rd/asio-1.24.0/include/asio/buffers_iterator.hpp:354–374

Increment the iterator.

  // Increment the iterator.
  void increment()
  {
    ASIO_ASSERT(current_ != end_ && "iterator out of bounds");
    ++position_;

    // Check if the increment can be satisfied by the current buffer.
    ++current_buffer_position_;
    if (current_buffer_position_ != current_buffer_.size())
      return;

    // Find the next non-empty buffer.
    ++current_;
    current_buffer_position_ = 0;
    while (current_ != end_)
    {
      current_buffer_ = *current_;
      if (current_buffer_.size() > 0)
        return;
      ++current_;
    }
  }

  // Decrement the iterator.
  void decrement()