Function commit

include/boost/asio/buffer.hpp:1973–1977

@b DynamicBuffer_v1: Move bytes from the output sequence to the input sequence. * @param n The number of bytes to append from the start of the output * sequence to the end of the input sequence. The remainder of the output * sequence is discarded. * * Requires a preceding call prepare(x) where x >= n , and * no intervening operations that modify the input or output

   * output sequence is moved to the input sequence and no error is issued.
   */
  void commit(std::size_t n)
  {
    size_ += (std::min)(n, string_.size() - size_);
    string_.resize(size_);
  }
#endif // !defined(BOOST_ASIO_NO_DYNAMIC_BUFFER_V1)

  /// @b DynamicBuffer_v2: Grow the underlying memory by the specified number of