C ++：错误：无法转换&#39;ns3 :: TracedValue <ns3::SequenceNumber<unsigned int, int> &gt;&#39;到&#39;uint32_t {aka unsigned int}

Question

I am trying to cast TracedValue<uint32_t> m_bytesInFlight to uint32_t but I get the following error

 error: cannot convert ‘ns3::TracedValue<ns3::SequenceNumber<unsigned int, int> >’ to ‘uint32_t {aka unsigned int}

Function prototype and variable declarations are

uint32_t UnAckDCount (void) const;

TracedValue<uint32_t>  m_bytesInFlight {0};        //!< Bytes in flight

Here i am calling the function

uint32_t 
TcpSocketBase::UnAckDCount () const
{
  return m_tcb->m_highTxMark - (uint32_t) m_tcb->m_bytesInFlight;
}

Please suggest some method so that I can execute the return statement to get the result. Thanks in advance

Answer 1

Changing m_tcb->m_highTxMark to m_tcb->m_highTxMark.Get().GetValue() should work.

Seeing the compiler error, it's easy to figure out that variable m_highTxMark is of type ns3::TracedValue<ns3::SequenceNumber<unsigned int, int> > . I checked the documentation of ns3::TracedValue and ns3::SequenceNumber , they both have getter functions Get() and GetValue() respectively.

See:

https://www.nsnam.org/doxygen/classns3_1_1_traced_value.html https://www.nsnam.org/doxygen/classns3_1_1_sequence_number.html