erreur: expected constructor, destructor, or type conversion before ‘(’ token

[Belkneni Maroua]

hi, i want to inherit the functionalities from Adhoc-wifi-mac 

i have myadhoc-wifi-mac.h                                                and                                                                   myadhoc-wifi-mac.cc

#ifndef MYADHOC_WIFI_MAC_H                                                                                                                #include "myadhoc-wifi-mac.h"                                                                                                                                                                                                                                         

#define MYADHOC_WIFI_MAC_H                                                                                                               NS_LOG_COMPONENT_DEFINE ("myAdhocWifiMac");

#include "ns3/regular-wifi-mac.h"                                                                                                                  namespace ns3 {

#include "ns3/adhoc-wifi-mac.h"                                                                                                                   NS_OBJECT_ENSURE_REGISTERED (myAdhocWifiMac);

                                                                                                                                                                  TypeId

namespace ns3 {                                                                                                                                          myAdhocWifiMac::GetTypeId (void)

class myAdhocWifiMac : public AdhocWifiMac                                                                                               {

{                                                                                                                                                                 static TypeId tid = TypeId ("ns3::myAdhocWifiMac")

public:                                                                                                                                                         .SetParent<AdhocWifiMac> ()

  static TypeId GetTypeId (void);                                                                                                                   .AddConstructor<myAdhocWifiMac> ()

  myAdhocWifiMac ();                                                                                                                                   ;

  virtual ~myAdhocWifiMac ();                                                                                                                        return tid;

};                                                                                                                                                                  }

}                                                                                                                                                                   }

#endif /* MYADHOC_WIFI_MAC_H */

but when i run i have this error :  erreur: expected constructor, destructor, or type conversion before ‘(’ token

I don't find a solution for this problem, please help me.

[Konstantinos]

Hi,

As the output suggests you do not have a constructor implementation.

Either implicit implementation of the default myAdhocWifiMac in the .cc file or just an empty implementation in the .h file (myAdhocWifiMac() { } )

See for example this http://stackoverflow.com/questions/8958044/expected-constructor-destructor-or-type-conversion-before-token 

[Belkneni Maroua]

hi,

i added the constructor but i still have the same error, any suggestions?? 

[Francisco Eduardo Balart Sanchez]

It happening to me too, even with the empty constructor

It seems that when in the *.h file you add the 

NS_LOG_COMPONENT_DEFINE ("foo");

the build some how complains about a constructor of "foo" in the *.h file

In file included from ./ns3/wifi-module.h:35:0,

                 from src/wifi/bindings/ns3module.h:78,

                 from src/wifi/bindings/ns3module.cc:1:

./ns3/my_file.h:38:25: error: expected constructor, destructor, or type conversion before ‘(’ token NS_LOG_COMPONENT_DEFINE ("foo");

This does not happen for  *.cc file for example in the class aodv-neighbor.cc

#include "aodv-neighbor.h"

#include "ns3/log.h"

#include <algorithm>

namespace ns3

{

  

NS_LOG_COMPONENT_DEFINE ("AodvNeighbors");

namespace aodv

{

Neighbors::Neighbors (Time delay) : 

AodvNeighbors does not exist in the whole aodv model  but when i did a grep i got this

balart40@balart40-VirtualBox:~/Desktop/balart40/ns/ns-allinone-3.25/ns-3.25/src/aodv$ grep -rin AodvNeighbors *

bindings/modulegen__gcc_LP64.py:706:    register_Ns3AodvNeighbors_methods(root_module, root_module['ns3::aodv::Neighbors'])

bindings/modulegen__gcc_LP64.py:707:    register_Ns3AodvNeighborsNeighbor_methods(root_module, root_module['ns3::aodv::Neighbors::Neighbor'])

bindings/modulegen__gcc_LP64.py:8273:def register_Ns3AodvNeighbors_methods(root_module, cls):

bindings/modulegen__gcc_LP64.py:8326:def register_Ns3AodvNeighborsNeighbor_methods(root_module, cls):

Binary file bindings/modulegen__gcc_LP64.pyc matches

bindings/modulegen__gcc_ILP32.py:706:    register_Ns3AodvNeighbors_methods(root_module, root_module['ns3::aodv::Neighbors'])

bindings/modulegen__gcc_ILP32.py:707:    register_Ns3AodvNeighborsNeighbor_methods(root_module, root_module['ns3::aodv::Neighbors::Neighbor'])

bindings/modulegen__gcc_ILP32.py:8273:def register_Ns3AodvNeighbors_methods(root_module, cls):

bindings/modulegen__gcc_ILP32.py:8326:def register_Ns3AodvNeighborsNeighbor_methods(root_module, cls):

model/aodv-neighbor.cc:37:NS_LOG_COMPONENT_DEFINE ("AodvNeighbors");

The AodvNeighbors its mentioned in the bindings so my hunch is that it has to do obviously with the build, and 

that the logging directive

NS_LOG_COMPONENT_DEFINE ("foo");

only should be used in *.cc files, i actually observed that is not used in *.h files

Again hte empty definition of the constructor didn't work

For my class i only need a class with attributes so i don't have a *.cc file and defined the empty constructor, got same error

not sure if there is a workaround for this

[Francisco Eduardo Balart Sanchez]

Maroua, let me correct my self and complement the answer

first the use of the logging directive 

NS_LOG_COMPONENT_DEFINE ("foo");


Needs to be used  after the ns3 namespace

This is explained at: https://www.nsnam.org/docs/manual/html/logging.html#how-to-add-logging-to-your-code

Then to use a NS_LOG directive the simple but not so obvious for newbies is to add the ns3 log component with

#include "ns3/log.h"

In your *.h file and it will compile, it did with mine an i'm using ns3.25

Hope it helps

regards

Eduardo Balart