error: expected constructor, destructor, or type conversion before ‘enum’ while building in linux with make

ravi2k18

Hi,

I am facing below build error while building the qt project.

/home/ravi/> make
g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -fPIC -DQT_WEBKIT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -std=c++11  -I/usr/share/qt4/mkspecs/linux-g++-64 -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4 -I. -o discoverythread.o onvif/discoverythread.cpp
In file included from onvif/discoverythread.cpp:2:0:
./onvif/discoveryobj.h:10:1: error: expected constructor, destructor, or type conversion before ‘enum’
 enum DiscoveryMode{
 ^
./onvif/discoveryobj.h:31:5: error: ‘DiscoveryMode’ does not name a type
     DiscoveryMode mode;
     ^
./onvif/discoveryobj.h:39:32: error: expected ‘)’ before ‘mode’
     DiscoveryObj(DiscoveryMode mode, int _metadataVersion, char* _xaddr, char* _type, char* _scope, char* _endpoint);
ravi@134.141.242.126:/home/ravi/cprog/OnvifDiscoveryLib/>make
g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -fPIC -DQT_WEBKIT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -std=c++11  -I/usr/share/qt4/mkspecs/linux-g++-64 -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4 -I. -o discoverythread.o onvif/discoverythread.cpp
In file included from onvif/discoverythread.cpp:2:0:
./onvif/discoveryobj.h:10:1: error: expected constructor, destructor, or type conversion before ‘enum’
 enum DiscoveryMode{
 ^
./onvif/discoveryobj.h:31:5: error: ‘DiscoveryMode’ does not name a type
     DiscoveryMode mode;
     ^
./onvif/discoveryobj.h:39:32: error: expected ‘)’ before ‘mode’
     DiscoveryObj(DiscoveryMode mode, int _metadataVersion, char* _xaddr, char* _type, char* _scope, char* _endpoint);
                                ^
Makefile:299: recipe for target 'discoverythread.o' failed
make: *** [discoverythread.o] Error 1

// File name: discoveryobj.h

#ifndef prob_H
#define prob_H

#include <QVector>
#include <QString>
#include <QObject>
#include "descdevice.h"
#include "discoverythread.h"

enum DiscoveryMode{
    SERVER_MODE, CLIENT_MODE
};

class DiscoveryObj: public QObject{

    Q_OBJECT   
signals:
    void discoveredDevice(DescDevice);

private:
    DiscoveryThread discoveryThread;

public:
//    const int   _metadataVersion = 1;
//    const char* _xaddr="http://localhost/service";
//    const char* _type="\"http://schemas.xmlsoap.org/ws/2006/02/devprof\":device";
//    const char* _scope="scope";
//    const char* _endpoint="urn";


    DiscoveryMode mode;
    static DiscoveryObj *theDiscovery;
    int   _metadataVersion;
    char* _xaddr;
    char* _type;
    char* _scope;
    char* _endpoint;

    DiscoveryObj(DiscoveryMode mode, int _metadataVersion, char* _xaddr, char* _type, char* _scope, char* _endpoint);
    ~DiscoveryObj();

    int sendProb();
    int sendHello();
    int sendBye();
};

#endif

// Filename: discoverythread.h

#ifndef MYTHREAD_H
#define MYTHREAD_H
#include <QThread>

class DiscoveryThread : public QThread
{
    const char* host = "239.255.255.250";
    int port = 3702;
//    const int   _metadataVersion = 1;
//    const char* _xaddr="http://localhost/service";
//    const char* _type="\"http://schemas.xmlsoap.org/ws/2006/02/devprof\":device";
//    const char* _scope="scope";
//    const char* _endpoint="urn";
    Q_OBJECT
public:
    DiscoveryThread();
protected:
    void run();
};

#endif // MYTHREAD_H

// File Name: descdevice.h

#ifndef DESCDEVICE
#define DESCDEVICE

struct DescDevice{
    int metadataversion;
    QString types;
    QString xAddrs;
    QString scopes;
};

Q_DECLARE_METATYPE(DescDevice)

#endif // DESCDEVICE

can any one help me in understating what is wrong here?

thanks

jsulm

@ravi2k18 My guess is that something is wrong in one of the two header files you're including in discoveryobj.h

jsulm

@ravi2k18 Q_OBJECT must be the first line after { in your class!

J.Hilk

@ravi2k18 said in error: expected constructor, destructor, or type conversion before ‘enum’ while building in linux with make:

DiscoveryThread();

you're derving from QThread/QObject make this a proper constructor with base class initialisation