Cannot link C++ template ; pls help ...

Hello,

I am trying to use templates in my C++ application, but it looks like the definition of the template instance fails to be found in case it is defined in a different module.

I read the IBM docs regarding templates and their suggestions to use either TEMPLATE(*TEMPINC) or TMPLREG(*DFT ) but none works.

Here is the example , containing three objects :

H/IONUT : header declaring one normal class , Order, and one template class , Record<T> ; please not Record's public constructor is defined outside this object
QCSRC/IONUT : defines Record's public constructor
QCSRC/IONUTMAIN : main ; instantiates an object or type Record<Order>

When compiling, both IONUT and IONUTMAIN *MODULEs compile successfully; when binding them into the IONUT *PGM, however, the error comes like this :

Definition not found for symbol '__ct__Q2_5ionut6RecordXTQ2_5ionut5Order_Fv'

This suggests to me that the linker cannot find Record's constructor which is defined in QCSRC/IONUT ; if , however, I define it inline, in H/IONUT , it works fine.

Both *MODULEs and the program are creates as follows :

CRTCPPMOD MODULE($IRB1201/IONUTMAIN) SRCFILE($IRB1201/QCSRC) SRCMBR(IONUTMAIN) OUTPUT(*PRINT) DBGVIEW(*SOURCE) TEMPLATE(*TEMPINC)
CRTCPPMOD MODULE($IRB1201/IONUT) SRCFILE($IRB1201/QCSRC) SRCMBR(IONUT) OUTPUT(*PRINT) DBGVIEW(*SOURCE) TEMPLATE(*TEMPINC)
CRTPGM PGM($IRB1201/IONUT) MODULE(IONUTMAIN IONUT)

Here is the full source code :

H/IONUT
-----------
#ifndef __IONUT_H__
#define __IONUT_H__

namespace ionut {

class Order {
public:
Order() {}
};

template<class T>
class Record {
T t;
public:
Record();
T & getRecord(){
return t;
}
};

} // namespace ionut

#endif

QCSRC/IONUT
------------------

#include "IONUT.H"

using namespace ionut;

template<class T>
Record<T>::Record() {
}

QCSRC/IONUTMAIN
-------------------------

#include <iostream>

#include "IONUT.H"

using namespace ionut;

int main(int argc, char * argv[]) {

std::cout << "Program started ..." << std::endl;

Record<Order> orderRecord;
Order order = orderRecord.getRecord();

std::cout << "Program ended. " << std::endl;

return 0;
}

May I kindly ask you for any suggestions you might have in order to make the above source code work ?

Thank you,
Ionut





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