instantiate a class thu a template

currently everything is in the header file ! Interface.h, testArea.h.


The errors are
storetest.o(.text+0x29):storetest.cpp: undefined reference to `testArea<Interface>::testArea(void)'
storetest.o(.text+0x40):storetest.cpp: undefined reference to `testArea<Interface>::~testArea(void)'

storetest.o(.text+0xf2):storetest.cpp: undefined reference to `testArea<Interface>::~testArea(void)'

storetest.o(.testArea<Interface>::text$getSerid(void)+0x24):storetest.cpp: undefined reference to `I
nterface::Interface(void)'
storetest.o(.testArea<Interface>::text$getSerid(void)+0x3b):storetest.cpp: undefined reference to `I
nterface::~Interface(void)'
storetest.o(.testArea<Interface>::text$getSerid(void)+0x53):storetest.cpp: undefined reference to `I
nterface::serid(void)'
storetest.o(.testArea<Interface>::text$getSerid(void)+0x72):storetest.cpp: undefined reference to `I
nterface::~Interface(void)'
collect2: ld returned 1 exit status

Elaborating on jkr's answer (it's his points if this was the problem):

// main program

#include "constants.h"
#include "Interface.h"
#include "testArea.h"

int main()
{
      testArea<Interface> winview;
      cout << "id is: " << winview.getSerid() << endl;

      return 0;
}



// testArea.h

#ifndef TESTAREA_H
#define TESTAREA_H

template <class blockshape>
class testArea {
      public:
            testArea();
            ~testArea();

            string getSerid();
};

template <class blockshape>
testArea<blockshape>::testArea() {
      // do whatever here
}

template <class blockshape>
testArea<blockshape>::~testArea() {
      // do whatever here
}

template <class blockshape>
string testArea<blockshape>::getSerid() {
      blockshape sb;
      return sb.serid();
}

#endif



// interface.h

#ifndef INTERFACE_H
#define INTERFACE_H

class Interface {
      public:
            Interface();
            ~Interface();
            string serid();
            void supply(byte* trigs[NUM_TRIGS]);

      private:
            static byte blockInterface[SEEDBLOCKLEN];
            byte trigger[NUM_TRIGS];
};

#endif




// interface.cpp

Interface::Interface() {
      // do something
}

Interface::~Interface() {
      // do something
}

string Interface::serid() {
      // do something, return a string
}

void supply(byte* trigs[NUM_TRIGS]) {
      trigger[0] = *trigs[0];
}

Is any destructor declared as 'virtual'?

yes, thanks. There were no function definitions. Now it did link.