ATL / WTL / STL

hrishi321 wrote:

but it shows linking errors

hrishi321 wrote:

FOR SOME REASON , I DON'T WANT TO PUT THE METHOD'S DEFINITIONS IN .h FILE

CThing thing = new CThing();

hrishi321 wrote:

does it mean to say, that I can put my class(template) method definitions in .cpp file?

template <class T> class CMyTemplate
{
 public:
  virtual void Method1(void*);
};

template <class T>
void CMyTemplate<T>::Method1(void*){}

template <class T>
void CMyTemplate<T>::Method1(T TDummy)
{
    TDummy = TDummy + 1;
}

TestProject.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall CMyTemplate<int>::Method1(int)" (?Method1@?$CMyTemplate@H@@UAEXH@Z)

#include <iostream>

using namespace std;


template <class T> 
class CMyTemplate
{
public:
	virtual void Method1(T& TDummy);
};

template <class T>
void CMyTemplate<T>::Method1(T& TDummy)
{
	TDummy = TDummy + 1;
}

int wmain()
{
	int					zz = 25;
	CMyTemplate<int>	objT;
	objT.Method1(zz);
	wcout << L"Value of the dummy: " << zz << endl;

	return 0;
}

Could anyone please tell me, is there any way to separate the definition of the methods of a template class ,from header file to .cpp file.

template <class T>
void CMyTemplate<T>::Method1(T& TDummy)
{
	TDummy = TDummy + 1;
}

template <class T> 
class CMyTemplate
{
public:
	virtual void Method1(T& TDummy);
};

-------------------------------------
-- In my_template.h file
...
template <typename T>
T my_temp_func(const T& t);

-------------------------------------
-- In my_template.cpp file

#include "my_template.h"

// Definition
template <typename T>
T my_temp_func(const T& t)
{
  return t;
}

// Instantiation declaration
int my_temp_func<int>(const int& t);

-------------------------------------
-- In using_my_template.cpp
#include "my_template.h"
...
int i = my_temp_func<int>(4); // works
string s = my_temp_func<string>("Abob"); // link error