Не могу разделить template метод в .h и .cpp файлы

#pragma once 
#include <Windows.h>
 
class Class
{
public:
    static void getSmth();
    /* Parameters: timeout, pointer to function, arguments list */
    template <typename ... Args>
    static bool smartWaiter(DWORD timeout, bool(*func)(Args ...), Args ... args);
 
};

#include "class.h"
 
void Class::getSmth()
{
 
}
 
/* Parameters: timeout, pointer to function, arguments list */
template <typename ... Args>
bool Class::smartWaiter(DWORD timeout, bool(*func)(Args ...), Args ... args)
{
    DWORD start = ::GetTickCount();
    bool result = func(args ...);
    while (!result && ::GetTickCount() - start < timeout)
        result = func(args ...);
 
    return result;
}

/* Some sample of smart waiter... */
 
#include "class.h"
#include "class.cpp"
 
#include <Windows.h>
#include <iostream>
#include <vector>
#include <algorithm>
#include <iterator>
 
 
bool someFunc(int a, const char* str, char* x)
{
    // some operations which depend on time/state
    return true;
}
 
int main()
{
    const DWORD DEFAULT_TIMEOUT = 1000;
 
    bool result;
    std::vector<bool> results;
 
    result = Class::smartWaiter <int, const char*, char*> (DEFAULT_TIMEOUT, someFunc, 1, "Yeap", "x");
    results.push_back(result);
 
    std::copy(results.begin(), results.end(), std::ostream_iterator<bool>(std::cout, " \n"));
 
    system("pause");
}

    static void DisconnectElevationUtility();
    
    static void WriteLogGen(PCWSTR pszMessage, WORD wType, PWSTR FunctionName, PWSTR file);
    
    /* Parameters: timeout, pointer to function, arguments list */
    template <typename ... Args> 
    static bool smartWaiter(DWORD timeout, bool(*func)(Args ...), Args ... args);

/* Parameters: timeout, pointer to function, arguments list */
template <typename ... Args>
bool EUCommon::smartWaiter(DWORD timeout, bool(*func)(Args ...), Args ... args)
{
    DWORD start = ::GetTickCount();
    bool result = func(args ...);
    while (!result && ::GetTickCount() - start < timeout)
        result = func(args ...);
 
    return result;
}

#include "class.h"
 
#include <Windows.h>
#include <iostream>
#include <vector>
#include <algorithm>
#include <iterator>
...

   static void DisconnectElevationUtility();
    
    static void WriteLogGen(PCWSTR pszMessage, WORD wType, PWSTR FunctionName, PWSTR file);
    
    /* Parameters: timeout, pointer to function, arguments list */
    template <typename ... Args> 
    static bool smartWaiter(DWORD timeout, bool(*func)(Args ...), Args ... args);
 
#include "class.inl"