/*
 * thing.h
 *
 * Thing declaration.
 */

#ifndef THING_H
#define THING_H

template <typename T>
T thing(T t);

#endif

/*
 * thing.cpp
 *
 * Thing definition.
 */

#include "thing.h"

template <typename T>
T thing(T t)
{
    return t;
}

/*
 *
 * main.cpp
 *
 */

#include "thing.h"
#include <iostream>

int main()
{
    std::cout << thing(0);
    return 0;
}