template

main.cpp

#include <stdio.h>

extern void print1();
extern void print2();

int main()
{
	printf("Two values printed below should be different?\n");
	print1();
	print2();
	return 0;
}

tmpl.h

#include <stdio.h>

template<typename T>
class SuperFoo
{
public:
	void print_value(T& arg)
	{
		printf("Got value: %d\n", arg.value);
	}
};

unit1.cpp

#include <stdio.h>
#include "tmpl.h"

typedef union TYPE
{
	unsigned short value;
	unsigned int integer;
} TYPE;

void print1()
{
	TYPE t;
	t.integer = -1;

	SuperFoo<TYPE> impl;
	impl.print_value(t);
}

unit2.cpp

#include <stdio.h>
#include "tmpl.h"

typedef union TYPE
{
	unsigned int value;
} TYPE;

void print2()
{
	TYPE t;
	t.value = -1;

	SuperFoo<TYPE> impl;
	impl.print_value(t);
}