Template Meta Programming and Number Theory: Part 2

// Functional.h
// Author: Zeeshan Amjad
// 
// Some Basic function for template meta programming
//

#ifndef _FUNCTIONAL_H
#define _FUNCTIONAL_H

// return the value of first parameter
template <int u, int v>
struct Value
{
	enum { value = u };
};

// add two numbers. 
// If second value is missing then return the first value 
template <int u, int v = 0>
struct Add
{
	enum { value = u + v };
};

// subtract one number from another
// If second value is missing then return the first value 
template <int u, int v = 0>
struct Subtract
{
	enum { value = u - v };
};

// subtract one number from another
// If second value is missing then return the first value 
template <int u, int v = 1>
struct Multiply
{
	enum { value = u * v };
};

// divide one number by another
// If second value is missing then return the first value 
template <int u, int v = 1>
struct Divide
{
	enum { value = u / v };
};

// Modulo operator
template <int u, int v>
struct Mod
{
	enum { value = u % v };
};

#endif