#ifndef CYCLICINT_H
#define CYCLICINT_H

//! Class containing an integer which ranges from 0..N-1.
//! 
//! Exceeding the ends will overflow to the other end. Implicit cast to/from int is provided.
template<int N>
class CyclicInt {
	private:
		int value;
		
		CyclicInt set(int v) {
			value = v < N ? v < 0 ? N - -v % N : v : v % N;
			return *this;
		}
	
	public:
		CyclicInt() {
			
		}
		
		CyclicInt(int v) {
			set(v);
		}
		
		CyclicInt operator=(int v) {
			return set(v);
		}
		
		CyclicInt operator+(CyclicInt v) {
			return value + v.value;
		}
		
		CyclicInt operator+(int v) {
			return value + v;
		}
		
		CyclicInt operator+=(CyclicInt v) {
			return set(value + v.value);
		}
		
		CyclicInt operator++() {
			return set(value + 1);
		}
		
		CyclicInt operator++(int) {
			int v = value;
			set(value + 1);
			return v;
		}
		
		CyclicInt operator-(CyclicInt v) {
			return value - v.value;
		}
		
		CyclicInt operator-(int v) {
			return value - v;
		}
		
		CyclicInt operator-=(CyclicInt v) {
			return set(value - v.value);
		}
		
		CyclicInt operator--() {
			return set(value - 1);
		}
		
		CyclicInt operator--(int) {
			int v = value;
			set(value - 1);
			return v;
		}
		
		operator int() {
			return value;
		}
};


#endif