SaturatingArithmetic.h

#pragma once
 
namespace CXXIter::util {
    
    //TODO: unit-tests
    
    template<typename T>
    struct SaturatingArithmetic {
        T value;
        SaturatingArithmetic(T value) : value(value) {}
        T get() const { return value; }
 
        SaturatingArithmetic<T> operator+(T o) {
            T res = value + o;
            res |= -(res < value);
            return res;
        }
        SaturatingArithmetic<T> operator-(T o) {
            T res = value - o;
            res &= -(res <= value);
            return res;
        }
        SaturatingArithmetic<T> operator/(T o) {
            return value / o;
        }
    };
    
}