duration.h

#pragma once
 
#include <iostream>
 
#include "software/time/time.h"
 
class Duration : public Time
{
   public:
    Duration();
 
    static const Duration fromSeconds(double seconds);
 
    static const Duration fromMilliseconds(double milliseconds);
 
    bool operator==(const Duration& other) const;
 
    bool operator!=(const Duration& other) const;
 
    bool operator<(const Duration& other) const;
 
    bool operator<=(const Duration& other) const;
 
    bool operator>(const Duration& other) const;
 
    bool operator>=(const Duration& other) const;
 
    Duration operator+(const Duration& duration) const;
 
    Duration operator-(const Duration& duration) const;
 
    Duration& operator+=(const Duration& duration);
 
    Duration& operator-=(const Duration& duration);
 
    friend std::ostream& operator<<(std::ostream& output_stream,
                                    const Duration& duration);
 
   private:
    explicit Duration(double duration_seconds);
};