DurationTracker.h

#pragma once
#include <chrono>
#include <string>

using namespace std;
using namespace chrono;

class DurationTracker
{
public:
    DurationTracker( const DurationTracker& other )  // NOLINT(hicpp-use-equals-default)
        : _startTime ( other._startTime ),
          _endTime ( other._endTime ),
          _timeElapsed ( other._timeElapsed ) {}

    DurationTracker( DurationTracker&& other ) noexcept
        : _startTime ( std::move(other._startTime) ),
          _endTime ( std::move(other._endTime) ),
          _timeElapsed ( other._timeElapsed ) {}

    DurationTracker& operator=( const DurationTracker& other )
    {
        if ( this == &other )
            return *this;
        _startTime = other._startTime;
        _endTime = other._endTime;
        _timeElapsed = other._timeElapsed;
        return *this;
    }

    DurationTracker& operator=( DurationTracker&& other ) noexcept
    {
        if ( this == &other )
            return *this;
        _startTime = std::move ( other._startTime );
        _endTime = std::move ( other._endTime );
        _timeElapsed = other._timeElapsed;
        return *this;
    }

    DurationTracker ();
    ~DurationTracker ();
    void start ();
    void stop ();
    string results () const;
    double getTimeElapsed () const;

private:
    void process ();

    high_resolution_clock::time_point _startTime;
    high_resolution_clock::time_point _endTime;
    double _timeElapsed;
};