#pragma once
#include <chrono>
#include <iostream>


struct Timer {
    using Clock = std::chrono::high_resolution_clock;
    using Duration = std::chrono::duration<float>;

    std::chrono::time_point<Clock> start, end;
    Duration duration;

    explicit Timer ( Duration& target ) : target_ ( target ),  start_( Clock::now() ) {}
    ~Timer () noexcept {
        target_ = Clock::now() - start_;
    }

private:
    Duration& target_;
    Clock::time_point start_;

};