Clock.h

#pragma once
 
#include "spark/lib/Export.h"
 
#include "spark/base/Platforms.h"
 
#include <chrono>
 
namespace spark::lib
{
#ifdef SPARK_OS_WINDOWS
    template <typename T>
    concept IsDuration = std::chrono::_Is_duration_v<std::remove_cvref_t<T>>;
#else
    template <typename T>
    concept IsDuration = std::chrono::__is_duration<std::remove_cvref_t<T>>::value;
#endif
 
    class SPARK_LIB_EXPORT Clock
    {
    public:
        Clock();
        ~Clock() = default;
 
        Clock(const Clock& other) = default;
        Clock(Clock&& other) noexcept = default;
        Clock& operator=(const Clock& other) = default;
        Clock& operator=(Clock&& other) noexcept = default;
 
        template <typename T> requires IsDuration<T>
        [[nodiscard]] float elapsedTime() const;
 
        void restart();
 
        template <typename T> requires IsDuration<T>
        [[nodiscard]] float restart();
 
    private:
        std::chrono::steady_clock::time_point m_startTime;
    };
}
 
#include "spark/lib/impl/Clock.h"