#pragma once
#include <chrono>
#include <cmath>
#include <limits>
#include <string>
#include <tuple>
class HoldTime {
 public:
  HoldTime(double time);
  ~HoldTime();
/**
 * @brief 
 * @param  exp_str          My Param doc
 * @return std::tuple<bool, double, std::string, std::string> 
 * 是否存在，时间，tagi，变量名
 */
  static std::tuple<bool, double, std::string, std::string> find_hold(
      std::string exp_str);

 public:
  void update_value(double tag_value);
  inline operator bool(void) const { return value; }
  inline bool get_value(void) const { return value; }

 private:
  double last_value;
  double hold_time;
  bool value;
  std::chrono::system_clock::time_point last_time;
};