StaticID.h

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/* This file is part of gbLAB.
 *
 * gbLAB is distributed without any warranty under the MIT License.
 */
 
 
#ifndef gbLAB_STATICID_H_
#define gbLAB_STATICID_H_
 
namespace oILAB {
 
/************************************************************/
/************************************************************/
template <typename Derived> class StaticID {
 
  // The increment
  static size_t increment;
 
  // The incremental counters
  static size_t count;
  static bool count_used;
 
public:
  const size_t sID;
 
  /**********************************************************************/
  StaticID() : sID(count) {
    count_used = true;
    count += increment;
  }
 
  /**********************************************************************/
  StaticID(const StaticID &) : sID(count) {
    count_used = true;
    count += increment;
  }
 
  /**********************************************************************/
  static size_t nextID() { return count; }
 
  static size_t &get_count() { return count; }
 
  /**********************************************************************/
  static void set_count(const size_t &newCount) {
    if (newCount < count) {
      throw std::runtime_error(
          "StaticID error: YOU ARE TRYING TO SET THE COUNTER TO A LOWER VALUE "
          "THAN THE CURRENT ONE\n");
    }
    count = newCount;
    count_used = false;
  }
 
  /**********************************************************************/
  static void set_increment(const size_t &newIncrement) {
    if (newIncrement < 1) {
      throw std::runtime_error("StaticID error: newIncrement MUST BE >=1\n");
    }
    if (count_used) {
      count -= increment;
      count += newIncrement;
    }
    increment = newIncrement;
  }
};
 
/* Static data members  *****************************/
template <typename Derived> size_t StaticID<Derived>::increment = 1;
 
template <typename Derived> size_t StaticID<Derived>::count = 0;
 
template <typename Derived> bool StaticID<Derived>::count_used = false;
 
} // namespace oILAB
#endif