/** @file list4002.cpp */
/** Listing 40-2. Implementation of the generate_id Function Call Operator */
#include "generate_id.hpp"

short generate_id::prefix_(1);

long generate_id::operator()()
{
  if (counter_ == max_counter_)
    counter_ = 0;
  else
    ++counter_;
  return prefix_ * (max_counter_ + 1) + counter_;
}