RingId.h

#pragma once
#include <cstddef>
#include <cstdio>

class RingId {
 public:
  static constexpr std::size_t MAX_NUM_RINGS = 12;

  explicit RingId(std::size_t idx) : idx_(idx) {
    if (idx >= MAX_NUM_RINGS) {
      throw std::out_of_range("Invalid ring index");
    }
  }

  std::size_t index() const noexcept { return idx_; }
 
 private:
  std::size_t idx_;
};