TypeId.h

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/*
 * This is a part of the Uniot project.
 * Copyright (C) 2016-2025 Uniot <contact@uniot.io>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 

 
 
#pragma once
 
namespace uniot {

typedef const void* type_id;

class IWithType {
 public:
  virtual type_id getTypeId() const = 0;
};


class Type {
 public:
  template <class T>
  static inline type_id getTypeId() {
    static T* TypeUniqueMarker = nullptr;
    return &TypeUniqueMarker;
  }

  template <typename T>
  static inline T* safeStaticCast(IWithType* obj) {
    if (obj->getTypeId() == Type::getTypeId<T>()) {
      return static_cast<T*>(obj);
    }
    UNIOT_LOG_DEBUG("cast failed from [%lu] to [%lu]", obj->getTypeId(), Type::getTypeId<T>());
    return nullptr;
  }
};

}