data.hpp

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/* Copyright (c) 2023 Otto Link. Distributed under the terms of the GNU General
 * Public License. The full license is in the file LICENSE, distributed with
 * this software. */
 
#pragma once
#include <memory>
#include <string>
#include <typeinfo>
 
namespace gnode
{
 
class BaseData
{
public:
  explicit BaseData(std::string type) : type(type) {}
 
  virtual ~BaseData() = default;
 
  bool is_same_type(const BaseData &data) const
  {
    return this->get_type() == data.get_type();
  }
 
  const std::string &get_type() const { return this->type; }
 
  virtual const void *get_value_ptr() const = 0;
  virtual void       *get_value_ptr() = 0; 
 
private:
  std::string type; 
};
 
template <typename T> class Data : public BaseData
{
public:
  template <typename... Args>
  explicit Data(Args &&...args)
      : BaseData(typeid(T).name()), value(std::forward<Args>(args)...)
  {
  }
 
  T *get_value_ref() { return &this->value; }
 
  const void *get_value_ptr() const override { return &this->value; }
  void       *get_value_ptr() { return &this->value; } 
 
private:
  T value{}; 
};
 
} // namespace gnode