Callback.h

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#ifndef Callback_h
#define Callback_h
 
// Local includes.
#include "Configuration.h"
 
// Library includes.
#include <ArduinoJson.h>
#if THINGSBOARD_ENABLE_STL
#include <functional>
#include <vector>
#endif // THINGSBOARD_ENABLE_STL
 
 
#if THINGSBOARD_ENABLE_STL && THINGSBOARD_ENABLE_DYNAMIC
template<typename T>
using Container = std::vector<T>;
#else
#include "Container.h"
#endif // THINGSBOARD_ENABLE_STL && THINGSBOARD_ENABLE_DYNAMIC
 
 
template<typename return_type, typename... argument_types>
class Callback {
  public:
#if THINGSBOARD_ENABLE_STL
    using function = std::function<return_type(argument_types... arguments)>;
#else
    using function = return_type (*)(argument_types... arguments);
#endif // THINGSBOARD_ENABLE_STL
 
    Callback() = default;
 
    explicit Callback(function callback)
      : m_callback(callback)
    {
        // Nothing to do
    }
 
    virtual ~Callback() = default;
 
    return_type Call_Callback(argument_types const &... arguments) const {
        if (!m_callback) {
          return return_type();
        }
        return m_callback(arguments...);
    }
 
    void Set_Callback(function callback) {
        m_callback = callback;
    }
 
  private:
    function   m_callback = {}; // Callback to call
};
 
#endif // Callback_h