EventRef.h

#pragma once
 
#include "mc/_HeaderOutputPredefine.h"
 
template <typename EventVariant>
class EventRef {
    static_assert(std::is_copy_constructible_v<EventVariant>, "EventVariant must be copy constructible");
 
public:
    template <typename Event>
    EventRef(Event& event)
        requires(!std::same_as<std::decay_t<Event>, EventRef> && std::is_const_v<Event>)
    : variant_(std::cref(event)) {}
 
    template <typename Event>
    EventRef(Event& event)
        requires(!std::same_as<std::decay_t<Event>, EventRef> && !std::is_const_v<Event>)
    : variant_(std::ref(event)) {}
 
    EventRef(const EventRef& other) = default;
 
    EventVariant& get() { return variant_; }
 
    EventVariant const& get() const { return variant_; }
 
private:
    EventVariant variant_;
};