event.hpp

//Copyright Florian Goujeon 2021 - 2025.
//Distributed under the Boost Software License, Version 1.0.
//(See accompanying file LICENSE or copy at
//https://www.boost.org/LICENSE_1_0.txt)
//Official repository: https://github.com/fgoujeon/maki
 
#ifndef MAKI_EVENT_HPP
#define MAKI_EVENT_HPP
 
#include <type_traits>
 
namespace maki
{

template<class T>
struct event_t
{
    using type = T;
};

template<class T, class U>
constexpr bool operator==(const event_t<T> /*lhs*/, const event_t<U> /*rhs*/)
{
    return std::is_same_v<T, U>;
}

template<class T>
constexpr auto event = event_t<T>{};
 
namespace detail
{
    template<class T>
    struct is_event
    {
        static constexpr auto value = false;
    };
 
    template<class T>
    struct is_event<event_t<T>>
    {
        static constexpr auto value = true;
    };
 
    template<class T>
    constexpr bool is_event_v = is_event<T>::value;
}
 
} //namespace
 
#endif