system.hpp

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/*
 * MIT License
 *
 * Copyright (c) 2024 Giovanni Santini
 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */
 
#pragma once
 
#include <tuple>
#include <typeindex>
#include <vector>
 
namespace viotecs
{
 
template <typename... T> struct system
{
    using dependencies = std::tuple<T...>;
    virtual void run(std::vector<entity_t> e) const {};
};
 
template <typename... T> struct registered_systems
{
    using systems = std::tuple<T...>;
};
 
#define REGISTER_SYSTEMS(...)                                                  \
    void viotecs::world::run_systems()                                     \
    {                                                                          \
        typedef registered_systems<__VA_ARGS__>::systems registered_systems;   \
        const registered_systems systems;                                      \
        for_each(systems);                                                     \
    }
 
} // namespace viotecs