builder_storage_base.hpp

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#pragma once
 
#include <cstddef>
#include <tuple>
#include <utility>
 
#include "metadata.hpp"
 
namespace yorch::detail {
 
template <typename Derived, typename... Nodes>
struct builder_storage_base {
    using tuple_type = std::tuple<Nodes...>;
 
    tuple_type nodes {};
 
    static constexpr std::size_t node_count = sizeof...(Nodes);
    static constexpr std::size_t max_level = detail::max_level_v<Nodes...>;
 
    template <std::size_t I>
    using node_type = std::tuple_element_t<I, tuple_type>;
 
    template <std::size_t I>
    [[nodiscard]] constexpr auto& entry() & noexcept {
        return std::get<I>(nodes);
    }
 
    template <std::size_t I>
    [[nodiscard]] constexpr const auto& entry() const& noexcept {
        return std::get<I>(nodes);
    }
 
    template <std::size_t I>
    [[nodiscard]] constexpr auto&& entry() && noexcept {
        return std::get<I>(std::move(nodes));
    }
};
 
} // namespace yorch::detail